Transcript The formula for oxalic acid is (COOH)2. How many atoms does each

The formula for oxalic acid is (COOH)2. How
many atoms does each molecule contain?
1.
2.
3.
4.
5.
6
4
8
10
5
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What is the molecular formula
for acetic acid?
1.
2.
3.
4.
5.
CH3COOH
CH3COCH3
CH3CH2OH
CH3CH2CO2H
CH3CH2OCH2CH3
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What is the formula for iron(III)
oxide?
1.
2.
3.
4.
5.
FeO3
FeO2
Fe3O2
Fe2O3
Fe3O
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
Choose the name-formula pair
that does not correctly match.
1. magnesium phosphate
Mg3(PO4)2
2. ferrous sulfite FeSO3
3. silver carbonate AgCO3
4. potassium fluoride KF
5. cupric bromide CuBr2
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
If 6.653 g of calcium combines exactly with 26.53 g of
bromine and 12.29 g of zinc combines exactly with 30.04 g of
bromine, what is the mass ratio of one atom of calcium to one
atom of zinc?
1.
2.
3.
4.
5.
1.68
0.613
0.541
1.85
0.133
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
Calculate the number of atoms in
40.5 g of aluminum.
1.
2.
3.
4.
5.
900
2.5 x 10-24
9.0 x 1023
6.6 x 1026
1.8 x 10-21
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What is the formula weight of
Fe(NH4)2(SO4)2•6H2O?
1.
2.
3.
4.
5.
392 amu
384 amu
412 amu
376 amu
436 amu
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
How many atoms of hydrogen
are there in 88 g of C6H6?
1.
2.
3.
4.
5.
3.6 x 1023
6.8 x 1022
2.6 x 1023
4.1 x 1024
5.3 x 1023
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
How many hydrogen atoms are present in
7.50 g of (NH4)2Fe(SO4)2•6H2O?
1.
2.
3.
4.
5.
5.16 x 1022
2.30 x 1023
1.15 x 1022
4.65 x 1023
3.35 x 1024
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
Calculate the percent
composition of FeSO4.
1.
2.
3.
4.
5.
%Fe = 27.9%, %S = 24.1,
%O = 48.0%
%Fe = 16.2% , %S = 27.9%,
%O = 55.8%
%Fe = 33.2% , S = 9.5% ,
%O = 57.2%
%Fe = 36.8%, S = 21.1%,
%O = 42.1%
%Fe = 25.1%, %S = 21.6% ,
%O = 53.2%
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What would be the empirical formula for a
compound containing 33.36% calcium,
26.69% sulfur, and 39.95% oxygen?
1.
2.
3.
4.
5.
CaSO4
CaSO2
CaSO
CaSO3
Ca2S2O5
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
The complete combustion of a hydrocarbon
produced 352 mg of CO2 and 216 mg of H2O. What
is the simplest formula of this hydrocarbon?
1.
2.
3.
4.
5.
CH
CH
C2H3
CH3
C3H2
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
The complete combustion of a hydrocarbon produced 26.4 g
of CO2 and 5.40 g of H2O. Another experiment determined
the molecular weight of this hydrocarbon to be approximately
52 g/mol. What is its molecular formula?
1.
2.
3.
4.
5.
C2H4
CH
C4H4
C2H2
CH4
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What mass of lead is present in 5.05 kg
of mendipite, PbCl2•2PbO?
1.
2.
3.
4.
5.
2.89 kg
4.05 kg
5.05 kg
3.68 kg
4.33 kg
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40
What mass of fluorine is contained in 2.00 tons of
cryolite that is 42.0% pure Na3A1F6? (No other
compounds containing fluorine are present.)
1.
2.
3.
4.
5.
912 lb
832 lb
456 lb
304 lb
152 lb
20% 20% 20% 20% 20%
1
2
3
4
5
6
7
8
9
10
11
12
113
14
21
22
23
24
25
26
27
28
29
30
31
32
33
34
41
42
43
44
45
46
47
48
49
50
2
15
16
3
17
418
19
35
36
37
38
39
5
20
40