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n200080 [17]
3 years ago
15

PLEASE HELP!!!

Chemistry
2 answers:
Furkat [3]3 years ago
7 0

Answer:

The water is impure

Explanation:

Impurities raises the boiling points and lowers the melting point

maksim [4K]3 years ago
5 0
The water is impure
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What is true about the slope of a line if an object is moving back towards the starting point?
alina1380 [7]
I think its positive if its not im sorry :((
7 0
2 years ago
Calculate the solubility of cux(ksp=[cu2+][x2−]=1.27×10−36) in a solution that is 0.190 m in nacn.
nataly862011 [7]

if you have 1.27*10^-36= [Cu2+][X2-] then you can set both those values equal to x because they're stoichimetrically equal.

1.27*10^-36=x^2

Take the square root of both sides.

1.13*10^-18=x

That would be your solubility.

8 0
3 years ago
Read 2 more answers
If a flask maintained at 674 K contains 0.138 moles of NH4I(s) in equilibrium with 4.34×10-2 M NH3(g) and 9.39×10-2 M HI(g), wha
r-ruslan [8.4K]

Answer:

K = 4.07x10⁻³

Explanation:

Based on the reaction:

NH₄I(s) ⇄ NH₃(g) + HI(g)

You can define K of equilibrium as the ratio of concentrations of reactants and products, thus:

K = [NH₃] [HI] / [NH₄I]

But, as NH₄I is a solid, is not taken into account in the equilibrium, that means K expression is:

K = [NH₃] [HI]

As the concentrations in equilibrium of the gases is:

[NH₃] = 4.34x10⁻²M

[HI] = 9.39x10⁻²M

Equilibrium constant, K, is:

K = 4.34x10⁻²M * 9.39x10⁻²M

<h3>K = 4.07x10⁻³</h3>

4 0
2 years ago
Why did a drop of water need to be added in order to initiate the reaction?
jeka57 [31]

D.because the water is needed to wet the sand and keep the reaction safe

5 0
3 years ago
Read 2 more answers
¿Cuántos moles de bióxido de Nitrógeno (NO 2) se forman cuando reaccionan 5 moles de Nitrógeno (N 2)?
o-na [289]

Answer:

10 moles de NO2

Explanation:

Tenemos la ecuación de la reacción como sigue;

 N2 (g) + 2 O2 (g) → 2 NO2 (g)

Asi que;

Si 1 mol de nitrógeno produce 2 moles de NO2

5 moles de nitrógeno producirán 5 * 2/1 = 10

Por tanto, se producen 10 moles de NO2 moles

5 0
3 years ago
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