Which has more number of atoms? 100g of Ca (Calcium) or 100g of Al (Aluminium)?
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Which has more number of atoms? 100g of Ca (Calcium) or 100g of Al (Aluminium)?
Which has more number of atoms? 100g of Ca (Calcium) or 100g of Al (Aluminium)?
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Answer:
Aluminium.
Explanation:
for this problem, you need the avogadro number. it's a constant. the avogadro number tells you how many particles there are in a mole. that's why a mole is called the chemists dozen. 1 mole = 6.02 x 10^23, which is the avogadro number.
n(amound of moles)=m(mass) / mw(molecular weight)
before calculating, you also need the molecular weights of calcium and aluminum.
the molecular weight of ca= 40.078
the molecular weight of al=26.98
now put the values in the formula, don't forget to round them up.
n=100/40.078=2.49513449=2.5
n=100/26.98=3.70644922=3.7
Al is higher in the moles, so that's your answer.