Ch 10 Quantities Chemistry

1.

1 point

Calculate the percent composition when 13.3 g Fe combine completely with 5.7 g O.

65% Fe and 35% O

30% Fe and 70% O

70%Fe and 30%O

35% Fe and 65% O

2.

1 point

Table sugar, or sucrose, has the chemical formula C12H22O11. How many atoms are in 1.00 mol of sucrose?

2.71 x 10 to the twentyfourth power

2.71 x 10 to the twentythird power

2.71 x 10 to the twentyfifth power

2.71 x 10 to the twentysecond power

3.

1 point

Which contains more molecules: 1.00 mol H2O2, 1.00 mol C2H6, or 1.00 mol CO?

1.00 mol CO

1.00 mol C2H6

the all contain the same number of molecules

1.00 mol H2O2

4.

1 point

Calculate the mass of 1.00 mol of silicon dioxide.

58.1 g/mol

60.1 g/mol

62,56 g/mol

64.9 g/mol

5.

1 point

How many moles are in 2.41 x 10 to the 24th formula units of NaCl.

4.12 mol NaCl

4.54 mol NaCl

5.12 mol NaCl

4.00 mol NaCl

6.

1 point

How many hydrogen atoms are in a representative particle of (NH4)2 HPO4?

12

9

6

2

7.

1 point

How many moles is in 9.03 x 10 to the 24th atoms of Hg?

12.0 mol Hg

15.0 mol Hg

16.01 mol Hg

13.9 mol Hg

8.

1 point

Calculate the percent composition of H2S.

5.9% H, 94.1%S

6.4% H, 93.9%S

94.1% H, 5.9%S

93.9% H, 6.4%S

9.

1 point

Calculate the molar mass of N2O3?

76.0g

84.0g

67.0g

48.0g

10.

1 point

Calculate the molar mass of N2O3

84.0 g/mol

67.0 g/mol

76.0 g/mol

27.0 g/mol

11.

1 point

Find the mass of 14.4 mol F2.

38.0 g F2

547 g F2

524 g F2

19.0 g F2

12.

1 point

Find the mass of 1.50 mol C5H12

101g

98g

112g

108g

13.

1 point

Calculate the molar mass of H3PO4?

92.0 g

101.2 g

98.0 g

102 g

14.

1 point

Calculate the percent composition of (NH4)2 C2O4

18.6% N; 6.5%H; 19.4% C; 51.6%O

22.6% N; 6.5%H; 17.4% C; 53.6%O

20.6% N; 8.5%H; 19.4% C; 51.6%O

22.6% N; 6.5%H; 19.4% C; 51.6%O

15.

1 point

How many moles is in 0.0688g silver chloride?

4.99 x 10 to the -4 mol AgCl

2.80 x 10 to the -4 mol AgCl

4.80 x 10 to the -4 mol AgCl

4.96 x 10 to the -4 mol AgCl

16.

1 point

How may hydrogen atoms are in a representative particle of Al(OH)3?

1

2

3

4

17.

1 point

How many atoms of O are in 3.65 mol of sucrose?, C12H22O11?

2.42 x 10 to the twenty fourth power O atoms

2.42 x 10 to the twenty fifth power O atoms

2.42 x 10 to the twenty second power O atoms

2.42 x 10 to the twenty third power O atoms

18.

1 point

How many moles are in 15.5g silicon oxide?

.580 mol SiO2

0.221 mol SiO2

0.258 mol SiO2

.85 mol Si02

19.

1 point

How many hydrogen atoms are in a representative particle of C4H10O?

10

4

2

6.02 x 10 to the 23rd

20.

1 point

Calculate the percent composition of (NH4)2 C2O4

22.6% N; 6.5%H; 19.4% C; 51.6%O

22.6% N; 6.5%H; 17.4% C; 53.6%O

18.6% N; 6.5%H; 19.4% C; 51.6%O

20.6% N; 8.5%H; 19.4% C; 51.6%O