Question

when 2 grams of a second sample of lead was converted into lead(ii) chloride the mass of the product was 2,682 g. Calculate RAM of the second sample of lead .(Ar of Cl=35.45).

Answer 1

Answer:

Explanation:

We will use the formula below to answer the question:

atomic weight of element ×number of atoms given by subscript = molar mass

You should have a periodic table available so you can determine the atomic weight of Pb and Cl:

Pb has an atomic weight of 207.2 g/mol

Cl has an atomic weight of 35.45 g/mol

From the chemical formula, we have one Pb atom, so the atomic mass would just be 207.2 g/mol

Next, you have two Cl atoms, so you would multiply the atomic mass of Cl by 2 to obtain an atomic weight of 70.90 g/mol

Now you want to add the mass of each atom together to obtain the molar mass of the entire compound: