Exam 1 Review

They

50

Which of the following atoms has the greatest number of protons? 

a. ¹²C               

b. ¹⁵O

c. ¹⁴C 

d. ¹⁵N

                                   

    

b. ¹⁵O

100

                                               

You have 0.500 g of the following elements: He, Ne, Ar, Kr, Fe. Which sample contains the largest number of atoms?

a. He 

b. Ne 

c. Ar 

d. Kr 

e. Fe

                                   

    

A. He

150

What is the name of the following salt: LiClO?

a. Lithium chloride oxygen

b. Lithium perchlorate

c. Lithium hypochlorite

d. Lithium chloric peroxide

e. Lithium chlorine oxide                                    

    

c. Lithium hypochlorite

200

What is the mass of 5.8 x10¹⁸ atoms of Ne?

a. 9.6x10^-6g

b. 1.9x10^-4g

c. 4.8x10^-7g

d. 5.1x10³g

e. 8.1x10²g                              

    

B. 1.9x10^-4g

250

                                               

The density of silver is 10.5 g/cm3. What is the volume of a piece of Ag that weighs 12.33 g?

a. 0.48 cm³

b. 1.17 cm³

c. 4.8x10-2 cm³

d. 2.14 cm³

e. 1.1 cm³

                                   

    

B. 1.17 cm³

are

50

What charge is most commonly observed for a calcium ion? 

a. 2- 

b. 1- 

c. 1+ 

d. 2+

d. 2+

100

What is the name of this compound P₄O₁₀? 

a. phosphorus (V) oxide     

b. tetraphosphorus decaoxide                

c. phosphorus decaoxygen                  

d. tetraphosphorus (V) oxide                  

e. tetraphosphorus oxide                                   

                        

    

B. tetraphosphorus decaoxide      

150

                                               

What is the formula for chromium (II) sulfide? 

a. CrSO₄

b. CrO

c. CrSO₃

d. CrS

e. Cr₂S

                                   

    

d. CrS

200

What is the mass of 0.442 mol Fe?

a. 7.91x10^-3 g

b. 24.7 g

c. 4.05 x 10^-2 g

d. 126 g

e. 55.85 g

B. 24.7 g

250

Which of the following statements are correct.

1. The attractive forces between ions of opposite charges increase with increasing separation. 

2. The greater the charges on ions, the greater the attractive forces between ions. 

3. Ions combine to form small molecules, such as NaCl

    

2 only

all

50

What charge is most commonly observed for a sulfide ion? 

a. 3-

b. 2-

c. 2+

d. 1-

e. 1+ 

B. 2-

100

What is the formula for sodium cyanide? 

a. SoCy

b. NaN

c. NaCN

d. NaCO₃

e. NaCO₂

c. NaCN

150

What is the name of Mg(OH)₂?

a. magnesium oxide

b. magnesium dihydroxide

c. magnesium hydroxide

d. magnesium (II) hydroxide

c. magnesium hydroxide

200

Calculate the moles present in 10.5 g of calcium carbonate ?

a. 0.105 mol

b. 0.410 mol

c. 9.53 mol

d. 1.05 x 10³ mol

a. 0.105 mol

250

How many oxygen atoms are in 0.20 g CO₂?

a. 2.4x10²³ oxygen atoms

b. 2.7x10²¹ oxygen atoms

c. 5.5x10²¹ oxygen atoms

d. 1.2x10²³ oxygen atoms

c. 5.5x10²¹ oxygen atoms

Random

50

What is the formula for aluminum chloride? 

a. AlCl

b. AlCl₂

c. AlCl₃

d. Al₂Cl₃

c. AlCl₃

100

What is the formula for manganese (III) oxide? 

a. MnO₂

b. MnO

c. Mg₂O₃

d. Mn₂O₃

e. MgO

c. Mg₂O₃

150

What is the molecule formula for silicon dioxide?

a. SiO

b. Si₂O

c. SiO₂

d. (SiO)₂

c. SiO₂

200

Determine the mass of 0.350 mol sodium phosphate? 

a. 2.14x10^-3 g

b. 0.0174 g

c. 57.4 g

d. 163.9 g

c. 57.4 g

250

What is the mass percent of oxygen in acetic acid, CH₃COOH? 

a. 26.64%

b. 46.72%

c. 53.29%

d. 73.36%

                                   

    

c. 53.29%

Module 4

50

                                               

Balance the following chemical equation: CH3OH(

                                               

Balance the following chemical equation: CH₃OH(g) + O₂(g) → CO₂(g) + H₂O(g)

                                   

    

) + O2(g) → CO2(g) + H2O(g)

                                   

    

2CH₃OH(g) + 3O₂(g) → 2CO₂(g) + 4H₂O(g)

100

What amount of sodium (in moles) reacts with 1.5 moles of fluorine gas? 

Na(s) + F₂(g) --> NaF(s)

a. 0.75 mol

b. 1.5 mol

c. 3.0 mol

d. 6.0 mol

c. 3.0 mol

150

What amount of ammonia (in moles) is produced by the reaction of 4.00 mol H₂ with 3.00 mol N₂? 

3H₂(g) + N₂(g) --> 2NH₃(g)

a. 2.67 mol

b. 2.00 mol

c. 6.00 mol

d. 7.00 mol

a. 2.67 mol

200

The decomposition of 3.32 g CaCO₃ yields 1.24 g CaO. What is the percent yield of this reaction? 

CaCO₃(s) → CaO(s) + CO₂(g)

a. 1.86%

b. 37.3%

c. 62.7%

d. 66.7%                                   

    

d. 66.7%                                   

250

Benzene, an organic solvent, has the empirical formula CH. If the molar mass of benzene is 78.11 g/mol, what is the molecular formula of benzene?

a. C₄H₃₀

b. C₅H₁₈    

c. C₆H₆ 

d. C₇H₈                     

    

c. C₆H₆