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ElenaW [278]
2 years ago
15

Giúp mình 2 câu này với ạ

Chemistry
1 answer:
alisha [4.7K]2 years ago
5 0

Answer:it is wrong answer

Explanation:estro man

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What is the mass in grams of 2.50 mol of ammonia vapor, NH3?
Crank

Molar mass:-

\\ \tt\longmapsto 14+3(1)=17g/mol

Now

\\ \tt\longmapsto Given\:mass=No\;of\:moles\times Molar\;mass

\\ \tt\longmapsto Given\:mass=17(2.5)

\\ \tt\longmapsto Given\:mass=42.5g

7 0
3 years ago
Which of earths spheres contains most of its mass?
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The geosphere is about 99.94% of Earth's mass, so C is the answer.
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How to prepared sodium chloride solution in the laboratory.​
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hope it will help you

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hope it will helps

5 0
2 years ago
When a rock falls from outer space all the way to the groung, its called a?
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Methane (CH4), ammonia (NH3), and oxygen (O2) can react to form hydrogen cyanide (HCN) and water according to this equation:
egoroff_w [7]

The grams  of  oxygen that are required  to produce 1  mole  of H₂O  is 16 g ( answer  B)

<u><em> calculation</em></u>

2 CH₄  + 2NH₃ +3 O₂ → 2HCN  + 6H₂O

step 1: use the mole ratio to find moles of O₂

from equation above the  mole ratio  of O₂: H₂O  is 3:6 therefore the moles of O₂  = 1 mole x3/6 =0.5 moles

step  2: find   mass of O₂

mass= moles x molar mass

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mass O₂ = 0.5 moles x 32 g/mol = 16 g (answer B)

6 0
3 years ago
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