What is the number of magnesium atoms that equal a mass of 24 31 amu ? select on

Question

What is the number of magnesium atoms that equal a mass of 24 31 amu ? select one: 1 12 24 6.02 times 10^23 none of the above which of the following represents 1 mole of hydrazine gas, N_2H_4? select one: 6.02 times 10^22 hydrazine gas molecules 22.4 mL hydrazine gas at STP 32.06 amu hydrazine gas all of the above none of the above lysine is used as a topical medical skin creme. What is the molecular formula of lysine if the empirical formula is C_3H_7NO, and the approximate molar mass is 146 g/mol select one: C6H14NO2 C6H14N2O2 CHNO C3H7NO2 C3H7NO how many mole of carton will react enough oxygen to produce 4 mole of carbon monoxide? C + O2 = CO select one: 1 2 3 4 none of the above

Explanation / Answer

1. a.1

2. e.none of the above

3. n = 146/(3*12+7+14+16) = 2

molecular formula = 2*(C3H7NO) = C6H14N2O2

answer: b

4. d ( 1 mol C = 1 mol CO)

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