How many molecules are in 2.10 moles of CO_2? a) 3.79 times 10^24 molecules b) 1

Question

How many molecules are in 2.10 moles of CO_2? a) 3.79 times 10^24 molecules b) 1.79 times 10^18 molecules c) 7.53 times 10^24 molecules d) 2.53 times 10^24 molecules e) 1.26 times 10^24 molecules For the reaction: 2H_2O(l) + 137 kcal rightarrow 2H_2(g) + O_2(g) How many local are needed to react 2.77 moles of H_2O a) 380 kcal b) 137 local c) 274 kcal d) 190. kcal e) 760. Kcal Consider the following equation: BaO_2 + Na_2SO_4 rightarrow BaSO_4 + 2NaCl How many moles of barium sulfate are produced from 0.100 many moles of barium chloride? a) 0.0100 mole b) 0.100 mole c) 0.200 mole d) 1.00 mole e) 2.00 mole One mole of particles of any substance contains how many particles? a) 6.02 times 10^-23 b) 3.01 times 10^24 c) molar mass times 6.02 times 10^23 d) moles in 6.02 times 10^23 grams of an element e) 6.02 times 10^23 What is oxidized and what is reduced in the following reaction? 2Al(s) + 3Br_2(g) rightarrow 2AlBr_3(s) a) Al is oxidized and Br_2 is re

Explanation / Answer

Q17

find molecules in 2.1 mol of CO2

1 mol = 6.022*10^23 molecules

therefore

2.1 mol = 2.1* 6.022*10^23 = 1.2646*10^24 molecules

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