3 years ago

Help me i don’t know what to put here pls thank you!

Chemistry

1 answer:

taurus [48]3 years ago

4 0

I’m pretty sure that the answer is life, they all have life

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A compound is formed when 12.2 g Mg combines completely with 5.16 g N. What is the percent composition of this compound? Please

Viefleur [7K]

3Mg + N₂ → Mg₃N₂
n(Mg) = 12,2g÷24,4g/mol = 0,5mol - limiting reagente.
n(N₂) = 5,16g÷28g/mol = 0,18mol
n(Mg₃N₂):n(Mg) = 1:3, n(Mg₃N₂) = 0,166mol
m(Mg₃N₂) = 0,166mol·101,2g/mol = 16,8g.
%(N)= 2·Ar(N)÷Mr(Mg₃N₂) = 2·14÷101,2 = 27,66% = 0,2766
%(Mg) = 3·Ar(Mg)÷Mr(Mg₃N₂) = 3·24,4÷101,2 = 72,34%
or 100% - 27,66% = 72,34%.

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4 years ago

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3 years ago

If 4.80 mol Ca mixed with 2 mol N2, which is the limiting reactant? 3Ca (s) + N2 (g) Ca3N2 (s)

Andreyy89

Nitrogen in the limiting reactant x

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3 years ago

_______ is the cause of most ocean surface currents. A) Gravity B) The moon C) The wind D) Earth's orbit

11Alexandr11 [23.1K]

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4 years ago

Determine the mass of an object that has a volume of 88.6 ml and a density of 9.77 g/ml.

Nostrana [21]

Given:
The volume is V = 88 mL
Density, d = 9.77 g/mL

Because mass = volume * density, therefore the mass of the object is
$m = (88.6 \, mL)*(9.77 \, \frac{g}{mL} )=865.62 \, g$

Answer: The mass is 865.2 g or 0.865 kg

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4 years ago