Answer:
1470 kJ (to 3 sf)
Explanation:
(802)(1.83) = 1470 kJ (to 3 sf)
Choose two answers
Why does the oil in this soup gather into drops instead of dissolving evenly throughout the surface of the water
Oil drops do not spread across hot water because the surface tension of hot water is lower than that of oil. The water molecules cannot share intermolecular forces with the oil molecules. Thus the correct option is C.
Oil has a higher surface tension than hot soup. It prevents an oil drop from spreading over the heated soup. The surface tension of oil is lower than that of soup when the soup's temperature drops. As a result, the oil drop begins to spread across the soup.
The cohesive force between oil molecules is less than the adhesive force between oil and water molecules. As a result, water molecules and oil molecules do not mix.
Thus the correct option is C.
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Sodium tungstate is Na₂WO4. Therefore, the formula for gold(III) tungstate is
Explanation:
Na2WO4 2Na+ + wo4 2-
2Au3+ + 3wo42- Au2(WO4)3
A negatively charged substance is brought near the ion. What will most likely happen and why?
Answer:
The ion will attract the substance because it has more electrons than protons.
How many moles of S2O8 2– react for every mole of S2O3 2– that reacts? Consider the balanced chemical equations for reactions 1 and 2 to calculate the change in concentration of S2O8 2– , [S2O8 2– ], in this trial. (0.5 pts)
For 1 mole of S₂O₃²⁻ 0.5 mole of S₂O₈²⁻ will be used.
What is a balanced Reaction ?A reaction in which the number of atoms in reactants is equal to the number of atoms in the products is called a balanced reaction.
The reaction given in the question is
S₂O₈²⁻ + 2I⁻ ⇄ 2SO₄²⁻ + I₂
I₂ + 2S₂O₃²⁻ ⇄ 2I⁻ + S₄O₆²⁻
Adding the equation will give balance equation
S₂O₈²⁻ + 2I⁻ + 2S₂O₃²⁻ ⇄ 2SO₄²⁻ + 2I⁻ + S₄O₆²⁻
So x moles of S₂O₈²⁻ require 2x of S₂O₃²⁻
for 1 mole of S₂O₃²⁻ 0.5 mole of S₂O₈²⁻ will be used.
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Please answer this question...
(The question is the attached pic)
Answer: D
Explanation:
When it is an acid, phenolphthalein will be colorless and litmus red.When it is neutral, phenolphthalein will be colorless and litmus will be blue.When it is basic, phenolphthalein will be pink and litmus blue.What are the Result of reaction between , Isoquinoline and alkali KMNO4 ?
Answer:
hydrogen
Explanation:
because it is my own ideal
The pH of acid solution are given below Choose the weakly and solution a. 12.b 6 c
9
Answer:
Explanation:
If you are looking for a weak acid then answer should be b. 6
pH scale goes from 0-14. 0-6 being acid, 7 being neutral, 8-14 being base.
Strong acids are typically low pH like 0-1, since 6 is not in that range it is weak acid.
Option A and C describe base since they are above 7.
A gas mixture (40% CH4, 40% CO, and 20% H2) are burned with 300% excess air where the gas and air
entering the combustion chamber at 25 C. What is the theoretical flame temperature achieved in C
Determine which of the following statements is true.
A. Larger ionic charges in a compound create stronger bonds and higher melting points.
B. Giant covalent structures have low melting and boiling points.
C. lonic bonds are weak and break easily.
D. Giant covalent structures are brittle and shatter when hit
Giant covalent structures are brittle and shatter when hit this statement is true.
Hence, Option D is correct answer.
What is Ionic Bond ?Ionic bonds is a chemical bond formed when one atom transfer its valence electron to another atom. Ionic bond is also called electrovalent bond. These bonds are stronger.
What is Giant Covalent structure ?The 3-D structure of atom which are joined by covalent bond is called giant covalent structure. Giant covalent substances are brittle and they shatter when hit because covalent bond break at once. Giant covalent structure have very high melting and boiling point.
What is Ionic charges ?A larger ionic charges in a compound makes a weaker ionic bond. The larger ions have high melting point.
Thus from the above conclusion we can say that Giant covalent structures are brittle and shatter when hit this statement is true.
Hence, Option D is correct answer.
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4. Which conditions of P, T, and n, respectively, are most ideal?
A) high P, high T, high n
B) low P, low T, low n
C) high P, low T, high n
D) low P, high T, high n
E) low P, high T, low n
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option D that is low P, high T, high n. Ideal gas is a hypothetical gas.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Vanderwaal gas can behave as ideal gas at low pressure and high temperature.
Mathematically, the ideal gas equation can be written as
PV=nRT
where, the symbols have the following meaning
P = pressure of ideal gas
V= volume of ideal gas
n =number of moles of ideal gas
T =temperature of ideal gas
R = Gas constant = 0.0821 L.atm/K.mol
The conditions of P, T, and n that are most ideal are low P, high T, high n.
Therefore, the correct option is option D that is low P, high T, high n.
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10.30 Indicate whether each of the following solutions is acidic,
basic, or neutral:
a. [H3O+] = 6.0 × 10-12 M
Answer:
Basic
Explanation:
The pH scale is measured from 0 to 14.
At the pH scale of 7, a solution is neutral.
Any solution above 7 is basic.
Any solution below 7 is acidic.
Because you have been given the hydronium concentration [H₃O⁺], you can find the pH of the solution using the following formula:
pH = -log[H₃O⁺]
pH = -log(6.0 x 10⁻¹²)
pH = 11.22
As you can see, the solution must be basic because the pH lies within the basic range.
Consider 4.00 L of a gas at 365 mmHg and 20. ∘C . If the container is compressed to 2.80 L and the temperature is increased to 30. ∘C , what is the new pressure, P2 , inside the container? Assume no change in the amount of gas inside the cylinder.
This is an exercise in the General Combined Gas Law.
To start solving this exercise, we obtain the following data:
Data:V₁ = 4.00 lP₁ = 365 mmHgT₁ = 20 °C + 273 = 293 KV₂ = 2,80 lT₂ = 30 °C + 273 = 303 KP₂ = ¿?We apply the following formula:
P₁V₁T₂=P₂V₂T₁ ⇒ General formulaWhere:
P₁=Initial pressureV₁=Initial volumeT₂=end temperatureP₂=end pressureT₂=end temperatureV₁=Initial temperatureWe clear for final pressure (P2)
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{P_{1}V_{1}T_{2}}{V_{2}T_{1}} \ \ \to \ \ \ Formula \end{gathered}$}[/tex]
We substitute our data into the formula:
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{(365 \ mmHg)(4.00 \not{l})(303 \not{K})}{(2.80 \not{l})(293\not{K})} \end{gathered}$}[/tex]
[tex]\large\displaystyle\text{$\begin{gathered}\sf P_{2}=\frac{442380 \ mmHg}{ 820.4 } \end{gathered}$}[/tex]
[tex]\boxed{\large\displaystyle\text{$\begin{gathered}\sf P_{2}=539.224 \ mmHg \end{gathered}$}}[/tex]
Answer: The new canister pressure is 539.224 mmHg.
{ Pisces04 }the element with the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d5 is
Answer:
Mn
Explanation:
Looks like Mn ( Manganese) from the Periodic Table of elements)
there are 25 electrons......25 protons ....atomic number 25 = Mn
the production of olefin
Answer:
Olefin production is a petrochemical process in which saturated hydrocarbons are broken down into smaller, regularly unsaturated ones
13. Use mole ratios to identify the limiting reagent in the following reaction: 3.10 mol of sodium mixes with 4.17 mol of water to form sodium hydroxide and hydrogen gas.
14. Determine the number of excess moles of the excess reagent in the following reaction: 4.80 mol of calcium mixing with 3.55 mol of oxygen gas, making calcium oxide.
13) The limiting reagent is water.
14) Oxyge is in excess by 1.15 mol
Limiting reagent13) According to the equation of the reaction:
[tex]2Na + 2H_2O --- > 2NaOH + H_2[/tex]
The mole ratio of the reactants is 1:1.
But 3.10 mol of sodium and 4.17 mol of water were reacted. Thus, water is in excess while sodium is limiting.
14) [tex]2Ca + O_2 --- > 2CaO[/tex]
Mole ratio of reactants = 2:1
4.80 mol Ca and 3.55 mol oxygen were reacted. Thus, oxygen is in excess.
Excess oxygen = 3.55 - 4.80/2 = 1.15 mol
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Which functional group does the molecule below contain?
HIC H
H=COH
[
Answer:
[tex]D. \ \ \ \text{hydroxyl}[/tex]
Explanation:
Alcohols are organic compounds that are composed of the hydroxyl function group ([tex]-\text{OH}[/tex]), bonded to a carbon atom of an alkyl or a substituted alkyl group. Hence, the functional group of alcohols is the hydroxyl group ([tex]-\text{OH}[/tex]).
According to the International Union of Pure and Applied Chemistry (IUPAC) nomenclature, alcohols are named by changing the -e ending of the name of the parent alkane to the suffix -ol.
For example, the alcohol molecule in the figure demonstrates a hydroxyl group bonded to a methyl group. Therefore, the name of the alcohol is methanol.
Platinum is a shiny metal material. How is this matter classified
Answer:
Noble Metals are found as pure metals becuase they are nonreactive and don't conmbine with other elements to form compounds.
Explanation:
Hope it help :)
What mass of carbon dioxide is produced by the complete combustion of 48.0 g of hexane?
The mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.
How to calculate mass?The mass of a substance can be calculated by using the stoichiometry approach.
The balanced equation of the complete combustion of hexane is as follows:
2C6H14(g) + 19O2(g) → 12CO2(g) + 14H2O(g)
48g of hexane to moles is calculated as:
48g ÷ 86g/mol = 0.56 mol
2 moles of hexane produces 12 moles of CO2
0.56 mol of hexane will produce 0.56 × 12/2 = 3.35 mol
Next, we convert 3.35 moles of CO2 to mass as follows:
3.35 moles × 44g/mol = 147.35g
Therefore, the mass of carbon dioxide produced by the complete combustion of 48.0g of hexane is 147.35g.
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Calculate the mass of 2.11 moles of CF2Cl2. Your answer should be in grams.
HELP PLEASE!!!
Sodium bicarbonate, NaHCO3 ( MW 84.007 g/mol), is commonly known as baking soda. Sodium bicarbonate is a solid crystalline and appears as a white powder. Sodium bicarbonate has a pH of 8.3 at 77 deg F. Sodium bicarbonate can be easily be converted to sodium carbonate, Na2CO3 ( MW 105.988 g/mol) by decomposition to produce H2O and CO2. This can be accomplished by placing the sample in the oven at 176 deg F.
Unbalanced chemical equation:
NaHCO3 (s) + Heat --> Na2CO3 (s) + H20 (g) + CO2 (g)
Write the balanced chemical equation. Calculate yield of the decomposition reaction. Make sure to show your work.
Based on the law of conservation of mass, the expected yield of the decomposition reaction is 100% which is equal to the mass of the reactant.
What mass of products are formed when 1 mole of sodium bicarbonate is decomposed by heat?According to the law of conservation of mass, the mass of products formed when 1 mole of sodium bicarbonate is decomposed by heat will be equal to the mass of one mole of sodium bicarbonate.
The balanced equation of the reaction is given below:
2 NaHCO₃ (s) + Heat --> Na₂CO₃ (s) + H₂0 (g) + CO₂ (g)Molar mass of NaHCO₃ = 84. 0 g/mol
Molar mass of Na₂CO₃ = 106 g/mol
Molar mass of H₂0 = 18 g/mol
Molar mass of CO₂ = 44 g/mol
Based on the mole ratio as given in the equation of reaction,
mass of Na₂CO₃ produced = 1/2 * 106 = 53 g
mass of H₂O produced = 1/2 * 18 = 9 g
Mass of CO₂ produced = 1/2 * 44 g/mol = 22 g
Total mass of products = 53 + 9 + 22 = 84.0 g
Therefore, the yield of the decomposition reaction is equal to the mass of the reactant.
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WHATS THE CORRECT ANSWER ANSWER ASAP FOR BRAINLIST
Answer:
Falling water!Explanation:
Hope this helps
1. Balance, to remove harmful NO gas from the jet exhaust!
_ NH3 + _ NO + _ O2 → _ N2 + _ H2O
2. Balance, to remove harmful NO2 gas from the jet exhaust!
_ NH3 + _ NO2 + _ O2 → _ N2 + _ H2O
The balanced equation are as follows:
4NH3 + 6NO → 5N2 + 6H2O8NH3 + 6NO2 → 7N2 + 12H2OHow to balance chemical reaction?A chemical equation is said to be balanced when the number of moles of each element on both sides of the equation are equal.
According to this question, two equations are given to remove harmful NO and NO2 gases from jet exhaust.
The balanced chemical equations are given below:
4NH3 + 6NO → 5N2 + 6H2O8NH3 + 6NO2 → 7N2 + 12H2OLearn more about balanced equation at: https://brainly.com/question/8062886
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According to the article, puberty indicates the beginning of adolescence. How does nutrition influence the start of adolescence?
Answer:
adolescence begins according to your dietExplanation unhealthy diet brings about early or late commence of adolescence especially in girls
73 m is equal to how many dm?
It requires 334 kJ of heat to melt 1 kg of ice. The largest known iceberg had a volume of about 3.1 x 10^13 m³. How much heat was required
to melt the iceberg if 1 m³ of ice has a mass of 917 kg?
Answer:
3.1×10^13×917= 2842.7×10^13 kg
2842.7×10^13×334=949,461.8×10^13 KJ
Explanation:
First off you convert m³ to kg then convert Kg to Kj
The amount of heat required to melt the iceberg is [tex]9.58 * 10^{18}kJ[/tex]
Latent heat of fusion is the amount of heat required to melt an unit mass of ice.
Mass of iceberg is [tex]3.1*10^{13} m^{3} *917Kg =2.8427*10^{16} Kg[/tex]
Amount of heat required is calculated as:
[tex]2.8427* 10^{16} * 334 =9.58* 10^{18}kJ[/tex]
Hence, the amount of heat required to melt the iceberg is [tex]9.58*10^{18}kJ[/tex]
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WHATS THE CORRECT ANSWER ANSWER ASAP
Solar energy is a non-pollutant, which means it doesn't pollute the environment. so therefore A is the correct answer.
The electron configuration of an element is 1s22s22p63s1.
Describe what most likely happens when an atom of this element comes near an atom having seven valence electrons.
The element is Sodium with an atomic number of 11 and electrovalent bonding takes place when it comes near an atom having seven valence electrons.
What is Electrovalent bonding?This is also referred to as ionic bonding and involves the transfer of atoms of an element to another.
In order for both of them to achieve a stable octet configuration, sodium donates one atom to the element seven valence electrons.
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Answer: A single electron from the outermost shell of this element will move into the outermost shell of the atom with seven electrons.
Explanation:
Which statement is false for the balanced equation given below? (Atomic weights: N = 14.01, H = 1.008, O = 16.00). Explain your answer. 4 NH3 + 5 O2 → 4 NO + 6 H₂O a) The reaction of 4 molecules of NH3 requires 5 molecules 02 b) The reaction of one mole of NH3 requires 40 g of O2 c) The reaction of 4 moles of NH3 produces 30 g of NO d) The reaction of 17 glof NH3 will produce 27 g of water e) The reaction of 10 molecules of NH3 produces 15 molecules of H₂O
The false statement is that the reaction of 17 g of NH3 will produce 27 g of water. (Option D)
What is a balanced reaction equation?A balanced reaction equation is one in which the number of atoms of each element on the right hand side of the equation is equal to the number of atoms of the same element on the left and side of the reaction equation.
The equation of the reaction is 4 NH3 + 5 O2 → 4 NO + 6 H₂O. The number of atoms of each element on both sides are equal.
Hence, the statement that is false from the reaction equation is; "the reaction of 17 g of NH3 will produce 27 g of water".
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Identify the oxidizing and reducing agents in the following: H2S(aq) + Cl2(g) -> S(s) + 2HCI (aq)
The oxidizing and reducing agent in the above redox reaction are hydrogen sulphide (H2S) and Chlorine (Cl) respectively.
What is an oxidizing and reducing agent?An oxidizing agent is any substance that oxidizes, or receives electrons from another substance and as a result, becoming reduced.
On the other hand, a reducing agent is any substance that reduces or donates electrons to another and as a result becomes oxidized.
According to this reaction; H2S(aq) + Cl2(g) -> S(s) + 2HCI (aq)
H2S accepts electrons from Cl2 and becomes reduced to SCl2 donates electrons to H2S and becomes oxidized to HClTherefore, the oxidizing and reducing agent in the above redox reaction are hydrogen sulphide (H2S) and Chlorine (Cl) respectively.
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Tin(IV) sulfide, SnS2, a yellow pigment, can be produced using the following reaction.
SnBr4(aq)+2Na2S(aq)⟶4NaBr(aq)+SnS2(s)
Suppose a student adds 48.1 mL of a 0.478 M solution of SnBr4 to 48.8 mL of a 0.160 M solution of Na2S.
The theoretical yield of [tex]SnS_2[/tex] will be 4.20 grams while the percent yield will be 7.93%
How is yield calculated?From the equation of the reaction, the mole ratio of [tex]SnBr_4[/tex] to [tex]Na_2S[/tex] is 1:2.
Mole of 48.1 mL, 0.478 M [tex]SnBr_4[/tex] = 0.478 x 48.1/100 = 0.023 mols
Mole of 48.8 mL, 0.160 M [tex]Na_2S[/tex] = 0.160 x 48.8/1000 = 0.0078 moles
[tex]SnBr_4[/tex][tex]Na_2S[/tex] is the limiting reactant.
Mole ratio of [tex]SnBr_4[/tex] and [tex]SnS_2[/tex] = 1:1
Equivalent mole of [tex]SnS_2[/tex] = 0.023 moles
Mass of 0.023 noles [tex]SnS_2[/tex]= 0.023 x 182.81 = 4.20 grams
With 0.0333 g of [tex]SnS_2[/tex] recovered, percent yield = 0.333/4.2 x 100 = 7.93%
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Tin(IV) sulfide, SnS2, a yellow pigment, can be produced using the following reaction.
SnBr4(aq)+2Na2S(aq)⟶4NaBr(aq)+SnS2(s)
Suppose a student adds 48.1 mL of a 0.478 M solution of SnBr4 to 48.8 mL of a 0.160 M solution of Na2S.
1) Calculate the theoretical yield of SnS2. ;
2) The student recovers 0.333 g of SnS2. Calculate the percent yield of SnS2 that the student obtained.