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marly Design Layout Tell me what you want to do T Normal 1 No Spa.. Heading Heading2TaleSubtite Subtle E.. Emphasis Inense Strg Styles 1. What is the molarity of a 0.50 L sample of solution that contains 80.0 g of sodium hydroxide (FM 39.997 g/mol)? Which of the following sets of tools would give the most precise measurements for calculating the density of an irregularly shaped object? 2. Imole of NaNOs(s) is dissolved in water to form a solution. Which of the following best represents the nature of the resulting solution when sodium nitrate dissolves in water? Question 15 options: c A) The solution contains l mole Na, 1 mole N, and 3 moles? a C B) The solution contains 1 mole Na, 1 mole N, and 3 moles O2 C C) The solution contains 1 mole Nar and 1 mole NOs C D) The solution contains 1 mole Nat and 1 mole NOs C E) The solution contains 1 mole NaNO

Explanation / Answer

1)

mass, m = 80.0 g

use:
number of mol,
n = mass/molar mass
=(80.0 g)/(39.997 g/mol)
= 2.0 mol

volume , V = 0.50 L


use:
Molarity,
M = number of mol / volume in L
= 2.0/0.5
= 4.0 M
Answer: 4.0 M

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