Question

Someone please help me with this :,,,,,,,,,,,)

Answer 1

Answer:

1. 1.26823082 mL

2. 0.5 g/mL

Explanation:

The density formula is:$d=\frac{m}{v}$

1.

Rearrange the density formula for v,

$d=\frac{m}{v}$

$d*v=\frac{m}{v}*v$                     Multiply both sides by v.

$d*v=m$

$\frac{d*v}{d} =\frac{m}{d}$                             Divide both sides by d.

$v=\frac{m}{d}$

Volume is found by dividing mass by density. The mass is 20 grams and the density is 15.77 grams per milliliter.

$m= 20 \ g\\d= 15.77 \ g/mL$

Substitute the values into the formula.

$v=\frac{20 \ g} {15.77 \ g/mL}$

Divide. Note the grams, g, will cancel.

$v= 1.26823082 \ mL$

2.

Use the density formula.

$d=\frac{m}{v}$

Density is found by dividing mass by volume. The mass is 10 grams and the volume is 20 milliliters.

$m= 10 \ g\\v= 20 \ mL$

Substitute the values into the formula.

$d=\frac{10 \ g}{ 20 \ mL}$

Divide.

$d= \frac{1}{2} \ g/mL$

$d= 0.5 \ g/mL$