Question: Can someone help me to answer this correctly, please, and explain it. Please answer these 3 short questions, I don't have more money to buy

Can someone help me to answer this correctly, please, and explain it. Please answer these 3 short questions, I don't have more money to buy more questions. These 3 questions are different.

1. a.

Can someone help me to answer this correctly, please, and explain it.

1. b.

Please answer these 3 short questions, I don't have more money to

1. c.

buy more questions. These 3 questions are different. 1. a. 1. b.

The percent by mass of potassium in KNO2 is %. The percent by mass of oxygen in C5H12O is % (Enter your answer to four significant figures.) Calculate the percentage composition for PCl3. Mass percentage of phosphorus = % Mass percentage of chlorine = %

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