Question

question 3 (2 points)
how many grams of nacl are there in 2.00 l of a 2.00 m solution? the molar mass of nacl is 58.44 g/mol.
first we get the moles
1 mol
(2 l)(----------) = 3 mol
4 l
then we convert into grams
5 g
(6 mol)(---------) = 7 g
8 mol
a. 0 b. 1 c. 2 d. 3 e. 4 f. 5
g. 6 h. 234 i. 58.44 j. 100. k. 1.71
l. 0.856 m. 10.0

Explanation:

Step1: Calculate the moles of NaCl

The formula for molarity \(M=\frac{n}{V}\) (where \(n\) is moles and \(V\) is volume in liters). Rearranging for \(n\), we have \(n = M\times V\). Given \(M = 2.00\space mol/L\) and \(V=2.00\space L\).
\(n=(2.00\space L)\times(2.00\space mol/L)\)

Step2: Convert moles to grams

The formula for mass \(m=n\times M_m\) (where \(M_m\) is molar mass). Given \(n = 4.00\space mol\) (from step 1) and \(M_m=58.44\space g/mol\)
\(m=(4.00\space mol)\times(58.44\space g/mol)\)

Answer:

1. \(4\) (from \(2.00\times2.00\)), 2. \(2\), 3. \(4\), 4. \(1\), 5. \(58.44\), 6. \(4\), 7. \(234\) (from \(4\times58.44 = 233.76\approx234\)), 8. \(1\)