[The Man 7]

2.3 g of sodium combine with 0.80 g of oxygen..

and the questions are: How many moles of sodium are present?

How many moles of oxygen atoms are present?

How many moles of sodium combine with one mole of oxygen?

Thanks

[ARGOS++]

Dear The Man 7;

And your Answers/Assumptions are:?,   ─    And would you please read:     "Forum Rules" (2. & 4.)

Good Luck!
                    ARGOS⁺⁺

[The Man 7]

1. 0.1 moles are present
 2. 0.05
3. 2 moles



 

[ARGOS++]

Dear The Man 7;

That looks correct.    But for 2:  0.05 moles, not only a number.
Good Luck!
                    ARGOS⁺⁺

[The Man 7]

0.72 g of magnesium combine with 0.28 g of Nitrogen

Q's
1. How many moles of magnesium are present?
2. How many moles of nitrogen atoms combine?
3. How many moles of magnesium combine with one mole of nitrogen atoms?
4. What is the formula of magnesium nitride?

Answers...

1. 0.03 moles

And im not so sure about the others..?

[ARGOS++]

Dear The Man 7;

Sorry!, - I looked wrong!
For yor former question Nr. 3:   How many moles of  Oxygen atoms in 1.0 moles Oxygen?
                                           So how much moles Na are required?
Please correct it.

For your new question 2:         How many moles of  Nitrogen atoms in 1.0 moles Nitrogen?
For your new question 4:         Ask Wiki for the formula.

Good Luck!
                    ARGOS⁺⁺

[The Man 7]

Hey, i didn't know Wiki did formulas, link?

Thanks.