# Chemical Quantities and Calculations - All the question in the photograph please?

Feb 14, 2017

Sorry, but Socratic is not a Homework answering service. Here are the answers to the questions in your first image.

#### Explanation:

1 a)

${\text{Volume" = 500 color(red)(cancel(color(black)("cm"^3))) × "1 dm"^3/(1000 color(red)(cancel(color(black)("cm"^3)))) = "0.5 dm}}^{3}$

$\text{Moles" = 1 color(red)(cancel(color(black)("dm"^3)))× "2 mol"/(1 color(red)(cancel(color(black)("dm"^3)))) = "1 mol}$

1 b)

$\text{Moles" = 2 color(red)(cancel(color(black)("L"))) × "0.5 mol"/(1 color(red)(cancel(color(black)("L")))) = "1 mol}$

2 a)

${\text{Concentration" = "4 mol"/("2 dm"^3) = "2 mol/dm}}^{3}$

2 b)

${\text{Volume" = 200 color(red)(cancel(color(black)("cm"^3))) × ("1 dm"^3)/(1000 color(red)(cancel(color(black)("cm"^3)))) = "0.2 dm}}^{3}$

${\text{Concentration" = "0.3 mol"/"0.2 dm"^3 = "1.5 mol/dm}}^{3}$