How many moles of Cl are present in each of the follow molar quantities? 1. 0.50

Question

How many moles of Cl are present in each of the follow molar quantities?

1. 0.50 moles of POCl3

2. 1.40 moles CCl4

Determine the grams of sulfur present in each of the following

a. 2.41 x 10^22 SO3 molecules

b. 8.08 *10^16 Na2S2O3 molecules

Using the balanced chemical equation, calculate the number of moles of CO2 that can be obtained from 1.50 moles of the first reactant with an excess of the other reactant

1. 2C8H18 +5O2 -> 16CO2 + 18H2O

2. 2HCl + CaCO3 -> CaCl2 + CO2 + H2O

Any explanations to help would be marvelous :)

Explanation / Answer

1. 3*0.5 =1.5

2. 1.4*4 = 5.6

a) Mass = 2.41*10^22/(6.023*10^23)*32 = 1.284 gm

b) Mass = 8.08*10^16*2/(6.023*10^23)*32 = 0.00000858575 gm

1. We get 16 CO2 from 2 moles of first reactant

from 1.5 mole we will het 16/2*1.5 = 12

2. We get 1 CO2 from 2 moles of first reactant

1.5 mole HCl will give 0.75 mole CaCl2 and 0.75 mole CO2

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