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Sindrei [870]
3 years ago
15

How much more co2 is there in the atmosphere?

Chemistry
1 answer:
Vika [28.1K]3 years ago
8 0
The atmosphere has 0.04 % CO2 in the atmosphere
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How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?
Lostsunrise [7]
Answer is: <span>D. 327,992.8 J.
</span>m(granite) = 17 kg = 17000g.
ΔT(granite) = 21°C - 45°C = -24°C (-24K).<span>
cp(granite</span>) = 0,804 J/g·°C, <span>specific heat capacity of granite.
Q = m(granite</span>) · ΔT(granite) · cp(granite).<span>
Q = 17000 g ·(-24</span>°C)<span>· 0,804 J/g·K.
Q = -327990 J.
</span>The granite lost 327990 joules of energy.<span>
Q - </span>amount of energy gained or lost.<span> 
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8 0
4 years ago
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How many moles are there in<br> 15 grams of:<br> CaCO3<br> 204 grams of:<br> Al203
DerKrebs [107]

1) moles = mass/mR

CaCO3 Mr = 40 + 12 + (16×3)

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= 100

mass = 15

so the moles would be 15 ÷ 100

which is 0.15 moles of CaCO3

2) moles = mass ÷ Mr

Mr of Al2O3 = 27 + (16×3)

= 27 + 48

= 75

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so the moles would be 204/75 which is 2.72 moles of Al2O3

3 0
3 years ago
The Mohs scale measures A. density of a mineral. B. a mineral’s hardness. C. the luster of a mineral. D. a mineral’s type of cry
disa [49]
B- The Moh's Hardness Scale is 0-10 starting with talc and ending with diamonds that ranks the hardness of minerals. A minerals hardness can be determined by if it scratches another mineral, it is harder, and if it is scratched, it is softer.
3 0
4 years ago
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What is the complete set of quantum numbers for the fifth electron added to a hydrogen ion?
N76 [4]
1s2 2s2 2p1

fifth electron is in 2p orbital 

so answer is  2 2 -1 -1/2 , or 2 2 -1 1/2

*1/2 and -1/2 are spins, so they are interchangeable when writing the first electron in the ml
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4 years ago
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Explanation:

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