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sveta [45]
3 years ago
8

Plzzzz HELPPPP!!!!!!!

Chemistry
2 answers:
yulyashka [42]3 years ago
7 0

Explanation:

Seems to me like you have 8H and 2N. You need 3H for every N so 6H total. 8H-6H=2H which is one molecule of H2.

Marysya12 [62]3 years ago
4 0

Explanation:

one molecule of H2 I think

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145.8g of Mg contains how many moles?
Tems11 [23]
A: 6 moles
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8 0
3 years ago
Type the correct answer in the box. Express your answer to three significant figures.
VladimirAG [237]

<u>Given:</u>

Mass of calcium nitrate (Ca(NO3)2) = 96.1 g

<u>To determine:</u>

Theoretical yield of calcium phosphate, Ca3(PO4)2

<u>Explanation:</u>

Balanced Chemical reaction-

3Ca(NO3)2 + 2Na3PO4 → 6NaNO3 + Ca3(PO4)2

Based on the reaction stoichiometry:

3 moles of Ca(NO3)2 produces 1 mole of Ca3(PO4)2

Now,

Given mass of Ca(NO3)2 =  96.1 g

Molar mass of Ca(NO3)2 =  164 g/mol

# moles of ca(NO3)2 = 96.1/164 = 0.5859 moles

Therefore, # moles of Ca3(PO4)2 produced = 0.0589 * 1/3 = 0.0196 moles

Molar mass of Ca3(PO4)2 = 310 g/mol

Mass of Ca3(PO4)2 produced = 0.0196 * 310 = 6.076 g

Ans: Theoretical yield of Ca3(PO4)2 = 6.08 g



7 0
2 years ago
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A student observes chloroplasts in the micrograph of a cell.
allochka39001 [22]

Answer:

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A 143.1 g sample of a compound contains 53.4 g of carbon, 16.9 g of hydrogen, 43 g of nitrogen, and some amount of oxygen. what
nika2105 [10]
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Quick help I really need help
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Answer:

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Explanation:

8 0
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