Chapter 7

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

In a ________ reaction, two or more elements or compounds form one product

combination

The reaction of carbon with oxygen to produce carbon monoxide is an example of which class of reaction

combination

What is the classification for this reaction SO3 + H2O --> H2SO4

combination

The following reaction is an example of a _______ reaction C5H8 + 7O2 --> 5CO2 + 4H2O

combustion

The _________ is the energy difference between reactants and products in a chemical reaction

heat of reaction

If the reaction shown below is exothermic, the energy level of the reactants is ________. H2 + O2 → 2H2O

higher than that of the products

In an oxidization-reduction reaction, the substance oxidized always

loses electrons

What is the classification for this unbalanced reaction Fe + HCl --> FeCl3 + H2

single replacement

A chemical equation is balanced when

the number of atoms of each element is the same in reactants and products

In any balanced chemical equation, the number of each type of atom on both sides of the equation is

the same

3.00 moles of NO2 have a mass of

138g

What is the molar mass of copper (II) sulfate, CuSO4

159.6 g/mole

What is the molar mass of sodium phosphate, Na3PO4

163.9 g/mole

How many grams are NO are required to produce 145g of N2 in the following reaction 4NH3 + 6NO --> 5N2 + 6H2O

186g

In this reaction what is the correct coefficient for sodium chloride Pb(NO3)2 + ? NaCl --> PbCl2 + ? NaNo3

2

Gven the following equation, what is the correct form of the conversion factor needed to convert the number of moles of O2 to the number of moles of Fe2O3 produced 4Fe + 3O2 --> 2Fe2O3

2 moles Fe2O3/3 moles O2

One mole of copper (II) sulfate, CuSO4, contains_________ O atoms

2.41x10 to the 24th

0.400 mole of sucrose, C12H22O11, contains __________ C atoms

2.89x10 to the 24th

One mole of neon atoms has a mass of

20.18 g

How many grams of K2SO4 are there in 0.123 mole of K2SO4

21.4g

What is the molar mass of Mg3(PO4)2, a substance formerly used in medicine as an antacid

262.9 g/mole

Which of the following gives the balanced equation for this reaction K3PO4 + Ca(NO3)2 --> Ca3(PO4)2 + KNO3

2K3PO4 + 3Ca(NO3)2 --> Ca3(PO4)2 + 6KNO3

For the following reaction, what is the correct coefficient for H2 Fe + HCl --> FeCl3 + H2

3

What is the coefficient of hydrogen, H2, when the following equation is balanced Al + H2SO4 --> Al2(SO4)3 + ? H2

3

The molar mass of potassium is

39.10 g/mole

One mole of copper (II) sulfate, CuSO4, contains _________ moles of O

4

When 4 moles of aluminum are allowed to react with an excess of chlorine gas, Cl2, how many moles of aluminum chloride are produced 2Al + 3Cl2 --> 2AlCl3

4 moles

How many moles of water are present in 75.0 g of H2O

4.16 moles

0.400 mole of sucrose, C12H22O11, contains _________ moles of C

4.80

One mole of particles of any substance contains how many particles?

6.02x10 to the 23rd particles

Find the mass of AlCl3 that is produced when 25.0 g of Al2O3 reacts with HCl according to the following equation

65.3g

The molar mass of calcium hydroxide is, Ca(OH)2 is

74.10 g/mole

The molar mass of C3H8O2 is

76.09 g/mole

How many grams of Fe2O3 are there in 5.00 mole of Fe2O3

79.9g

In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below. AgNO3 + NaCl → AgCl + NaNO3

84.4 g

How many grams of CO2 are produced from 125 g of O2 and excess CH4 CH4 + 202 --> CO2 + 2H2O

85.9g

The _______ is the minimum energy needed for a chemical reaction to begin

activation energy

How many moles of carbon atoms are there in 0.500 mole of C2H6

1.00 mole

How many moles of K2SO4 are in 15.0 g of K2SO4

0.0861 moles

How many grams of hydrogen are needed to produce 1.80 g of water according to this equation 2H2 + O2 --> 2H2O

0.201 g

0.100 mole of lithium has a mass of

0.694 g

Which of the following correctly gives the correct coefficients for the reaction below N2H4 + H2O2 --> N2 + H2O

1, 2, 1, 4

What is oxidized and what is reduced in the following reaction 2Al + 3Br2 --> 2AlBr3

Al is oxidized and Br2 is reduced

Avogrado's number is the number of grams in a mole

False

The molar mass of chlorine has is 35.45 g/mole

False

The molar mass of copper (II) chloride is 134.5 g/mole

False

The molar mass of silver is 47 g/mole

False

Avogadro's number is the number of

Particles in 1 mole of a substance

The mass of 0.352 mole of sodium chloride is 20.6 g

True

The molar mass of magnesium is 24.31 g/mole

True

The molar mass of water is 18.02 g

True

The following reaction takes place when an electric current is passed through water. It is an example of a __________ reaction

decomposition

Any reaction that absorbs 150 kcal of energy can be classified as ________.

endothermic

A reaction that releases energy as it occurs is classified as a(n)

exothermic reaction

What type of reaction is CH4 + 2O2 --> CO2 + 2H2O + 218 kcal

exothermic reaction

In an oxidization-reduction reaction, the substance reduced always

gain electrons


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