Question

Mass of sodium + nitrogen +oxygen+ oxygen+ oxygen =

Answer 1

Answer:

Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? Molar mass (in grams) is always equal to the atomic weight of the atom!

Explanation:

i looked it up ok

Answer 2

Answer:

Mass of sodium + nitrogen +oxygen+ oxygen+ oxygen = =85 g/mol

Explanation:

Molar mass is the mass of 1 mole of the substance and its unit is g/mol

We find the molar mass by just adding atomic mass of the elements present in the chemical formula of the compound

For example  

$H_2 SO_4$

Atomic mass of H is 1.008 (approximately 1)

Atomic mass of S is 32

Atomic mass of O is 16

There are 2, H atoms 1, S atom and 4, O atoms

So, the molar mass of the compound $H_2 SO_4$ will be

$\\ =[(2 \times 1)+(1 \times 32)+(4 \times 16)] \\\\ =(2+32+64)=98 \frac{g}{m o l}$

The question says 1, Na  

1, N and  

3, O

So the chemical formula we get is $NaNO_3$

The molar mass of the compound $NaNO_3$ is

$\\ =[(1 \times 23)+(1 \times 14)+(3 \times 16)] \\\\ =(23+14+48)$

=85 g/mol (Answer)