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26 Mar 2023
The answers are D C D B. Can you please show why thats the answer?
19) Which hydrocarbon pair below has identical mass percentage of C? A) C2H4 and C4H2 B) C2H4 and C3H4 C) C3H4 and C3H6 D) C2H4and C3H6 E) none of the above 20) What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? 20) A) NaSO3 B) NaSO C) Na2S203 D) Na2S206 E) NaSO2 21) 21) A compound that is composed of carbon, hydrogen, and oxygen contains 70.6% C, 5.9% H, and 23.5% O by mass. The molecular weight of the compound is 136 amu. What is the molecular formula? A) CgH4O B) C9H120 C) C5H6O2 D) C8HgO2 E) C4H40 22) What is the chemical formula for iron(II) phosphate? 22) A) Fe2PO4 B) Fe3(PO4)2 C) Fe2P D) Fe3P2
The answers are D C D B. Can you please show why thats the answer?
19) Which hydrocarbon pair below has identical mass percentage of C? A) C2H4 and C4H2 B) C2H4 and C3H4 C) C3H4 and C3H6 D) C2H4and C3H6 E) none of the above 20) What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? 20) A) NaSO3 B) NaSO C) Na2S203 D) Na2S206 E) NaSO2 21) 21) A compound that is composed of carbon, hydrogen, and oxygen contains 70.6% C, 5.9% H, and 23.5% O by mass. The molecular weight of the compound is 136 amu. What is the molecular formula? A) CgH4O B) C9H120 C) C5H6O2 D) C8HgO2 E) C4H40 22) What is the chemical formula for iron(II) phosphate? 22) A) Fe2PO4 B) Fe3(PO4)2 C) Fe2P D) Fe3P2
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