Chemistry, asked by sheranie6487, 2 days ago

Prove that 4.8 g of magnesium contains the same number of atoms as 13.0 g of zinc. [Relative atomic mass: Mg = 24, Zn = 65; Avogadro constant = 6.02 x 10²³ mol-¹ ]​

Answers

Answered by poorvajakupendira
1

Answer:

How many moles of potassium (K) atoms are in 3.04 grams of pure potassium metal?

Solution

In this example, multiply the mass of K by the conversion factor (inverse molar mass of potassium):

1molK39.10gramsK

39.10 grams is the molar mass of one mole of K; cancel out grams, leaving the moles of K:

3.04gK⎛⎝1molK39.10gK⎞⎠=0.0778molK

Similarly, if the moles of a substance are known, the number grams in the substance can be determined. Converting moles of a substance to grams requires a conversion factor of molar mass of substance/one mole of substance. One simply needs to follow the same method but in the opposite direction.

Explanation:

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