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andrew-mc [135]
3 years ago
6

Which statement about the earth atmosphere is true

Chemistry
1 answer:
liq [111]3 years ago
8 0
I believe it to be C

Explanation: The concentration of carbon dioxide in Earth’s atmosphere is currently at nearly 412 parts per million (ppm) and rising. This represents a 47 percent increase since the beginning of the Industrial Age, when the concentration was near 280 ppm, and an 11 percent increase since 2000, when it was near 370 ppm.
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How many moles of copper are needed to react with sulfur to produce 0.25 moles of copper sulfide
Setler [38]
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by reaction                      1 mol           1 mol
from the problem         0.25 mol        0.25 mol
 0.25 mol   Cu
6 0
3 years ago
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Which sequence correctly describes the flow of genetic information in a cell?
Blababa [14]
A.
Proteins → RNA → DNA 
I think.. 

<span>Hope this helps. c:</span>

5 0
3 years ago
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A gas with a volume of 500. mL at 75°C is heated to 225 °C. What is the new volume of the gas?
mihalych1998 [28]
Using v1/t1=v2/t2
v1=500
v2=?
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t2=225=498
500/368=v2/498
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6 0
3 years ago
What is the concentration of 10.00 mL of HBr if it takes 16.73 mL of a 0.253 M LiOH solution to neutralize it?
Leni [432]
First. let's write the reaction formula: HBr +LiOH ----> LiBr + H₂O

let's get the moles of LiOH first

moles= Molarity x Liters

moles= 0.253 M x 0.01673 Liter= 0.00423 moles LiOH

using the balanced equation, you can see that 1 mol LiOH is equal to 1 mol HBr. so:

0.00423 mol LiOH = 0.00423 mol HBr

now let's find the concentration

molarity= mol/ Liters

0.00423 mol/ 0.01000 Liters= 0.423 M
3 0
3 years ago
Calculate the pH of 0.50M H2S
-BARSIC- [3]
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I hope this helps.  Let me know if anything is unclear.

5 0
3 years ago
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