3 years ago

Which of the following is evidence for a physical change? A) burning B) fizzing C) evaporating D) rusting

2 answers:

6 0

Answer:c

Explanation: rusting, burning and fuzzing are all examples of chemical reactions/changes.

4 0

The answer is D) rusting
I’m not sure and if it’s wrong I’m so sorry

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Norma-Jean [14]

$2 KHP(aq) + Ba(OH)_{2}(aq) ---> KP_{2}Ba (aq) + 2 H_{2}O (l)$ \

Moles of $Ba(OH)_{2}$ = $0.483 \frac{mol}{L} * 28.5 mL *\frac{1 L}{1000mL} = 0.0138 mol Ba(OH)_{2}$

Mass of KHP = $0.0138 mol Ba(OH)_{2} * \frac{2 mol KHP}{1 mol Ba(OH)_{2}} * \frac{204.22 g KHP}{1mol KHP}$

= 5.64 g KHP

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