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Mekhanik [1.2K]
3 years ago
15

is there a difference between a homogenouos mixture of hydrogen gas and oxygen gas, and a sample of vapor? explain?

Chemistry
1 answer:
marin [14]3 years ago
8 0
Yes. In a homogeneous mixture the hydrogen and oxygen are not chemically combined; in water vapor, they are. You can separate a homogeneous mixture of hydrogen and oxygen by physical means, such as by cooling the mixture until the oxygen liquefies. If you cool water vapor you're just going to get liquid water and then ice - not two separate substances. That's because compounds can only be separated into their elements by chemical means.
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How many moles of hydrogen are needed to completely react with 2 moles of nitrogen
Natali5045456 [20]
Assuming ammonia is the product of this reaction:

N2+3H2--->2NH3

2 mole N2 * (3 mol H2)/(1 mol N2)= 6 mol H2

You would need 6 mol of hydrogen gas to completely react with 2 mol of nitrogen. 
5 0
3 years ago
I just don’t know what to do
ValentinkaMS [17]

Answer:

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3 years ago
Which statement is most likely correct about the average temperatures in San Francisco, California as compared to Norfolk, Virgi
Lynna [10]

Answer:

It is higher in Norfolk because of the warm ocean currents from the south

Explanation:

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7 0
3 years ago
A soft silvery metal has two naturally occurring isotopes: mass 84.9118, accounting for 72.15% and mass 86.9092, accounting for
zloy xaker [14]

Answer: The atomic weight of the metal would be 85.47.

Explanation:

Mass of isotope 1 of metal = 84.9118

% abundance of isotope 1 of metal = 72.15% = \frac{72.15}{100}

Mass of isotope 2 of metal= 86.9092

% abundance of isotope 2 of metal = 27.85% = \frac{27.85}{100}

Formula used for average atomic mass of an element :

\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})

A=\sum[(84.9118)\times \frac{72.15}{100})+(86.9092)\times \frac{27.85}{100}]]

A=85.47

Therefore, the atomic weight of the metal would be 85.47.

6 0
3 years ago
Answer Fast Please!!!
den301095 [7]

Answer:

The Periodic Table is organized in order of atomic number.

Explanation:

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8 0
3 years ago
Read 2 more answers
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