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3 years ago

Calculate number of moles in 10.6g of sodium carbonate

1 answer:

7 0

m Na₂CO₃: 23g×2 + 12g + 16g×3 = 106 g/mol
------------------------------
1 mol ------- 106g
X ------------ 10,6g
X = 10,6/106
X = 0,1 mol Na₂CO₃

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calculate the mass of 120cc nitrogen present at STP. how many number of molecules are present in it?

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$0.15008\ \text{g}$

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Mass of $N_2$ is

$m=nM\\\Rightarrow m=0.00536\times 28\\\Rightarrow m=0.15008\ \text{g}$

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3 years ago

Which of the following is the correct formula for sodium oxide? NaO2 NaO Na2O3 Na3O4 Na2O

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