Question

The formula for density is given by p=m/v where p is density, M is mass and V is volume. If a substance has a mass of 27.82 grams and a volume of 3.6 ml, what is the most accurate density of the substance in g/ml

7.7
7.7278
7.73
0.1

Answer 1

Option 2nd is correct

p = 7.7278 g/ml

Explanation:

Formula for the density is given by:

`p = (m)/(v)` .....[1]

where,

p is the density

m is the mass

v is the volume

As per the statement:

If a substance has a mass of 27.82 grams and a volume of 3.6 ml

⇒
`m = 27.82 g` and
`v = 3.6 ml`

Substitute in [1] we get;

`p = (27.82)/(3.6) = 7.72777778 g/ml`

Therefore, the most accurate density of the substance in g/ml is, 7.7278

Answer 2

p = [27.82] ÷ [3.6]
p = 7.727·
p = 7.728 (3dp)

The answer is B)