Chemistry, Unit 8, Assignment 1: Chemist's Toolbox

What is the atomic mass of one mole of H?

1.008 g/mole

What is the atomic mass of one mole of O?

16.00 g/mole

What is the molecular weight of one mole of H2O?

18.016 g/mole

Solutions are formed by_____.

2 or more compounds

Balance this chemical equation. Choose "blank" for the box if no other coefficient is needed. Writing the symbol implies "1." ______ H2O2 → _______ H2O + _______ O2

2, 2, blank

Balance this chemical equation. Choose "blank" for the box if no other coefficient is needed. Writing the symbol implies "1." ______ HCl + ______ Zn → ______ ZnCl2 + ______ H2

2, blank, blank, blank

What is the atomic mass of one mole of Na?

22.99 g/mole

N2 + 3H2 2NH3 How many molecules of H2 are represented in the reaction? How many nitrogen atoms are represented in the reactants? How many moles of NH3 are formed?

3, 2, 2

Balance this chemical equation. Choose "blank" for the box if no other coefficient is needed. Writing the symbol implies "1." _____ NH4OH + ______ AlCl3 → _______ Al(OH)3 + ______ NH4Cl

3, blank, blank, 3

Balance this chemical equation. Choose "blank" for the box if no other coefficient is needed. Writing the symbol implies "1." _______ Al + ______ O2 → ________ Al2O3

4, 3, 2,

3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many oxygen atoms are found in the products? How many moles of Fe3O4 are formed? What is the ratio of the number of moles of Fe atoms to the moles of H2O molecules? How many hydrogen atoms are found in the reactants?

4, 4, 1, 3/4, 8

Which of the following statements is not correct?

4.1 moles Li2O = 94 g

What is the molecular weight of one mole of H2CO3?

62.026 g/mole

Look at the following reaction. Select the option that best applies to the reaction. 8Fe + Se ⇌ 8FeS

Nine moles of reactants form eight moles of product.

Look at the following reaction. Select the option that best applies to the reaction. 2KClO3 ⇌ 2KCl + 3O2

The number of atoms is the product is the same number of atoms in the reactant.

Look at the following reaction. Select the option that best applies to the reaction. 2KClO3 ⇌ 2KCl + 3O2

There are more molecules of product than reactant.

Which statement is true about 0.25 mole of O2 and 0.25 mole of NH3 ?

They both have the same number of molecules.

Look at the following reaction. Select the option that best applies to the reaction. 2KClO3 ⇌ 2KCl + 3O2

Two moles of KClO3 decompose to form 5 moles of product.

The following are properties of compounds _____.

all of the above (vapor pressure, density, boiling point)

Equilibrium systems_____.

exist throughout nature

A mole of the element U (uranium) and a mole of CO2:

have an equal number of particles

Select all that apply. At STP conditions, 0.25 mole of CO2(g), H2(g), and NH3(g):

will contain the same number of molecules will occupy the same volume