Question 23 (3 points) If a piece of aluminum has a density of 2.70 g/mL and its mass is 8.1 g. What is its volume?

The answer is 3.0 mL

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

From the question

mass of aluminum = 8.1 g

density = 2.7 g/mL

It's volume is

We have the final answer as

3.0 mL

Hope this helps you

Ithink it's the third answer

Answer is:     molar solubility of  yttrium fluorid is 4.23·10⁻⁶ m. balanced chemical reaction: yf₃(s)  → y³⁺(aq) + 3f⁻(aq). ksp = 8.62·10⁻²¹. ksp = [y³⁺]  · [f⁻]³.[y³⁺] = [yf₃] = s.[f⁻] = 3[yf₃] = 3s.ksp(yf₃)  = s  · (3s)³.8.62·10⁻²¹ = 27s⁴.s(yf₃)  =  ⁴√(8.62·10⁻²¹  ÷ 27).s(yf₃)  = 0.00000423 m.s(yf₃) = 4.23·10⁻⁶ m.