be sure to use proper significant figures for all remaining problems. how many grams of nacl are present in…

be sure to use proper significant figures for all remaining problems. how many grams of nacl are present in 350 ml of 0.020 m nacl solution? (remember that 1 mole nacl = 58.44 g/mole.)

be sure to use proper significant figures for all remaining problems. how many grams of nacl are present in 350 ml of 0.020 m nacl solution? (remember that 1 mole nacl = 58.44 g/mole.)

Answer

Answer:

4.1 g

Explanation:

Step1: Convert volume to liters

$V = 350\ mL=350\times10^{- 3}\ L = 0.350\ L$

Step2: Calculate moles of NaCl

$n = M\times V$, where $M = 0.020\ mol/L$ and $V = 0.350\ L$. So $n=0.020\ mol/L\times0.350\ L = 0.0070\ mol$

Step3: Calculate mass of NaCl

$m=n\times M_{r}$, where $n = 0.0070\ mol$ and $M_{r}=58.44\ g/mol$. So $m = 0.0070\ mol\times58.44\ g/mol=0.40908\ g\approx4.1\ g$ (2 significant - figures)