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vlada-n [284]
3 years ago
6

Which equation describes a reduction?​

Chemistry
1 answer:
ira [324]3 years ago
7 0
The answer choice is going to be B.
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If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
Mekhanik [1.2K]
The answer to your question is letter A! Hope that helps
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A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and
kvasek [131]

<u>Given:</u>

Moles of He = 15

Moles of N2 = 5

Pressure (P) = 1.01 atm

Temperature (T) = 300 K

<u>To determine:</u>

The volume (V) of the balloon

<u>Explanation:</u>

From the ideal gas law:

PV = nRT

where P = pressure of the gas

V = volume

n = number of moles of the gas

T = temperature

R = gas constant = 0.0821 L-atm/mol-K

In this case we have:-

n(total) = 15 + 5 = 20 moles

P = 1.01 atm and T = 300K

V = nRT/P = 20 moles * 0.0821 L-atm/mol-K * 300 K/1.01 atm = 487.7 L

Ans: Volume of the balloon is around 488 L


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3 years ago
How many molecules of ethane ( C2H6) are present in 0.197g of C2H6?
gayaneshka [121]

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C2H6/C2H6=1

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Why is water called "the universal solvent" and why is this important for living things?
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As it dissolves a large number of solid, liquid and gaseous substances it's called a universal solvent. It's important for living thing because all of them depend on water to survive. For example, many organisms live in the water and they find some of the nutrients that are necessary for live dissolved in water - gases included.
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