Question

sodium is represented as Na11²³
what is its atomic mass ?
write it's gram atomic mass?
How many grams of Na will be there in 11.5g of the sample ?​

Answer 1

Here is your answer

1)What is its atomic mass?

Answer:- 23

2)Write it's gram atomic mass?

Answer:- 23 g

3)How many grams of Na will be there in 11.5g of the sample?

Answer:- Given mass:-11.5

Molar mass of Na:-23

no. of moles of Na=11.5/23 = 1/2 or 0.5mol

No. of atoms = No. of moles × Avagradro No.

$= 0.5 × 6.022× {10}^{23}$

$= 3.022 \times {10}^{23} atoms$

instead of grams atoms should be there in the third questions so please see to it.

Hope it's helpful

Answer 2

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9th grade from Tamilnadu