Question

A) How many grams of H are in 0.45 mol of (C3H5)2S?

B) How many grams of C are in 4.42 g of (C3H5)2S?

C) How many grams of S are in 25.4 g of (C3H5)2S?

Answer #1

A) How many grams of H are in 0.45 mol of (C3H5)2S?

Ans: 1 mole of (C3H5)2S contains 10 moles of H

0.45 mole of (C3H5)2S will contain moles of H

The atomic weight of H is 1 g/mol.

4.5 moles of H corresponds to of H.

B) How many grams of C are in 4.42 g of (C3H5)2S?

The molar mass of

4.42 g of

1 mole of 6 moles of C

0.03877 moles of of C

The atomic mass of C is 12 g/mol.

Mass of C

C) How many grams of S are in 25.4 g of (C3H5)2S?

The molar mass of

25.4 g of

1 mole of 6 moles of C

0.2228 moles of of S

The atomic mass of S is 32 g/mol.

Mass of S

(a) How many grams of CO2 (44.01 g/mol) can be produced by 75.0
g of octane (114.22 g/mol) reacting with sufficient oxygen?
(b) How many grams of O2 (32.00 g/mol) are required for this
reaction?
2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(g)

How many grams of solid NaOH (Mol. Wt. = 40 g mol-1) must be
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9.78)
(A) 79.92 g
(B) 7.992 g
(C) 0.799 g
(D) 0.079 g
(E) 0.008 g

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11.36825 grams
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