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aalyn [17]
2 years ago
5

SOMEONE PLEASE HELP! WILL GIVE BRAINLIEST!

Chemistry
1 answer:
Elis [28]2 years ago
3 0

Answer:

1 At 0C° KNO3 is least soluble

2 Approximately 65 grams

3 About 30 grams

4 yes it increases at the same rate can be explained by straight line graph

Explanation:

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Radioisotopes are unstable because they contain an excess number of:.
myrzilka [38]
Neutrons.

Not sure if you need a full explanation but let me know if you do :]
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2 years ago
The picture below shows xylem and phloem vessels, which are tube-
Aneli [31]

Answer:

B

Explanation:

it transports water from roots to the leafs

8 0
2 years ago
Calculate the pH at the equivalence point for the titration of 0.110 M methylamine (CH3NH2) with 0.110 M HCl. The Kb of methylam
nikklg [1K]
The reaction between the reactants would be:

CH₃NH₂ + HCl ↔ CH₃NH₃⁺ + Cl⁻

Let the conjugate acid undergo hydrolysis. Then, apply the ICE approach.

             CH₃NH₃⁺ + H₂O → H₃O⁺ + CH₃NH₂
I                0.11                       0             0
C               -x                          +x           +x
E            0.11 - x                     x             x

Ka = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]

Since the given information is Kb, let's find Ka in terms of Kb.

Ka = Kw/Kb, where Kw = 10⁻¹⁴

So,
Ka = 10⁻¹⁴/5×10⁻⁴ = 2×10⁻¹¹ = [H₃O⁺][CH₃NH₂]/[CH₃NH₃⁺]
2×10⁻¹¹ = [x][x]/[0.11-x]
Solving for x,
x = 1.483×10⁻⁶ = [H₃O⁺]

Since pH = -log[H₃O⁺],
pH = -log(1.483×10⁻⁶)
<em>pH = 5.83</em>


4 0
3 years ago
Which change will cause the greatest increase in the rate of reaction for this chemical reaction? 8Zn(s) + S8(s) 8ZnS(s) A. addi
Rus_ich [418]

I found another question like this. Someone answered "The best answer to this question is adding a catalyst. 

Adding a catalyst  will cause the greatest increase in the rate of reaction for this chemical reaction , 8Zn(s) + S8(s) 8ZnS(s).                                                         ---> adding a catalyst always affects the rate of a reaction."

8 0
3 years ago
Read 2 more answers
Metals are considered to be ___________________ because they let electricity flow.
Yuri [45]

Answer:

conductors

Explanation:

Because they consist of lattice of atoms with free electrons and these free electrons allows current to flow through.

5 0
3 years ago
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