I need help with this question--Chemisrty converions?

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I need help with this question--Chemisrty converions?

Calculate the percentage of mass of chlorine in PtCL2(NH3)2

2007-02-09 20:46:02 · 2 answers · asked by ChristFirst00 2 in Science & Mathematics ➔ Chemistry

2 answers

Get the atomic weights of each of the elements in the compound and multiply each one by the number of elements (not forgetting that there are 2Cl, 2N and 6H) then divide the weight of 2Cl by the TOTAL weight and multiply by 100.

2007-02-09 20:50:43 · answer #1 · answered by JJ 7 · 0⤊ 0⤋

Step 1. Total mass in 1 mol of PtCL2(NH3)2

1 x Molar mass of Pt + 2 x Molar mass of Cl + 2 x ( Molar mass of N + 3 x molar mass of H)
= 195.09 + 2 x 35.453 + 2 x (14 + 3 x 1.01) = 300.056 grams

Step 2. Mass of Chlorine

2 x Molar mass of Cl = 2 x 35.453 = 70.906 grams

Step 3. percentage

70.906 / 300.056 = 0.24 or 24%

2007-02-10 04:52:22 · answer #2 · answered by The Answerer 3 · 0⤊ 0⤋