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Darya [45]
3 years ago
15

ASAP PLEASE

Chemistry
1 answer:
dimaraw [331]3 years ago
6 0
The mass of Hydrogen is 2 g/mol
The mass of Helium is 4 g/mol
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3 years ago
How long would it take a train to travel 500 miles at 25 mph?
faust18 [17]

Answer:

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3 0
3 years ago
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Anyone could help me out?
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Basile [38]
Part 1: Potassium, and Rubidium.
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