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Alex73 [517]
3 years ago
15

Bats,birds,and people evolution. Help

Chemistry
1 answer:
Troyanec [42]3 years ago
6 0

Answer:

i dont understand ... whats the question?

Explanation:

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Calculate the molarity of a 2.43 mol aqueous NaCl solution with a density of 2.00 g/mL.
anygoal [31]

Answer:

You need to add more points people will not answer if its this low

Explanation:

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3 years ago
What occurs when zero visibility is caused by heavy snowfall combined strong updrafts and downdrafts
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A whiteout occurs when strong updrafts and downdrafts combine 
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C3H8 + 5 O2 → 3 CO2 + 4 H2O<br> What is the number of atoms on each side of the equation?
Roman55 [17]

Answer: 1.2642*10²⁵ on both sides

Explanation:

First check how many moles are there on each side.
Since this is a balanaced equataion the number of moles on each side is the same thus the number of atoms is also same on both sides

There are 3 moles of carbon and 8 moles of hydrogen in C3H8
and 2 moles of oxygen in O2 but there 5 infront so 2*5 is 10
Number of moles on the right is 10+8+3 = 21

Now use Avogrado's constant

21 Moles* (6.02*10²³)/Mol
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= 1.2642*10²⁵

6 0
2 years ago
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The isomerization reaction, ch3nc → ch3cn, is first order and the rate constant is equal to 0.46 s-1 at 600 k. what is the conce
Harlamova29_29 [7]
According to this formula :
㏑[A] /[Ao] = - Kt 
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t = 20min = 0.2 x 60 =12 s
So by substitution :
㏑[A] / 0.3 = - 0.46 * 12
㏑[A] / 0.3 = - 5.52
by taking e^x for both side of the equation we can get [A]
∴[A] = 0.0012 mol dm^-3
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vlada-n [284]
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