Question

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Question- Convert 8.65 × 10^25 atoms H to its mass in grams
A. 5.26 x 10^49 g H
B. 1.45 g H
C. 1.01 g H
D. 145 g H

Answer 1

Mass = 145g H

Step-by-step explanation:

-First we need to convert atoms to moles :

1mole =6.022 ×10^23 atoms (The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 1023))

8.65×10^23 atoms of H ×1 mol / 6.022×10^23

=1.45×10^2

=145 mol

- then convert moles to grams :

Mass in grams of H

Mass = number of moles ×molar mass for H

= 145 mol ×1 g/mol

= 145 g