19. How many liters of a 0.250 M solution of glucose contain 0.300 mol of glucos

Question

19.

How many liters of a 0.250 M solution of glucose contain 0.300 mol of glucose?

8.3 L

0.75 L

1.20 L

7.5 L

0.83 L

18. How many grams of sodium chloride are contained in 3.00 L of a 2.00 M solution of sodium chloride?

39.0 g

351 g

168 g

87.8 g

6.00 g

16. How many moles of water will be made from the reaction of 3 moles of elemental hydrogen

(H2) with 3 moles of elemental oxygen (O2)?

4.5 moles of water

3 moles of water

6 moles of water

9 moles of water

1.5 moles of water

8.3 L

0.75 L

1.20 L

7.5 L

0.83 L

Explanation / Answer

19.

M = mol/V

V = mol/M = 0.3/0.25

V = 1.2 L

18.

M = mol/V

mol = MV = 3*2 = 6 mol

mass = mol*Mw = 6*58 = 348 mol

16.

H2 + O2 = H2O

balance

2H2 + O2 = 2H2O

3:3 ratio so

3 mol of H2 react to form 3 mol of water

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