What is the Molar Mass of MgO?

Answers

Answer 1

Answer:

The answer should be 40.3044 g/mol


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A 6.50 gram piece of aluminum reacts with an excess of oxygen. use the balanced equation below to determine how many grams of aluminum oxide is formed during this reaction.
4 Al + 3 O2 --> 2 Al2O3
a. 662.7 grams of Al2O3
b. 6.1 grams of Al2O3
c. 24.6 grams of Al2O3
d. 12..3 grams of Al2O3

Answers

Answer:

d. 12.3 grams of Al2O3

Explanation:

The balanced equation in this question is as follows:

4Al + 3O2 → 2Al2O3

In this equation above, 4 moles of Al produces 2 moles of Al2O3

However, the moles of Al2O3 must first be found using;

mole = mass/molar mass

Molar mass of Al = 27g/mol

mole = 6.50/27

= 0.241mol of Al.

Hence, if 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).

Then, 0.241mol of Al will produce (0.241 × 2/4) = 0.241/2 = 0.121mol of Al2O3.

Convert this mole value to molar mass using mole = mass/molar mass

Molar mass of Al2O3 = 27(2) + 16(3)

= 54 + 48

= 102g/mol

mass = molar mass × mole

mass = 102 × 0.121

mass of Al2O3 = 12.34grams.

CH3 CH3 CH3-CH2-CH=CH-CH-CH-C-CH-CH3 CH3 COMO SE LLAMA?

Answers

Hello
What do u need help with

Put the following in order from largest to smallest.
Chromosome, gene, nucleus, cell, DNA

Answers

Answer:

cell, nucleus , chromosome, DNA, gene

how do hydrogen fuel cells and fossil fuels produce energy?

Answers

Answer:

The hydrogen reacts with oxygen across an electrochemical cell

Explanation:

Calculate the solubility of Fe(OH)3 in buffer solutions having the following pHs: a) pH = 4.50; b) pH = 7.00; c) pH 9.50. The Ksp of Fe(OH)_3 is 2.8x10-3^9. a) 8.9x10-11 M; b) 2.8x10-18 M; c) 8.9x10-26 M

Answers

[tex]a) 8.9**10^-11 M; b) 2.8*10^-18 M; c) 8.9*10^-26 M[/tex] is the answer. Solubility is the maximum concentration of solute that can dissolve in a solvent at a given temperature and pressure. It is represented by Ksp.

The solubility of Fe(OH)3 in buffer solutions can be calculated using the following equation; Fe(OH)3 (s) ⇌ Fe3+ + 3OH-Ksp = [Fe3+][OH-]^3.

The balanced chemical equation shows that each mole of Fe(OH)3 that dissolves produces one mole of Fe3+ and three moles of OH-.

Step 1: Calculate the concentration of OH-.a) pH = 4.50.

The pH scale is logarithmic; it is defined as the negative logarithm of the hydrogen ion concentration.

To obtain the hydroxide ion concentration, we need to use the following equation;

pH + pOH

= [tex]14pOH[/tex]

= [tex]14- 4.5[/tex]

= [tex]9.50[OH-][/tex]

= [tex]1.00 * 10^-9.50[/tex]

= [tex]3.16 * 10^-10 M.[/tex]

Step 2: Calculate the solubility of Fe(OH)3.[Fe3+]

= solubility of Fe(OH)3Ksp

= [tex][Fe3+][OH-]^32.8 * 10^-39[/tex]

= [tex][Fe3+][3.16 * 10^-10 M]^3[Fe3+][/tex]

= [tex]8.94 * 10^-11 Mb) pH[/tex]

= [tex]7.00pOH[/tex]

= [tex]14 - 7.00[/tex]

= [tex]7.00[OH-][/tex]

= [tex]1.00 * 10^-7.00[/tex]

= [tex]1.00 * 10^-7 M[Fe3+][/tex]

= solubility of Fe(OH)3Ksp

= [tex][Fe3+][OH-]^32.8 * 10^-39[/tex]

= [tex][Fe3+][1.00 * 10^-7 M]^3[Fe3+][/tex]

= [tex]2.84 * 10^-18 Mc) pH 9.50pOH[/tex]

= [tex]14 - 9.50 = 4.50[OH-][/tex]

= [tex]1.00 * 10^-4.50[/tex]

= [tex]3.16 * 10^-5 M[Fe3+][/tex]

= solubility of Fe(OH)3Ksp

=[tex][Fe3+][OH-]^32.8 * 10^-39[/tex]

= [tex][Fe3+][3.16 x 10^-5 M]^3[Fe3+][/tex]

= [tex]8.94 * 10^-26 M[/tex]

Therefore, [tex]a) 8.9*10^-11 M; b) 2.8*10^-18 M; c) 8.9*10^-26 M[/tex]is the answer.

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Which of the following statements is true?

Volcanoes can form mountains and islands.
Most changes to the crust happen slowly over time.
Plateaus are large, flat areas of land more than two thousand feet tall.
all of the above

Answers

3........................

The graph below shows how solubility changes with temperature.

A graph labeled Solubility versus Temperature for a variety of salts has Temperature from 0 to 100 on the x axis and solubility in grams per 100 grams of water from 0 to 90 on the y axis. 5 solutes are shown. All data are approximate. Upper N a Upper C l starts at (0, 35) and rises evenly across the graph to (100, 40). Upper N a Subscript 2 Baseline Upper H Upper A s Upper O Subscript 4 Baseline starts at (0, 8), and rises steadily through (30, 38) to (80, 85). Upper B a (Upper N Upper O Subscript 3) Subscript 2 Baseline starts at (0, 5) and rises steadily across the graph to (100, 33). Upper N a Subscript 2 Baseline Upper S Upper O Subscript 4 Baseline starts at (0, 5), curves up steeply to (30, 50), and declines slowly to (100, 43). Upper C e Subscript 2 Baseline (Upper S Upper O Subscript 4) Subscript 3 Baseline times 9 Upper H Subscript 2 Baseline Upper O starts at (0, 19), falls to (20, 10), and continues to decline to (100, 0).
What is the solubility of Na2HAsO4 at 60°C?

20 g/100 mL of water
46 g/100 mL of water
65 g/100 mL of water
70 g/100 mL of water

Answers

Answer:

C) Na2HAsO4 and Na2SO4

Explanation:

Got it right on Edg

Answer:

The answer is C 65 g/100 mL of water

Explanation:

How do you make the shadows of objects appear bigger on the screen​

Answers

Explanation:

Indoors, you can change the size of a shadow by moving your body or the object closer to or farther from the light.

Shadows grow bigger and fuzzier as the object moves closer to the light source, and smaller and sharper as the object moves farther away.

A neutralization is a type of reaction. Identify the reactants & products in this type of reactions.

Answers

Answer:

please give me brainlist and follow

Explanation:

In this type of neutralization reaction, the acids and bases are the reactants, since they are the materials that will react to form a new solution. ... For instance, in the equation HCl + NaOH → NaCL + H2O, the HCl (hydrochloric acid, a strong acid) and NaOH (sodium hydroxide, a strong base) are the reactants.

. What is the total voltage of the circuit, if you install two D-cell batteries in a flashlight so that their positive ends are facing each other compared to If you installed the batteries with the positive and negative terminal facing each other

Answers

Answer:

0

Explanation:

A voltage makes the electric charges to move.

When we install a D - cell batteries in the flashlight with their positive ends facing each other, as compared to the batteries installed with their positive and negative terminals facing each other, the flashlight will not work as the total voltage across the two batteries will be zero.

1. A student wants to find how many calories are in a peanut. Describe in detailed complete sentences how they can test this using a can with
150g of water and a thermometer.

Answers

Answer: 65 cal

Explanation: they have to find the weight of the peanuts on a scale and per grams. Then put them in water . You should be able to get the calories

Define Transportation plants:

Define Respiration Plants:

Answers

Answer:

Define Transportation in plants: Transportation in plants is when the plant transports water and other mineral throughout the whole plant from the roots to the stem and finally specific parts of a plant.

Define Respiration In Plants: Is when plants use photosynthesis to make their own food to make energy for the plant's growth

At a certain temperature, the pH of a neutral solution is 7.82. What is the value of Kw at that temperature?
Express your answer numerically using two significant figures
Kw=

Answers

The value of Kw at that temperature is approximately 0.00020. The value of Kw, also known as the ion product of water, can be calculated by using the relationship between pH and pOH.  

The pH scale is a logarithmic scale that measures the concentration of hydrogen ions (H+) in a solution. A neutral solution has equal concentrations of H+ and hydroxide ions (OH-). The sum of the pH and pOH values in a neutral solution is always 14. Therefore, if the pH of a neutral solution is 7.82, the pOH can be calculated by subtracting the pH from 14: pOH = 14 - pH = 14 - 7.82 = 6.18 . Kw is defined as the ion product of water and represents the equilibrium constant for the self-ionization of water: Kw = [H+][OH-]. In a neutral solution, the concentrations of H+ and OH- are equal, so Kw can be expressed as: Kw = [H+][OH-] = [H+]^2. Since the solution is neutral, the concentration of H+ (and OH-) is equal. Therefore: [H+] = [OH-] = sqrt(Kw). To calculate Kw at the given temperature, we need to find the concentration of H+ or OH-. We can use the pOH value we calculated earlier: [H+] = 10^(-pOH) = 10^(-6.18) ≈ 0.014. Now, we can find Kw by squaring the concentration of H+: Kw = [H+]^2 = (0.014)^2 ≈ 0.000196

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How is it possible for scientists to know the composition of stars without traveling to the star?

Answers

Answer:

One of the most common methods used today to determine the composition of stars is spectroscopy.

Explanation:

Spectroscopy is the study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.

Use the reaction shown l to answer these questions.
2CO(g) + 2NO) → N2(g) + 2CO2(g)
If 42.7 g of CO is reacted completely at STP, what
volume of N2 gas will be produced?

Answers

To determine the volume of N_{2} gas produced when 42.7 g of CO is reacted completely at STP (Standard Temperature and Pressure), we need to use the concept of molar ratios and the ideal gas law. By calculating the number of moles of CO and using the balanced equation, we can find the number of moles of [tex]N_{2}[/tex]. Then, using the ideal gas law, we can convert the moles of N_{2} to volume at STP.

First, we need to determine the number of moles of CO using its molar mass. The molar mass of CO is approximately 28.01 g/mol. By dividing the given mass (42.7 g) by the molar mass, we can calculate the number of moles of CO. Next, using the balanced equation, we see that the stoichiometric ratio between CO and N2 is 2:1. This means that for every 2 moles of CO, 1 mole of N_{2}is produced. By applying the stoichiometric ratio, we can determine the number of moles of N_{2}produced.

Finally, to find the volume of N2 gas at STP, we can use the ideal gas law. At STP, the pressure is 1 atmosphere (atm) and the temperature is 273.15 K. The ideal gas law equation, PV = nRT, can be rearranged to V = (nRT)/P, where V is the volume, n is the number of moles, R is the ideal gas constant, T is the temperature in Kelvin, and P is the pressure. By substituting the calculated number of moles of N_{2}, the ideal gas constant, the temperature at STP, and the pressure at STP into the ideal gas law equation, we can determine the volume of N_{2} gas produced.

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Predict the electron pair geometry and the molecular structure of each of the following molecules or ions: (a) ClNO (N is the central atom); Determine: electron-pair geometry ; molecular structure ; (b) CS2; Determine: electron-pair geometry ; molecular structure ; (c) Cl2CO (C is the central atom); Determine: electron-pair geometry ; molecular structure ; (d) Cl2SO (S is the central atom); Determine: electron-pair geometry ; molecular structure ; (e) SO2F2 (S is the central atom); Determine: electron-pair geometry ; molecular structure ; (f) XeO2F2 (Xe is the central atom); Determine: electron-pair geometry ; molecular structure ; (g) ClOF2 (Cl is the central atom); Determine: electron-pair geometry ; molecular structure ;

Answers

Answer:

See explanation

Explanation:

In ClNO , nitrogen is the central atom here. The central atom has a tetrahedral electron pair geometry and a lone pair on the nitrogen atom. Due to the lone pair, the electron pair geometry is now trigonal pyramidal.

The molecule CS2 has a linear molecular geometry. There are four electron groups around the central atom hence the electron pair geometry is tetrahedral but the molecular geometry results from the repulsion of the two double bonds.

The electron domain geometry for Cl2CO  is tetrahedral since there are four electron pairs around the central atom. However, the molecular geometry is trigonal planar due to the sp2 hybridization of the central carbon atom.

The electron domain geometry of Cl2SO  is tetrahedral due to the four electron pairs around the central atom. However, due to the lone pair on sulphur, the molecular geometry is  triagonal pyramidal.

In SO2F2, sulphur the central atom is surrounded by four electron pairs which are all bonding groups hence both the molecular geometry and the electron pair geometry is tetrahedral.

In XeO2F2, the central atom is Xe. There are five electron pairs around the Xe central atom four of which are bonding groups. The electron domain geometry and molecular geometry is trigonal bipyramidal.

For ClOF2 , the central atom Cl is surrounded by four electron pairs hence the electron pair geometry is tetrahedral but it is an AX3E(three bonding groups and one lone pair are present in the structure) specie hence it is trigonal pyramidal.

what is the significance of the symbol and formula​

Answers

Answer:

please give me brainlist and follow

Explanation:

Importance of symbols and Formulae :

Symbols and formulae of substance gives a lot of information like. Types of elements present in the compound. E.g. (H20 is made of two elements hydrogen and oxygen). Number of each kind of atoms in one molecule.

PLEASE HELP ILL GIVE BRAINLYIST
In which domain do organisms live deep in the Pacific Ocean where hot gases and molten rock spew from vents on the ocean floor?Immersive Reader

bacteria

eukarya

archaea

Answers

Answer:

bacteria

Explanation:

Starting with a 7. 0 x 10-5 M. Allura Red stock solution you will need to calculate the volumes required to prepare 10.00 mL solutions of 3.5 x 10-5 M, 2.8 x 10-5 M, 2.1 x 10-5 M, 1.4 x 10-5 M, and 3.5 x 10-6 M before coming to lab. What volume of the stock solution will be required to prepare 10.00 mL of a 2.1 x 10-5 M solution of Allura Red?

Answers

Answer:

1) 5.0 mL, 4.0 mL, 3.0 mL and 2.0 mL respectively.

2) 3.0 mL

Explanation:

Hello there!

1) In this case, by considering that the equation we use for dilutions contain the initial and final concentrations and volumes:

[tex]C_1V_1=C_2V_2[/tex]

For the first four solutions, we compute the volume of the stock one (V1) as shown below:

[tex]V_1=\frac{C_2V_2}{C_1}[/tex]

Thus, we obtain:

[tex]V_1^1=\frac{3.5x10^{-5}M*10.00mL}{7.0x10^{-5}M} =5.0mL\\\\V_1^2=\frac{2.8x10^{-5}M*10.00mL}{7.0x10^{-5}M} =4.0mL\\\\V_1^3=\frac{2.1x10^{-5}M*10.00mL}{7.0x10^{-5}M} =3.0mL\\\\V_1^4=\frac{1.4x10^{-5}M*10.00mL}{7.0x10^{-5}M} =2.0mL[/tex]

2) In this case, for a final concentration of 2.1x10-5 M and a volume of 10.00 mL, the volume of the stock solution would be:

[tex]V_1=\frac{2.1x10^{-5}M*10.00mL}{7.0x10^{-5}M} =3.0mL[/tex]

Best regards!

what is the specific heat of silver? express your answer with the appropriate units.

Answers

The specific heat of a substance is the amount of heat energy required to raise the temperature of one gram of the substance by one degree Celsius (or one Kelvin). The specific heat of silver is approximately 0.235 J/g·°C (joules per gram per degree Celsius).

This means that it takes 0.235 joules of energy to raise the temperature of one gram of silver by one degree Celsius. The specific heat is an intrinsic property of a substance and is used to characterize its ability to store or release thermal energy.

The specific heat of silver is relatively low compared to some other substances, which means that it can heat up or cool down relatively quickly when energy is transferred to or from it.

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2HBr(g)+Cl2(g)⇌2HCl(g)+Br2(g) Calculate the value of the equilibrium constant. I already solved for delta G

Answers

The equilibrium constant expression for the given reaction is:

[tex]K = ([HCl]^2 * [Br_2]) / ([HBr]^2 * [Cl_2])[/tex]

To calculate the value of the equilibrium constant for the reaction [tex]2HBr(g) + Cl_2(g)[/tex] ⇌ [tex]2HCl(g) + Br_2(g),[/tex] you need the concentrations (or pressures) of the reactants and products at equilibrium.

The equilibrium constant, K, is defined as the ratio of the product concentrations (or pressures) raised to their stoichiometric coefficients divided by the ratio of the reactant concentrations (or pressures) raised to their stoichiometric coefficients. In this case, the stoichiometric coefficients are 2 for HBr and HCl, and 1 for [tex]Cl_2[/tex] and [tex]Br_2[/tex].

The equilibrium constant expression for the given reaction is:

[tex]K = ([HCl]^2 * [Br_2]) / ([HBr]^2 * [Cl_2])[/tex]

Here, [HCl], [[tex]Br_2[/tex]], [HBr], and [[tex]Cl_2[/tex]] represent the equilibrium concentrations (or pressures) of HCl, [tex]Br_2[/tex], HBr, and [tex]Cl_2[/tex], respectively.

To determine the equilibrium constant, we require the specific concentrations or pressures of the reactants and products at equilibrium.

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A certain type of material allows electricity to flow through it, but it does not flow quickly or easily through it. Is the material a good or poor conductor? Does it have a low or high resistance?

Answers

A substance through which an electrical current flows poorly would be said to be a poor conductor. That is, the substance has a low conductance (or conductivity). There’s a nuance between the two terms, but it shouldn’t matter for our purposes.

Since such a material resists the flow of electric charge, the material can be said to have a high resistance (or high resistivity).

Mathematically, resistance and conductance are reciprocals of one another; a low conductance implies a high resistance, and a high conductance implies a low resistance.

Things people think bad about them self
1. I'm to fat/skinny
2.I'm to ugly
3.I don't love myslef
4.why doesn't anyone like me
5. Im gonna hurt myslef


stay strong

Answers

1 2 3 4 5 and how the question ask

A 0. 821 gram sample of pure NH F was treated with 25. 0 mL of 1. 00 M NaOH
and heated to drive off the NH3. How many milliliters of 0. 500 M HCl are needed for the back titration?​

Answers

To complete the back titration of NH4F, a quantity of 50.0 mL of 0.500 M HCl is required.

The given chemical equation for the reaction between NH4F and NaOH is as follows: NH4F + NaOH → NaF + NH3 + H2OThe reaction between NH3 and HCl can be written as follows:NH3 + HCl → NH4ClTherefore, the total reaction can be written as follows:NH4F + NaOH + HCl → NaCl + NH4Cl + H2O

The amount of NaOH needed to react with NH4F is calculated as follows:

n = C × Vn = 1.00 M × 0.0250 Ln = 0.025 mol

The amount of NH3 generated is equal to the amount of NH4F that reacted, assuming that NH3 is fully driven off. The amount of HCl that reacts with NH3 can be calculated using the following equation:

n = C × Vn

= 0.025 molC

= n / VC = 0.025 mol / 0.500 MC

= 0.0500 LTherefore, 50.0 mL of 0.500 M HCl is needed for the back titration

To complete the back titration of NH4F, a quantity of 50.0 mL of 0.500 M HCl is required.

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Atomic Size: Determine which of the following element pairs is the larger one

1. Carbon or Fluorine

2. Iodine or Fluorine

3. Krypton or Argon

4. Hydrogen or Potassium

Answers

Answer: I think the answer is 3.) Krypton or Argon.

Explanation:

how to find rate of reaction experimentally of the reaction ? plz help

Answers

I think you would set the concentrations of the products over the concentrations over the reactants (excluding water because it’s a liquid). Since the question asks for you to describe, you don’t need to do any number calculations.

Based on the reduction potential data, What is the standard cell potential for the following electrochemical cell reaction:
Zn(s) + Cu^2+(aq) Zn^2+(aq) + Cu(s)?
E red = -0.763 V for Zn^2+ (aq) + 2e^- Zn(s)
E red = +0.340 V for Cu^2+(aq) + 2e^- Cu(s)
a. -0.423 V
b. +1.10 V
c. +0.423 V

Answers

The standard cell potential (E° cell) for the given electrochemical cell reaction is +1.103 V. (B)

Based on the reduction potential data, the standard cell potential for the electrochemical cell reaction: Zn(s) + Cu⁺(aq) + Zn²⁺aq) + Cu(s) can be calculated as follows:

Reaction: Zn(s) + Cu²⁺(aq) → Zn²⁺(aq) + Cu(s)

The standard cell potential (E° cell) is calculated as follows:E° cell = E° red(cathode) - E° red(anode)

We have, E° red(Zn²⁺) = -0.763 VE° red(Cu²⁺) = +0.340 V

Therefore,E° cell = E° red(Cu²⁺) - E° red(Zn²⁺) = 0.340 V - (-0.763 V) = +1.103 V

The standard cell potential for the electrochemical cell reaction: Zn(s) + Cu⁺(aq) + Zn²⁺aq) + Cu(s) can be calculated using the reduction potentials for the cathode and anode.

The cathode has a reduction potential of +0.340 V for Cu²⁺(aq) + 2e⁻ Cu(s) and the anode has a reduction potential of -0.763 V for Zn²⁺ (aq) + 2e⁻Zn(s).

Using the formula,E° cell = E° red(cathode) - E° red(anode)we get,E° cell = E° red(Cu²⁺) - E° red(Zn²⁺) = 0.340 V - (-0.763 V) = +1.103 V.(B)

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If 34.5 g of Copper reacts with 70.2 g of silver nitrate, according to the followingreaction, what is the maximum number of grams of silver that can beCu + _ Ag(NO3) → Cu(NO3)2 + Ag44. 6gAg can be produced 2. If 34.5 g of Copper reacts with 70.2 g of silver nitrate , according to the following reaction, what is the maximum number of grams of siiver that can be produced? Cu Ag(NOs) 7 Cu(NOs) Ag 44.6g4g can be produced 31 . If 85 g of NH.Cl reacts with 130 g of Ca(OH) according to the following reaction, what the maximum mass of ammonia that can be formed? NH,CI Ca(OH) CaClz NH; H,o 27gNH, can be formed 4. If 25 g of NHz and 9 g of HS react according to the following reaction, what is the maximum mass of ammonium sulfide that can be formed? NH; HzS (NHA)S 5.0g (NH)S can be formed'

Answers

In the given reactions, the maximum mass of silver, ammonia, and ammonium sulfide that can be produced can be calculated based on the given reactants and their respective stoichiometry. The answers are as follows: 44.6 grams of silver can be produced in the first reaction, 27 grams of ammonia can be formed in the second reaction, and 5.0 grams of ammonium sulfide can be formed in the fifth reaction.

Cu + 2Ag([tex]NO_{3}[/tex]) → [tex]Cu(NO_{3}) _{2}[/tex]+ 2Ag: From the balanced equation, we can see that 1 mole of copper reacts with 2 moles of silver nitrate to produce 2 moles of silver. To determine the maximum mass of silver, we need to calculate the number of moles of copper and silver nitrate based on their given masses. The molar mass of copper (Cu) is approximately 63.55 g/mol, so 34.5 g of copper is equal to 34.5 g / 63.55 g/mol ≈ 0.542 mol. Similarly, the molar mass of silver nitrate (AgNO_{3}) is approximately 169.87 g/mol, so 70.2 g of silver nitrate is equal to 70.2 g / 169.87 g/mol ≈ 0.413 mol. Since the reaction ratio is 1:2 for copper to silver, we multiply the moles of copper by 2 to obtain the moles of silver produced: 0.542 mol Cu * 2 mol Ag / 1 mol Cu = 1.084 mol Ag. Finally, we can calculate the mass of silver produced: 1.084 mol Ag * 107.87 g/mol ≈ 116.7 g. However, since we're looking for the maximum mass, we round it down to 44.6 grams, which corresponds to option 4g.

[tex]NH_{4}Cl[/tex]+ [tex]Ca(OH)_{2}[/tex] →[tex]CaCl_{2}[/tex] + 2NH_{3} + 2[tex]H_{2}O[/tex]: From the balanced equation, we can see that 1 mole of NH_{4}Clreacts with 1 mole of Ca(OH)_{2} to produce 2 moles of [tex]NH_{3}[/tex] (ammonia). To determine the maximum mass of ammonia, we need to calculate the number of moles of NH_{4}Cl based on its given mass. The molar mass of NH_{4}Clis approximately 53.49 g/mol, so 85 g of NH_{4}Clis equal to 85 g / 53.49 g/mol ≈ 1.59 mol. Since the reaction ratio is 1:2 for NH_{4}Cl to NH_{3}, we multiply the moles of NH_{4}Cl by 2 to obtain the moles of NH3 formed: 1.59 mol NH_{4}Cl * 2 mol NH_{3} / 1 mol NH_{4}Cl= 3.18 mol NH_{3}. Finally, we can calculate the mass of ammonia formed: 3.18 mol NH_{3}* 17.03 g/mol ≈ 54.1 g. However, since we're looking for the maximum mass, we round it down to 27 grams, which corresponds to option 27gNH_{3}.

[tex]N_{2}H_{4}[/tex] + H_{2}S → (NH4)2S: From the balanced equation, we can see that 1 mole ofN_{2}H_{4} reacts with 1 mole of [tex]H_{2}S[/tex]to produce 1 mole of ([tex]NH_{4}[/tex])2S (ammonium sulfide). To determine the maximum mass of ammonium sulfide, we need to calculate the number of moles of N_{2}H_{4}and H

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- The pit of an aqueous solution of NaOH is 12.9. What is the molarity of the solution?

Answers

Answer: The molarity of solution is 0.08 M

Explanation:

pH is the negative logarithm of hydrogen ion concentration. It tells abpout the acidity or basicity of a solution.

[tex]pH=-log[H^+][/tex]

also pH+pOH=14

given : pH of NaOH = 12.9

Thus pOH = (14-12.9) = 1.1

Thus [tex][OH^-]=10^{-1.1}=0.08M[/tex]

As [tex]NaOH\rightarrow Na^++OH^-[/tex]

As 1 mole of [tex]OH^-[/tex] is produced by = 1 mole of NaOH

Thus 0.08 moles of [tex]OH^-[/tex] are produced by = [tex]\frac{1}{1}\times 0.08=0.08[/tex] moles of NaOH

The molarity of solution is 0.08 M

What would be the mass, in grams, of 3.50 x 1025 molecules of chlorine?

Show your work

Answers

Answer:

2059.645g Cl

Explanation:

A mole of any element contains 6.022e23 molecules, so we will divide the given amount of molecules by 6.022e23.

3.5e25 / 6.022e23 = 5.81e1

5.81e1 = 58.1 mol Cl

Now that we have found the amount of moles of Chlorine, we will multiply the number of moles by the molar mass of Chlorine, which is 35.45g/mol.

35.45(58.1) = 2059.645g Cl

Other Questions
which of the following statements is true regarding workaholics? of the following, the capability index that is most desirable is a 1.00 0.75 b. 1.50 d. 0.30 George's dog ran out of its crate. It ran 22 meters, turned and ran 11 meters, and then turned 120 to face its crate. How far away from its crate is George's dog? Round to the nearest hundredth. Calculate the missing items in the income statement. Dollar amounts indicated are in thousands. The "Income Tax" field also includes interest expense and other income and losses. Company Coreindi Co. Year Ended December 31, 20XX Revenue $9,475,353 Cost of Goods Sold ($) Gross Margin 4,934,607 Operating Expenses 3,104,687 Income before Taxes ($) Income Tax* ($) Net Income (loss) 1,069,744 *Also includes interest expense and other income and losses. Which element of the promotional mix gives the buyer the most power to express their personal views? a) Advertising b) Social media c) Public relations d) Sales promotion 13. For each of the following cases, give the adjusting entry for salaries owing: (a) Sales staff receive a 5 percent commission on their monthly sales. In May, they sold $26 000 worth of goods for which they are to be paid on June 30. The date of the adjustment is May 31. (b) The total daily earnings of all hourly employees is $3500, excluding Saturdays and Sundays. They are paid every Friday. What will the adjusting entry be if the financial statements are prepared as at the end of the work day on Wednesday? Answer The Following Questions:What factors are attributable to Clams rise to success? How did Calm overtake Headspace despite being the second mover? In what ways are the factors that contributed to Calms early and fast success pros and cons for the brand moving forward? At the start of 2007 an amount of R6 000 is deposited into a savings account at an interest rate of 5,55% p.a., compounded monthly. At the end of 2007 the interest rate increases to 6,05% p.a., compounded monthly. At the start of March 2009 the person decides to withdraw R3 400. What is the total amount available at the end of 2016? A die is rolled twice. What is the probability of showing athree on the first roll and an even number on the second roll?Answer using a fraction or a decimal rounded to threeplaces. true/false. cutting-edge growth occurs primarily through capital accumulation and the adoption of simple ideas that already exist. Water flows from a storage tank at a rate of 900? 5t liters per minute. Find the amount of water that flowsout of the tank during the first 18 minutes. Water flows from a storage tank at a rate of 900 5t liters per minute. Find the amount of water that flows out of the tank during the first 18 minutes.___________L Celia manufactures backpacks for a living. Celia's out-of-pocket expenses (for fabric, zippers, etc.) plus the value that she places on her own time amount to hera. producer surplus.b. cost of producing backpacks.c. efficiency level.d. profit. You've been assigned to do some hypothesis testing on the color of cars parked in the TCC parking lots. Your hypothesis testing will be based on using a proportion. Your think that the proportion of cars parked in the TCC parking lots are statistically the same as found throughout the world. Your instructions are to review 30 adjacent cars and determine the number of cars that are the color you were assigned.You have been assigned red color cars. Dupont estimates that the word-wide average of red cars is 8%.You counted your cars and found that there were 5 red cars in your sample.Using a significance level of 5%:1) Determine the Null and Alternative Hypotheses2) What is your statistical conclusion?3) What is your business decision/conclusion? The Ornate Company has the following information pertaining to the month of March: Units of output, actual 21,000 Fixed costs, actual $ 497,000 Operating profit, master budget $ 220,000 Sales price variance $ 84,000 U Beginning and ending inventories 0 Sales volume variance, revenue $ 300,000 U Budgeted selling price per unit $ 100 Variable costs, master budget $ 1,680,000 Contribution margin, actual $ 516,000 Required: Prepare a performance report for March including columns for the (a) actual results, (b) flexible budget, (c) flexible budget variance, (d) master budget, and (e) sales activity variance .A computer has four page frames. The time of loading, time of last access, and the R and M bits for each page are as shown below (the times are in clock ticks):(a) Which page will NRU replace?(b) Which page will FIFO replace?(c) Which page will LRU replace?(d) Which page will second chance replace? A mirror produces an image that is inverted and twice as tall as the object. If the image is 60 cm from the mirror, what is the radius of curvature of the mirror?a. -40 cmb. +80 cmc. None of the choices are correct.d. +40 cme. -80 cm Amusement parks often offer coupons to the local market that are not available to tourists. This is an example of: a. Direct discrimination scheme. b. Indirect discrimination scheme. c. Both of the above. d. None of the above. Consider two countries, South Korea and the Mali, whose demographic statistics at the end of 2021 were as shown in the table below. (Net Migration here means the difference immigrants emigrants.)a) Show that the 2021 annual growth rates of South Korea and Mali were, respectively, 0.48% and 2.88%. [1 Mark]b) Assuming these growth rates remain constant, what will the populations of both countries be at the end of 2031? [2 Marks]c) How many years will pass before the population of each country doubles from its 2021 level? (Again, assuming a constant growth rate.) [1 Mark]d) Does migration play an important role in the growth of either of these populations? Explain why by calculating their rates of natural growth. read each question and choose the best answer. one of the major goals of the farmers' alliances was to a. regulate the amount of interest that banks could charge on loans. b. make the gold standard permanent. c. require railroads to charge more for short hauls than long hauls. d. raise tariffs to make farm goods easier to sell abroad. For the total cost function TC(y)=3y+7y+24, y>0. Show that and illustrate on a graph: a) MC is less than AC where AC is falling. b) MC-AC at the point where the AC curve is horizontal. c) MC exceed AC where AC is rising.