We have to know the number of molecules present in 500 g of water.
The answer is: zero molecules present in 500g of water.
Water molecule is H₂O. In water molecule, nitrogen molecule can not be present. Molecular mass of water is 18 g. MOlecular mass of nitrogen molecule is 28 g.
500 g water contains 500/18 number of moles= 27.77 moles of water molecules which contains 27.77 X 6.023 X 10²³ number of water molecules.
There is no existence of N₂ molecule.
I believe the answer is C) both
Hope this helps
Answer:
Fire was found by early man and used with wood, and it is used on a candle to smell good.
Answer:
1.46L
Explanation:
2Na + 2H2O —> H2 + 2NaOH
Molar Mass of Na = 23g/mol
Mass of Na from the question = 3g
Number of mole of Na = Mass /Molar Mass
Number of mole of Na = 3/23
Number of mole of Na = 0.130mol
From the equation,
2moles of Na produced 1mole of H2.
Therefore, 0.130mol of Na will produce = 0.130/2 = 0.065mol of H2.
Recall: 1mole of a gas occupy 22.4L at stp.
If 1 mole of H2 occupy 22.4L at stp,
Then 0.065mol of H2 will occupy = 0.065 x 22.4 = 1.46L
Helium (He) is the answer
