Question

HELP ASAP PLEASE! THIS IS FOR STUDY ISLAND

Answer 1

Answer:

Copper

Explanation:

Given parameters:

Mass of metal = 25g

Volume of metal = 2.83cm³

Unknown:

Density of the metal  = ?

Solution:

Density is the mass unit volume of a substance. To solve this problem, use the mathematical expression below;

   Density  = $\frac{mass}{volume}$

mass is the amount of substance in the metal

volume is the space occupied by the metal

 Now solve;

    Density  = $\frac{25}{2.83}$   = 8.83g/cm³

The metal is Copper

Answer 2

Answer:

lead

Explanation:

Density (D) is calculated by dividing the mass (m) of the substance by its volume(v):

D = m/v

11.34 g/cm3 = 8.96 g / 0.79 cm3

To find the identity of a substance, compare the calculated density to the values listed in the table. A sample with a density of 11.34 g/cm3 would be lead.