The percentage composition of chlorine, by mass, in the compound K2PtCl4 is

To find the percentage composition of chlorine in the compound K2PtCl4, you need to determine the molar mass of chlorine and the molar mass of the entire compound.

1. First, determine the molar mass of chlorine (Cl) by referring to the periodic table. Chlorine has an atomic mass of 35.45 g/mol.

2. Next, determine the molar mass of the entire compound K2PtCl4.
- The molar mass of potassium (K) is 39.10 g/mol.
- The molar mass of platinum (Pt) is 195.08 g/mol.
- Since there are four chlorine atoms in the compound, multiply the molar mass of chlorine by 4: 35.45 g/mol x 4 = 141.80 g/mol.
- Finally, sum up the molar masses of all the elements in the compound: 39.10 g/mol (K) + 195.08 g/mol (Pt) + 141.80 g/mol (4Cl) = 375.98 g/mol.

3. Now, calculate the percentage composition of chlorine in K2PtCl4 using the formula:

(Molar mass of chlorine / Molar mass of K2PtCl4) x 100%

Substituting the values:
(141.80 g/mol / 375.98 g/mol) x 100% = 37.69%

Therefore, the percentage composition of chlorine, by mass, in the compound K2PtCl4 is approximately 37.69%.

To find the percentage composition of chlorine, we need to calculate the mass of chlorine in the compound K2PtCl4 and then divide it by the molar mass of K2PtCl4.

The molar mass of K2PtCl4 can be calculated as follows:
Molar mass of K (potassium) = 39.10 g/mol
Molar mass of Pt (platinum) = 195.08 g/mol
Molar mass of Cl (chlorine) = 35.45 g/mol

Molar mass of K2PtCl4 = (2 x molar mass of K) + molar mass of Pt + (4 x molar mass of Cl)
Molar mass of K2PtCl4 = (2 x 39.10 g/mol) + 195.08 g/mol + (4 x 35.45 g/mol)
Molar mass of K2PtCl4 = 276.28 g/mol

Next, we calculate the mass of chlorine in the compound K2PtCl4:
Mass of chlorine = (4 x molar mass of Cl) = 4 x 35.45 g/mol = 141.80 g

Finally, we can calculate the percentage composition of chlorine in K2PtCl4:
Percentage composition of chlorine = (mass of chlorine / molar mass of K2PtCl4) x 100
Percentage composition of chlorine = (141.80 g / 276.28 g/mol) x 100
Percentage composition of chlorine = 51.36%

Therefore, the percentage composition of chlorine, by mass, in the compound K2PtCl4 is approximately 51.36%.

(4*atomic mass Cl/molar mass K2PtCl4)*100 = ??