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alexandr402 [8]
2 years ago
8

Which of the following solutions represents a good buffer system? a solution that is 0.10 mol L-1 NaOH and 0.10 mol L-1 KOH a so

lution that is 0.10 mol L-1 HCl and 0.10 mol L-1 NH4+ a solution that is 0.10 mol L-1 HF and 0.10 mol L-1 CH3COONa a solution that is 0.10 mol L-1 HCl and 0.10 mol L-1 KCl a solution that is 0.10 mol L-1 CH3COOH and 0.10 mol L-1 CH3COOLi
Chemistry
1 answer:
Goshia [24]2 years ago
4 0

Answer:

chu papi

Explanation:

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The following thermochemical equation is for the reaction of methane(g) with water(g) to form hydrogen(g) and carbon monoxide(g)
Andrei [34K]

Answer:

54.075KJ

Explanation:

Since methane is the limiting reactant.

From the reaction equation,

16 g of methane absorbs 206 KJ of energy

4.20 g of methane will absorb 4.20 × 206/16 = 54.075KJ of energy was absorbed.

From the equation, the value of the enthalpy of reaction is positive, this means that energy is absorbed in the reaction of methane and water. Hence the answer.

6 0
3 years ago
When K-37 undergoes positron emission, what is the resulting atom?
natita [175]

Answer:

C) Ar-37

Explanation:

A positron is a positively charged electron. It has the same mass as that of an electron, but opposite charge. It is the counterpart of an electron.

The reaction involving the emission of a positron by k-37 would produce a Ar-37, which is an unstable isotope of Argon. In this emission, there must not be a particle loss or creation, the addition of the mass number and proton number on LHS must be the sane as that on RHS of the equation.

An isotope is ability of an element to exist in two or more forms with the same atomic number but different mass number.

4 0
3 years ago
Which of these is an example of a reaction that absorbs energy?
Levart [38]

Answer:

I think its B

Explanation:

because a energy that occurs is thermal energy

6 0
3 years ago
What is the molecular formula of sodium peroxide by criss cross method​
8090 [49]

Answer:

Na2O2

the formula of sodium peroxide

7 0
2 years ago
A substance with a high activation energy is expected to have a _____ reaction rate.
GrogVix [38]

Answer:

A substance with a high activation energy is expected to have a slow reaction rate.

8 0
2 years ago
Read 2 more answers
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