Part A 1.73 mol of LiCl in 30.4 L of solution Express your answer using three si

Question

Part A 1.73 mol of LiCl in 30.4 L of solution Express your answer using three significant figures.

Part B 0.106 mol of LiNO3 in 6.8 L of solution Express your answer using two significant figures.

Part C 0.0376 mol of glucose in 76.7 mL of solution Express your answer using three significant figures.

Part D Gastric acid pH can range from 1 to 4, and most of the acid is HCl. For a sample of stomach acid that is 3.16×102 M in HCl, how many moles of HCl are in 17.0 mL of the stomach acid? Express the amount to three significant figures and include the appropriate units.

Explanation / Answer

Part A 1.73 mol of LiCl in 30.4 L of solution Express your answer using three significant figures.

M = mol/V

M = 1.73/(30.4) = 0.056907 M

Part B 0.106 mol of LiNO3 in 6.8 L of solution Express your answer using two significant figures.

M = mol/V

M = 0.106/6.8

M = 0.01558 M

Part C 0.0376 mol of glucose in 76.7 mL of solution Express your answer using three significant figures.

M = mol/V

M = (0.0376)/(76.7*10^-3) = 0.4902 M

Part D Gastric acid pH can range from 1 to 4, and most of the acid is HCl. For a sample of stomach acid that is 3.16×102 M in HCl, how many moles of HCl are in 17.0 mL of the stomach acid? Express the amount to three significant figures and include the appropriate units.

V = 17 mL = 17*10^-3 M

mol = MV = (3.16*10^-2(17*10^-3) = 0.0005372 mol -- >5.37¨*10^-4 mol of HCl

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