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kirza4 [7]
2 years ago
11

What is the percent by mass (%m/m) concentration of ammonium hydroxide (nh4oh) in a solution prepared by dissolving 8.40 g nh4oh

in 94.60 g of h2o?
Chemistry
1 answer:
Gnom [1K]2 years ago
8 0
If you want to express the concentration in terms of percent mass, then you would have to divide the mass of solute to the mass of solution, then multiply it by 100.

Mass of solute = 8.40 g
Mass of solution = 8.40+94.60 = 103 g

Percent Mass = (8.40/103)*100 = <em>8.16%</em>
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When phosphorus (P) and bromine (Br) bond, what kind of bond would happen?
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8 0
3 years ago
The equilibrium constant, Kp, for the following reaction is 0.497 at 500K.PCl5(g) PCl3(g) + Cl2(g)If an equilibrium mixture of t
Anestetic [448]

<u>Answer:</u> The equilibrium partial pressure of chlorine gas is 0.360 atm

<u>Explanation:</u>

For the given chemical equation:

PCl_5(g)\rightleftharpoons PCl_3(g)+Cl2(g)

The expression of K_p for above reaction follows:

K_p=\frac{p_{Cl_2}\times p_{PCl_3}}{p_{PCl_5}}

We are given:

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Putting values in above equation, we get:

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5 0
2 years ago
Why must the spot applied to a TLC plate be above the level of the developing solvent? What problem will ensue if the level of t
algol13

Answer:

See explanation

Explanation:

If the spot in TLC is below the solvent front, it will be observed that the spot, instead of being separated by the solvent as expected, will just dissolve away in the solvent and zero actual separation of the mixture is achieved.

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6 0
3 years ago
FOR LondonCreamCakes<br> no sure if its right but im trying to help.. lol dont mind all the tabs
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Answer:

It kinda helps but not  really

Thanks for trying anyway doe!

Explanation:

7 0
2 years ago
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