Question

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

Answer 1

1. 1.26823082 mL

2. 0.5 g/mL

Step-by-step explanation:

The density formula is:
`d=(m)/(v)`

1.

Rearrange the density formula for v,

`d=(m)/(v)`

`d*v=(m)/(v)*v` Multiply both sides by v.

`d*v=m`

`(d*v)/(d) =(m)/(d)` Divide both sides by d.

`v=(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=(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=(10 \ g)/( 20 \ mL)`

Divide.

`d= (1)/(2) \ g/mL`

`d= 0.5 \ g/mL`