Which of the following describes 44.0 g of propane, C_3H_8? (Select all that app

Question

Which of the following describes 44.0 g of propane, C_3H_8? (Select all that apply) A. The amount of propane that contains 1.0 g of hydrogen. B. One mole of propane. C. The amount of propane that contains 8 times 6.02 times 10^23 H_2 molecules. D. The amount of propane that contains 36.0 g of carbon. Which of the following samples contain the smallest number of molecules? A. 1g of phosphorus, P_4 B. 1g of chlorine, Cl_2 C. 1g of nitrogen, N_2 D. 1g of sulfur, S_8 The molecular formula of a compound is always _______ the empirical formula. A. more complex than B. different from C. a fraction of D. an integral multiple of Of the following, the only empirical formula is A. N_2F_2 B. N_2F_4 C. H_2C_2 D. HNF_2 Complete the following flow chart.

Explanation / Answer

1. no of moles = W/G.M.Wt

G.M.Wt of C3H8   = 12*3 + 1*8   = 44

no of moles = 44/44 = 1 mole >>>>>>>answer .......B

2. no of molecules = W*6.023*10^23/G.M.Wt

All molecules have same mass but different molarmass.

   molar mass is high no of molecules are less.

S8 molar mass is every high . it has 256g/moles. so it has less no of molecules.

D.1g of sulfur S8 >>>>>answer

3 .Empirical formula indicate the simplest whole number ratio.

an integral multiples of

4. HNF2 >>>answer

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