Calculate how many grams of iron can be made from 16.5 grams of iron(III) oxide if hydrogen gas is in excess?

Explanation:

Correct option is C)

HCl is most polar due to the high electronegativity of Cl.

Answer:

the answer D

Explanation:

I hope it's helps you

Advantages of Digital thermometer:

Digital thermometer readings can be more readily combined with computer software.      

Digital thermometer:  

Compared to current clinical thermometers, it represents a step forward. There are now digital thermometers available that can measure temperature accurately without using mercury due to mercury's high toxicity and difficulties in disposing of it when a thermometer breaks.

Digital thermometers measure body temperature using heat sensors. They can be utilized to measure body temperatures in the mouth, rectum, or armpit.

Advantage: They are affordable, simple to read, lightweight, portable and need minimal upkeep, and provide precise readings.

Disadvantage: Eventually, the battery powering them runs out, and they are readily broken if dropped.

Liquid-based thermometer:  

It is the most basic and widely used type of temperature measurement instrument.  

Advantage: They are relatively less expensive. In contrast to electrical thermometers, they don't require a power source or batteries to charge.

Disadvantage: They are fragile, only suitable for manual reading applications, and cannot be automated or digitized. A glass thermometer's liquid components could be hazardous or harmful to your health since they could leak chemicals. Liquid-in-glass thermometer readings require excellent vision.

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The electronic configuration of x, y, and z.

[tex]x=1s^2[/tex]

[tex]Y= 1s^22s^22p^63s^2[/tex]

[tex]Z= 1s^22s^22p^63s^23p^5[/tex]

Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.

a.

[tex]x=1s^2[/tex]

[tex]Y= 1s^22s^22p^63s^2[/tex]

[tex]Z= 1s^22s^22p^63s^23p^5[/tex]

b.

x= Period 1 and group18

Y=Element is in period 3 and Group 2

Z=Element is in period 3 and group 17.

c.

X, Y & Z represents Helium, magnesium, and chlorine.

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Answer:

Al(OH)₃ + 3 HCl ----> AlCl₃ + 3 H₂O

Explanation:

In a double-displacement reaction, the cation of one compound is swapped with the cation of another. The basic structure of these reactions is:

AB + CD ----> AD + CB

In this reaction, the aluminum (Al) of Al(OH₃) is replaced by the hydrogen (H) of HCl, and vice versa.

The first resulting compound is AlCl₃. The chlorine has a subscript of 3 in order to eliminate the +3 charge from the Al cation (+3 + 3(-1) = 0). The second resulting compound is HOH, most commonly written as H₂O. There needs to be a coefficient of 3 in front of H₂O to balance the equation.

The complete balanced equation is:

Al(OH)₃ + 3 HCl ----> AlCl₃ + 3 H₂O

Answer:

False

Explanation:

Forms of a given element that have a different number of neutrons are called isotopes.

Answer:

carbon dioxide

Explanation:

it is used in photosynthesis

25.54 g of diethyl ether would you obtain from 41.8 g of ethyl alcohol if the per cent yield of the reaction is 76.6 %.

A mole is defined as 6.02214076 × [tex]10^{23}[/tex]of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

Step 1: Write the balanced equation

2 CH₃CH₂OH ⇒ CH₃CH₂OCH₂CH₃ + H₂O

Step 2: Calculate the moles corresponding to 41.8 g of CH₃CH₂OH

The molar mass of CH₃CH₂OH is 46.07 g/mol.

41.8 g × 1 mol ÷ 46.07 g = 0.90.

Step 3: Calculate the theoretical moles of CH₃CH₂OCH₂CH₃ produced

The molar ratio of CH₃CH₂OH to CH₃CH₂OCH₂CH₃ is 2:1. The moles of CH₃CH₂OCH₂CH₃ theoretically produced are 1/2 × 0.90 mol = 0.45

Step 4: Calculate the real moles of CH₃CH₂OCH₂CH₃ produced

The percent yield of the reaction is 85%.

0.45 mol × 76.6% = 0.3447 mol

Step 5: Calculate the mass corresponding to  0.3447 moles of CH₃CH₂OCH₂CH₃

The molar mass of CH₃CH₂OCH₂CH₃ is 74.12 g/mol.

34.47 mol × 74.12 g/mol = 25.549164 g

Hence, 25.54 g of diethyl ether would you obtain from 41.8 g of ethyl alcohol if the per cent yield of the reaction is 76.6 %.

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As Scientist B did the experiment incorrectly tht is Gretchen measured out 5 grams of aluminum and heated it with excess fluorine gas.

Chemical Stoichiometry refers back to the quantitative look at of the reactants and merchandise concerned in a chemical reaction. The word “ stoichiometry” is derived from the Greek word “stoikhein” which means detail and “metron” which means measure.

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Answer:

2Al+1.5O2→Al2O3

Thus, 2 mol of Al combine with 1.5 mol of oxygen to form 1 mol of Al2O3.

2 mol of Al corresponds to 2×27=54 g.

Thus, the weight of Al used in the reaction is 54 g.

The molecules of Sodium chloride holds a chemical bond to become stable when dry is an ionic bond.

The chemical bonds are those which holds the atoms of molecules together and creates a temporary connection between them.

The three major types of chemical bonds are:

The ionic bonds generally occurs in between a metal and a nonmetal ions.

The atoms share electrons in between them to become stable, forms ions. Due to electric attraction between these ions forms a bond between them. That bond is called as Ionic bond.

Sodium chloride - NaCl

Where Na(sodium) forms Na⁺ ion(metal) by sharing electrons with the chlorine atom and Cl(chlorine) forms Cl⁻ ion(non-metal).

So, due to the attraction between the anion and the cation, a bond is established between them. So, it is called Ionic bond.

Therefore, the chemical bond in Sodium chloride is an Ionic bond.

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Answer:

I am sorry

Explanation:

The approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is -95.07N

The universal law of gravitation states that the particle of matter in the universe attracts another particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

It is written thus;

F = G [tex]M_1M_2[/tex]÷ [tex]r^2[/tex]

Where

F = Gravitational force

G = Gravitational constant

[tex]M_1[/tex] and [tex]M_2[/tex] are the masses of the object

r = radius

How to calculate the gravitational force

Formula:

F = G [tex]M_1M_2[/tex]÷ [tex]r^2[/tex]

Given [tex]M_1[/tex] = 100kg

[tex]M_2[/tex] = 5.97 x[tex]10^{24}[/tex] kg

r = 7.5 x [tex]10^6[/tex] m

G =  6.67 x [tex]10^{-11}[/tex] N-m²/kg²

For the first orbit, substitute the values

F = 6.67 x [tex]10^{-11}[/tex]× 150 ×  5.97 x [tex]10^{24}[/tex] ÷ (7.5 x[tex]10^6[/tex])[tex]^2[/tex]

F = 5.95 × [tex]10^{16}[/tex] ÷ 56.25 × [tex]10^{12}[/tex]=  105.77 N

For the second orbit of radius 7.7 x 10^6 m

F =  6.67 x [tex]10^{-11}[/tex] × 100 ×  5.97 x [tex]10^{24}[/tex] ÷ (7.7 x [tex]10^6[/tex])2

F = 5.95 × [tex]10^{16}[/tex]÷ 59.25 × [tex]10^{12}[/tex] = 200. 84 N

The approximate change = 105. 77 - 200. 84 = -95.07N

Hence, the approximate change in gravitational force from Earth as a result of the change in radius of the satellite's orbit is -95.07N

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Possible products in this reaction are the products 2 and 3.

The Friedel Crafts reaction is one in which the electrophile is created by a Lewis acid reaction between the AlCl3 and the alkylhalide reactant .

Now we know that there is the possibility of two products in this reaction due to a resonance shift as such possible products in this reaction are the products 2 and 3.

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The efficiency of the engine is 91%.

The efficiency of the engine signifies how much heat is used and converted successfully into usable heat. It is fact that no engine can be 100% efficient because heat loss takes place in different ways during the process.

The efficiency of the engine is calculated by the formula:

Efficiency = Output heat/Input heat x 100

The temperature of heat engine is 1800 K. The temperature of the surrounding is 160 K.

Substitute the values in the above formula.

Efficiency = (1800 - 160)/1800 x 100

= 91%

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Answer:

91%

Explanation:

got it right on edge 23

The types of atoms stay the same in chemical reactions but not in nuclear reactions. The correct option is C.

In chemical reactions, atoms remain the same at the end of every reaction. Although the bonds between atoms may change.

In nuclear reactions, atoms fuse with other atoms to form new atoms entirely. This is otherwise known as nuclear fusion.

Another type of nuclear reaction is nuclear fission. A single atom decomposes to form 2 or more different atoms entirely.

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Answer:

C) types of atoms

Explanation:

i just took the test

Because the molecules are more closely spaced, the solid occupies less space than the same substance when it is in a gaseous state.

The answers are as follows;

3 - 4.95 atm

4 - 539 L

5 - 4 L

The gas laws are used to establish the relationship between the pressure, volume, number of moles etc of a gas.

3.

V1 = 1.50 L

V2 = 0.50 L

P1 = 1.65 atm

P2 = ?

P1V1 = P2V2

P2 = P1V1 /V2

P2 = (1.50)(1.65) / (0.50)

P2 = 4.95 atm

4.

P1V1 = P2V2

P1 =  760 mm Hg

V1 = 200.0 L

P2 = 282 mm Hg

V2 = ?

V2 = P1V1/P2

V2 = 760 mm Hg * 200.0 L/282 mm Hg

V2 = 539 L

The volume of the gas increases because the pressure decreases.

5.

Using

V1/T1 = V2/T2

V1T2 =V2T1

V2 = V1T2/T1

V2 = 3.00 L * 373 K/ 273 K

V2 = 4 L

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The amount of oxygen needed would be 80.19 grams

From the equation of the reaction:

[tex]4NH_3 +3 O_2 --- > 2N_2 + 6H_2O[/tex]

The mole ratio of oxygen and ammonia is 3:4

Mole of 56.8g ammonia = 56.8/17 = 3.34 moles

Equivalent mole of oxygen = 3/4 x 3.34 = 2.5059 moles

Mass of 2.5059 moles oxygen = 2.5059 x 32 = 80.19 grams

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Answer:

C

Explanation:

Answer:

The awnser is C: it tells you how much of a molecule IS up of each element.

Taking into account the ideal gas law,  the density of methanol vapor is 1.1219 [tex]\frac{g}{L}[/tex].

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law:

P×V = n×R×T

where

Now, taking into account this law, you get:

[tex]\frac{n}{V} =\frac{P}{RXT}[/tex]

The units are moles/L. So, in order to calculate the density, it is necessary to take into account the molar mass, in order to calculate the density as follows:

[tex]density =\frac{P}{RXT}xmolar mass[/tex]

Then, in this case, you know:

Replacing in the previous expression:

[tex]density =\frac{1.15 atm}{0.082\frac{atmL}{molK} X400 K}x32 \frac{g}{mol}[/tex]

Solving:

density= 1.1219 [tex]\frac{g}{L}[/tex]

Finally, the density of methanol vapor is 1.1219 [tex]\frac{g}{L}[/tex].

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The mass of a sample of tin whose temperature decreases from 15.0°C to –10.0°C as it releases 543 J of energy is 478.4g.

The mass of a substance that underwent release of energy can be calculated using the following formula:

Q = mc∆T

Where;

543 = m × 0.227 × 5

543 = 1.135m

m = 543/1.135

m = 478.4g

Therefore, the mass of a sample of tin whose temperature decreases from 15.0°C to –10.0°C as it releases 543 J of energy is 478.4g.

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The values of the changes are

ΔH = 46.44kJ

Δu =  43.34Kj

ΔS = 126.6 J/K

= 1 mol + 75.3 (100 + 273) - 25 + 273 + 1 * 40.79

= 5.6475 + 40.79

= 46.44kJ

1 mol + 75.3 x ln 373/298 + 1 mol x 40.79

= 0.1263

ΔS = 126.6 J/K

46.44 - 0.00831 * 373

= 43.34Kj

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Answer:

Add Copper(II) oxide, CuO, to an aqueous solution of hydrochloric acid, HCl, to produce the salt copper chloride, CuCl2. To obtain a pure, dry sample of the salt, remove excess, undissolved CuO through filtration. Then heat the system to evaporate water, leaving behind pure Copper(II) Oxide.

Oil-based food coloring used to make the letters, won't dissolve in water. According to some sources, oil-based food coloring is either insoluble or immiscible in water. Because it is present in more solutions, water serves as the universal solvent.

A substance that displaces most compounds is known as a universal solvent. Because it dissolves more chemicals than any other solvent, water is known as the universal solvent.

Sand, plastic, wood, metal, glass, and cloth are examples of insoluble materials. At standard conditions of pressure and temperature, these compounds never dissolve in water or any other solvent. Other examples of insoluble materials are sugars and inorganic salts.

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Empirical formula = mol ratio

mol H = 9.42 x 10²⁴ : 6.02 x 10²³ = 15.648

mol N = 3/9 x 15.648 = 5.216

mass N = 5.216 x 14 g/mol =73.024 g

Answer:

here is the answer

tell me is it helpful

The reaction rate of the SN1 reaction change if the electrophile is switched from the tertiary electrophile to a secondary electrophile will decrease.

SN1 exhibits substitution, nucleophilicity, and monomolecular reaction, and is expressed by the expression rate = k [R-LG]. This means that the rate-determining step of the mechanism depends on the degradation of a single molecular species. Multi-step reactions include intermediates and multiple transition states (TS).

The SN1 reaction is a nucleophilic substitution reaction in which the nucleophile replaces the leaving group (similar to SN2). However, the SN1 reaction is a single molecule. The rate of this reaction depends on the concentration of only one reactant.

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Internal combustion energy for TNT(Trinitro toluene) is found to be  -170 kJ.

Internal energy= (- heat evolved by the system) + Work done by the system

ΔU = -Q+W

W = - PΔV

P= pressure

ΔV =difference in volume

Given,

V1 = 10 L

V2 = 90 L

∴ΔV = V2-V1 = 90-10 = 80 L

P = 1 atm

∴W = - ( 1× 80)

      = -80 kJ

Heat evolved by the system = 90 kJ

∴Δ U= - 90 kJ - 80 kJ

       = - 170 kJ

Thus, Internal combustion energy for TNT(Trinitro toluene) is found to be -170 kJ.

NOTE : here work done by the system is considered negative and also heat evolved by the system is taken -Ve.

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The balanced net ionic equation for the reaction, that occurs when aqueous solutions of Na₂CO₃ and CaCl₂ are mixed is Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq).

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

The balanced equation for Na₂CO₃ and CaCl₂ is as follows

Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq)

When two aqueous solutions are mixed then a white insoluble solid  CaCO₃ will precipitate out of solution. The above reaction is double displacement reaction.

Thus from the above conclusion we can say that The balanced net ionic equation for the reaction, that occurs when aqueous solutions of Na₂CO₃ and CaCl₂ are mixed is Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq).

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Answer:

5 moles

Explanation:

From the coefficients of the equation, we know that for every 8 moles of nitric acid consumed, 4 moles of water are produced.

So, the answer is 9(4/8), which is 5 moles to 1 sf.