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ololo11 [35]
3 years ago
9

2-- What is the [H3O+] in a solution with [OH-] = 1 x 10-12 M?​

Chemistry
1 answer:
Arte-miy333 [17]3 years ago
5 0

Answer:

The answer is 0.01 M

Explanation:

The problem is solved by applying the expression for ionic product of water as follows:

Kw = [H₃O⁺] [OH⁻]

Where Kw is the ionic product of water and it is 1.10⁻¹⁴ M at⁴ 25ºC. As [OH⁻]= 1.10⁻¹² M, [H₃O⁺] will be:

[H₃O⁺]= Kw/ [OH⁻]= 1.10⁻¹⁴M/1.10⁻¹²M= 0.01 M

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Hydrocarbons, compounds containing only carbon and hydrogen, are important in fuels. The heat of combustion of cyclobutane, C4H8
Gennadij [26K]

Answer:

1. C4H8 + 6O2  -----> 4CO2 + 4H20

2. 3836.77 kcal

Explanation:

1. Balanced equation for the complete combustion of cyclobutane:

C4H8 + 6O2  -----> 4CO2 + 4H20

2. Heat of combustion of cyclobutane = 650.3 kcal/mol

    Molecular weight of cyclobutane, C4H8 = 56.1 g/mol

   Mole of C4H8 : mass of cyclobutane/Molecular weight of cyclobutane

  Mole of C4H8 = 331/56.1 = 5.9 mol

Energy released during combustion =  5.9 mol × 650.3 kcal/mol = 3836.77kcal

Therefore the energythat  is released during the complete combustion of 331 grams of cyclobutane is 3836.77kcal

8 0
3 years ago
A 100 watt solar power panel usually costs $146 they are on sale for 0.75 of the regular price what is the sale price
gregori [183]
Answer: $109.5
Multiply $146 (original price) by 0.75 (the percentage) and there’s your answer!
8 0
2 years ago
Combustion analysis of toluene, a common organic solvent, gives 4.69 mg of co2 and 1.10 mg of h2o. if the compound contains only
BartSMP [9]
CₓHₐ + (x+a/4)O₂ = xCO₂ + a/2H₂O

n(CO₂)=4.69 mg/44.01 mg/mmol = 0.1066 mmol

n(H₂O)=1.10 mg/18.02 mg/mmol = 0.06104 mmol

C : H = 0.1066 : 0.06104*2 = 0.1066 : 0.12208 = 1 : 1.1453 = 7 : 8

C₇H₈ + 9O₂ = 7CO₂ + 4H₂O

C₇H₈
4 0
3 years ago
Read 2 more answers
When two protons and two neutrons combine to form 4He, it is found that this helium nucleus is less massive than the sum of the
Fynjy0 [20]

Answer:

Explanation:

This signifies a defect in mass. The phenomenon is known as mass defect. Mass defect is compares the mass of an isotope to that of the nucleons in the nucleus.

The mass defect implies the energy that was given off when the protons and neutrons combine to form the new helium atom. The mass defect helps us to understand why the mass of an atom might not eventually correspond to what we obtain theoretically by calculation.

3 0
3 years ago
Pls help with me who is good in science!!!​
anzhelika [568]

Here are my answers since I examined the questions.

Question 1.

No! as a matter of fact, the Rock cycle has no Beginning and No End it's an infinite loop.

Question 2.

The Rock cycle can happen in both ways such as, Volcanic rock melts and cool downs happen quite quickly as in others happen slower.

Question 3.

The 4 Major Steps of the rate of change are, Weathering, Transportation, Deposition, And Compaction.

Question 4.

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Question 5.

The Parent Rock and the Pressure/temperature conditions.

These all my answers for this project, Good Luck.

7 0
2 years ago
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