Answer:
Burning of the candle is both physical and chemical change. Burning of the candle melts the wax and hence physical state of wax has changed from solid to liquid.
Again the wax combines with the atmospheric oxygen and changes to carbon dioxide, heat and light.
Thus both the changes are accompanied by the burning of the candle.
Explanation:
hope this helps!
~mina
The numbers in the powers are the number of electrons in a specific orbital. so you can add them to find the atomic number
Answer:
5 H atoms per NH4OH
Explanation:
5NH4OH
NH4OH is a chemical formula. It has 5 H atoms per each molecule. NH<em><u>4</u></em>O<em><u>H</u></em>
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5NH4OH means 5 molecules (or moles) of NH4OH. But the question asks per chemical formula, so 5 is correct,
There would be 5x4 or 20 atoms of H is 5 molecules of NH4OH.
need 0.500 x 0.125 = 0.0625 moles of NaOH. The molecular weight is 23+16+1 = 40, so 0.0625 x 40 = 2.5 grams will do the trick.
