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3 years ago

Calculate the mass (in g) of 2.1 x 1024 atoms of W.

1 answer:

4 0

Atomic mass W = 183.84 u.m.a

183.84 g ----------- 6.02x10²⁴ atoms
?? g ---------------- 2.1x10²⁴ atoms

2.1x10²⁴ x 183.84 / 6.02x10²⁴ =

3.860x10²⁶ / 6.02x10²⁴ = 641.30 g

hope this helps!

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Question 19 A chemist dissolves of pure hydroiodic acid in enough water to make up of solution. Calculate the pH of the solution

kvasek [131]

The question is incomplete , complete question is:

A chemist dissolves 640.0 mg of pure hydroiodic acid in enough water to make up 280.0 mL of solution . Calculate the pH of the solution. Round your answer to significant decimal places.

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Explanation:

$HI(aq)\rightarrow H^+(aq)+I^-(aq)$

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