How many moles of Ni are there in a sample of Ni that contains 5.40×1024 atoms?...

Question

Question

How many moles of Ni are there in a sample of Ni that contains 5.40×10²⁴ atoms?

How many Ne atoms are there in 3.80 moles of Ne?

How many moles of Ca are there in 27.0 grams of Ca?

How many grams of S are there in 2.89 moles of S?

Answer 1

Answer #1

ANSWER:-

1 mole = 6.022×10²³ atoms,

SO 5.50 X 10²⁴/6.022×10²³ = 0.9133 X 10 = 9.133 MOLES OF NICKEL

3.80 x 6.022×10²³ = 22.88 x 10²³ atoms of Ne

where m= mass of ca = 20 g/mol

w= 27 gm

n= 27/20 = 1.35 moles of calcium

w= n x m

mass for sulfur =32

w = 2.89 x 32 =92.48 gm of sulfur

Answer 2

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