Question

A 2.00 mL of substance A has a density of 18.4 g/mL and a 5.00mL sample of substance B has a density of 35.5 g/mL. Do you have an equal mass of Substances A and B.

Answer 1

Answer:

No, you have more mass of substance B

Explanation:

use d =m/v to find mass

m= d*v

mass A = 18.5 g/mL * 2.00 mL = 37 g

mass B = 35.5 g/mL * 5.00 mL = 177.5 g

Answer 2

No, the substances A and B does not have equal mass. A further explanation is provided below.

Given:

Density,

• D₁ = 18.4 g/mL
• D₂ = 35.5  g/mL

Volume,

• V₁ = 2.00 mL
• V₂ = 5.00 mL

As we know,

→ $Mass = Density\times Volume$

The mass of substance A will be:

→ $m_A = 2.00 \ mL\times 18.4 \ \frac{g}{mL}$

         $= 2.00\times 18.4 \ g$

         $= 36.8 \ g$

The mass of substance B will be:

→ $m_B = 5.00 \ mL\times 35.5 \ \frac{g}{mL}$

         $= 5.00\times 35.5 \ g$

         $= 177.5 \ g$

We can see that $m_A \neq m_B$.

Thus the above response is correct.

         

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