Question

1) How many moles are present in 7,5×10^¹⁸ atoms of sodium​

Answer 1

Answer:

1.245 × 10^-5 moles

Explanation:

1 mole of Na = 6.02 × 10^23

? moles of Na = 7,5 × 10^¹⁸

? moles of Na = 7.5/6.02 × (10^¹⁸)/(10^23) = 1.245 × 10^-5 moles