Question

QUICK PLEASE

Answer 1

Answer: 2.52 M

Explanation:

The product of molarity (moles/litre) and volume in litres yields moles, and the numbers of moles in two solutions means dilute and concentrated are equal, which is expressed by the following equation: 

$M_1V_1=M_2V_2$

$Given that\\M 1=12.0 \mathrm{M} or mole / \mathrm{L} \\ \mathrm{V} 1=420 \mathrm{ml} \\ \mathrm{M} 2= ?\\ \mathrm{V} 2=2.0 \mathrm{~L} or 2000 \mathrm{ml} \\\\ \mathrm{M} 1 \mathrm{~V} 1=\mathrm{M} 2 \mathrm{~V} 2 \\ \mathrm{M} 2=\mathrm{M} 1 \mathrm{~V} 1 / \mathrm{V} 2 \\ =12.0 * 420 / 2000 \\ =2.52 \ \mathrm{M}$