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1. What is the mass of 3.32 mols of N2

2. How many molecules are in 4.67 mols of H2O

3. How many Sodium atoms are in 2.00 mols of Na2O

4. What is the mass of 3.57 mols of NaOH

5. How many mols are in 57g of H2O

Sagot :

GurashishRandhawaid

Explanation:

1

Number of nucleon =

Molarmassofnucleon

Massofatom

=

1.6726×10

−24

g/nucleon

3.32×10

−23

g

=19.8=20(approximately)

It is given that element comprises of 2 atoms

Hence,number of nucleon = 2×20=40

2

You have 4.70 mol H2O

There are two H atoms in 1 molecule H2O.

Therefore, there must be 2*4.70 = 9.40 mols H in 4.70 mols H2O.

How many mols O in 4.70 mols H2O? That's 4.70 mols, of course.

Said another way, you have 2 mols H for every 1 mol H2O and 1 mol O for every 1 mol H2O.

So for 50 mols H2O you have 100 mols H and 50 mol O.

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