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JulsSmile [24]
3 years ago
6

Can someone pls help me

Chemistry
1 answer:
bagirrra123 [75]3 years ago
5 0

the moon orbits aroun the earth not the sun

i hope i help you!!

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Which of the following is not a reason to volunteer?
Reptile [31]

Answer:

A. To make money

Explanation:

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3 years ago
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At STP, which sample contains the same number of molecules as 11.2 liters of CO2(g) at STP?
Lana71 [14]
The answer is (3) 11.2 L of N2(g). When the choices are all gases, the number of molecules depends on the molar number of the gas. Under the condition of STP, the molar number of a gas is depends on volume only. So the same volume of gas has the same number of molecules.
8 0
4 years ago
For the diprotic weak acid h2a, ka1 = 3.2 × 10-6 and ka2 = 6.1 × 10-9. what is the ph of a 0.0650 m solution of h2a? what are th
Stolb23 [73]
Given:

Diprotic weak acid H2A:
 
Ka1 = 3.2 x 10^-6
Ka2 = 6.1 x 10^-9. 
Concentration = 0.0650 m 

Balanced chemical equation:

H2A ===> 2H+  + A2- 
0.0650       0        0
-x                2x       x
------------------------------
0.065 - x     2x      x

ka1 = 3.2 x 10^-6 = [2x]^2 * [x] / (0.065 - x)

solve for x and determine the concentration at equilibrium. 


5 0
3 years ago
Help me please i nedd hep
mojhsa [17]

Answer:

7 to 5

Explanation:

power of 500 to 5

3 0
2 years ago
How many H2 and O2 molecules do you need to make exactly 4 water molecules with no leftovers?
vlabodo [156]
You need 4 H2 molecules and 2 O2 molecules.
This is because water is H2O which is 2 Hydrogen and 1 Oxygen so if you want to make 4 water molecules, you’ll need 8 hydrogen and 4 oxygen.
Given H2 you need 4 because 4•2 is 8 and for O2 you need 2 because 2•2 is 4.
I hope this makes sense.
3 0
3 years ago
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