Question

question 8 (1 point) listen if a liquid with a specific gravity of 0.888 has a mass of 5.00 g, calculate the volume. 4.112 ml 4.44 ml 5.888 ml 5.63 ml question 9 (1 point) listen of the following, select all that represent a physical change? a) burning leaves. b) melting candle wax. c) chopping wood. d) recharging a lithium - ion battery. e) souring of milk.

Explanation:

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Question 8

Step1: Find liquid density

Specific gravity = $\frac{\text{Liquid density}}{\text{Water density}}$. Water density = $1\ \text{g/mL}$, so liquid density = $0.888\ \text{g/mL}$.

Step2: Calculate volume from density

Density formula: $
ho = \frac{m}{V}$, rearrange to $V = \frac{m}{
ho}$.
$V = \frac{5.00\ \text{g}}{0.888\ \text{g/mL}}$

Step3: Compute final value

$V = 5.6306... \approx 5.63\ \text{mL}$

A physical change does not alter the chemical composition of a substance:

• a) Burning leaves: Chemical change (combustion forms new substances).
• b) Melting candle wax: Physical change (only state changes from solid to liquid, composition remains wax).
• c) Chopping wood: Physical change (only size/shape changes, composition is still wood).
• d) Recharging a battery: Chemical change (redox reactions alter chemical components).
• e) Souring milk: Chemical change (lactic acid formation changes milk composition).

Answer:

5.63 mL

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Question 9