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FinnZ [79.3K]
3 years ago
15

Can someone help me with this, I feel so sleepy right now :(

Chemistry
1 answer:
garik1379 [7]3 years ago
6 0

Answer:

I AM SLEEPY TOO WILL HELP TOMMOROW!

Explanation:

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Gravitational pull coming from the sun
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2 years ago
What is the molar solubility of marble (i.e., [ca2 ] in a saturated solution in normal rainwater, for which ph=5.60? express you
Brut [27]
Missing in your question :

Ksp of(CaCO3)= 4.5 x 10 -9

Ka1 for (H2CO3) =  4.7 x 10^-7

Ka2 for (H2CO3) = 5.6 x 10 ^-11

1) equation 1 for Ksp = 4.5 x 10^-9 

CaCO3(s)→ Ca +2(aq)    +  CO3-2(aq)  

2) equation 2 for Ka1 = 4.7 x 10^-7

 H2CO3 + H2O → HCO3- + H3O+

3) equation 3 for Ka2 = 5.6 x 10^-11

 HCO3-(aq) + H2O(l) → CO3-2 (aq)  + H3O+(aq)

so, form equation 1& 2&3 we can get the overall equation:
CaCO3(s)  +  H+(aq)  → Ca2+(aq)   + HCO3-(aq)

note: you could get the overall equation by adding equation 1 to the inverse of equation 3 as the following:
when the inverse of equation 3 is :

CO3-2 (aq) + H3O+ (aq) ↔ HCO3- (aq) + H2O(l)  Ka2^-1 = 1.79 x 10^10
when we add it to equation 1
CaCO3(s) ↔ Ca2+(aq)  +  CO3-2(aq)   Ksp = 4.5 x 10^-9

∴ the overall equation will be as we have mentioned before:
when H3O+ = H+

CaCO3(s) + H+(aq)  ↔ Ca2+ (aq) + HCO3-(aq)   K= 80.55

from the overall equation:

∴K = [Ca2+][HCO3-] / [H+]

when we have [Ca2+] = [HCO3-] so we can assume both = X

∴K = X^2 / [H+]

when we have the PH = 5.6 so we can get [H+]

PH = - ㏒[H+]
5.6 = -㏒[H]
∴[H] = 2.5 x 10^-6

so, by substitution on K expression:

∴ 80.55 = X^2 / (2.5 x10^-6)

∴X = 0.0142

∴[Ca2+] = X = 0.0142 
6 0
4 years ago
1. How many moles of carbon are in 2.25 * 10^22 atoms of carbon ?
tresset_1 [31]

Answer:

atoms of C? 2.25 x 1022 atoms C x 1 mole C = 0.037 mol C

Explanation:

 How many moles of C are in 2.25 x 1022 atoms of C?

3 0
3 years ago
PLS HELP ASAP! <br> just need to balance the equation but i have no idea how pls help meee
Vladimir [108]

Answer:  --- N^2 + --- F^2 => --- NF^3

              Question 28:  Answer:   1 N^2 + 3F^2 => 2NF^3

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Explanation:

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A balloon filled with air has a volume of 4.24 liters at 23.00
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Answer:

ku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ichku al ceine du ruticen cesti einste ich

Explanation:nooooopeeeee :))))))))))))))))))))))))

6 0
3 years ago
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