3 years ago

Plz help I need help plz ASAP

Chemistry

1 answer:

snow_lady [41]3 years ago

3 0

6:c

7: might be ice but im not really sure, hope you do well.

Explanation:

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3 years ago

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Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 3.50 moles of magnesium

Firdavs [7]

Answer:

$n_{Mg}=3.50molMg\\\\ n_{Cl}=7.00molCl\\\\n_O=28.0molO$

Explanation:

Hello there!

In this case, according to the given information it turns out possible for us to realize that one mole of the given compound, Mg(ClO₄)₂, has one mole of Mg, two moles of Cl and eight moles of O; thus, we proceed as follows:

$n_{Mg}=3.50molMg(ClO_4)_2*\frac{1molMg}{1molMg(ClO_4)_2}=3.50molMg\\\\ n_{Cl}=3.50molMg(ClO_4)_2*\frac{2molCl}{1molMg(ClO_4)_2}=7.00molCl\\\\n_O=3.50molMg(ClO_4)_2*\frac{8molO}{1molMg(ClO_4)_2}=28.0molO$

Best regards!

3 0

2 years ago

A large weather balloon filled with helium has a volume of 7.00 x 102 L at STP. Which expression should be used to find the mass

balandron [24]

Answer:

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Explanation:

Mole of Helium = volume of Helium/ 22.4dm^3/mol

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Mass of Helium = mole of Helium x Molarmass of Helium

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