こう+ 5に 8 d) NaN3 2 3 +42 =65 E. Al(UH)3 . CHAN,O, 36+ 5t42+ 144こ 247 3. A compound formed from silicon and phosphorus contains 23.2% by mass silicon. What is the empirical formula of the compound? (2)

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c. Al(OH)3
NaN3 2 3 +4265
. CitN,O, 35+ 542+ 4こっ
3. A compound formed from silicon and phosphorus contains 23.2% by mass silicon. What
is the empirical formula of the compound?
(2)
4. Give two examples of a physical change and explain why they are physical changes.
(3)
Meltice ie
and barling wat
Transcribed Image Text:c. Al(OH)3 NaN3 2 3 +4265 . CitN,O, 35+ 542+ 4こっ 3. A compound formed from silicon and phosphorus contains 23.2% by mass silicon. What is the empirical formula of the compound? (2) 4. Give two examples of a physical change and explain why they are physical changes. (3) Meltice ie and barling wat
Expert Solution
Step 1

Given 

% of Si = 23.2 % 

% of P = 100 - 23.2 = 76.8 %

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