2 years ago

The energy exchange with the environment during a chemical reaction is called the heat of reaction.

Chemistry

1 answer:

JulijaS [17]2 years ago

6 0

This is a hard question

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When a 0.4500 g sample of impure potassium chloride was dissolved in water and treated with an excess ofsilver nitrate, 0.8402 g

Svetllana [295]

Answer:

97.78% KCl in the original sample

Explanation:

5 0

2 years ago

Please answer asap need it by Wednesday morning

marta [7]

Answer:

1.7 PH

Explanation:

Ph= -log(0.02)= 1.698

6 0

2 years ago

The maximum amount of nickel(II) cyanide that will dissolve in a 0.220 M nickel(II) nitrate solution is...?

sweet [91]

Answer : The maximum amount of nickel(II) cyanide is $5.84\times 10^{-12}M$

Explanation :

The solubility equilibrium reaction will be:

$Ni(CN)_2\rightleftharpoons Ni^{2+}+2CN^-$

Initial conc. 0.220 0

At eqm. (0.220+s) 2s

The expression for solubility constant for this reaction will be,

$K_{sp}=[Ni^{2+}][CN^-]^2$

Now put all the given values in this expression, we get:

$3.0\times 10^{-23}=(0.220+s)\times (2s)^2$

$s=5.84\times 10^{-12}M$

Therefore, the maximum amount of nickel(II) cyanide is $5.84\times 10^{-12}M$

7 0

2 years ago

how can knowledge of percent composition help you as a consumer ? how can you promote responsible consumerism ?

Nonamiya [84]

Answer:

it is a nice question....my mind tells me that the first is it use me as a good vibes and can use to anything the second i will do my best too absorbe it.

Explanation:

Hope this help...

8 0

2 years ago

Write the congruence condition in symbolic form for each pair of triangles in pic above. If wrong answer I will report. If corre

arsen [322]

Answer: ABC&AMN are congruent by ASA comgruence

angle A=A

sideAN=AB

angle M=C

Explanation:

4 0

2 years ago