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IRISSAK [1]
3 years ago
13

You want to experiment to see how long it takes for water, hydrogen peroxide, and vinegar to boil. You decide heat up 10 mL of w

ater, 20 mL of hydrogen peroxide, and 30 mL of vinegar. Would this experiment be valid? Why or why not?
A) The experiment is invalid because more than one variable in the experiment is changed.

B) The experiment is valid because all necessary variables are controlled appropriately.

C) The experiment is invalid because it is unsafe to heat up hydrogen peroxide.
Chemistry
1 answer:
aleksley [76]3 years ago
6 0

Answer:

B

Explanation:

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What is the most likely source of the carbon dioxide shown in the graph above?
castortr0y [4]

Combustion of fossil fuels

Explanation:

The most likely source of the carbon dioxide shown in the graph is the combustion of fossil fuels for both industrial and domestic use.

  • Fossil fuels are hydrocarbon units.
  • They burn in the presence of oxygen gas to from carbon dioxide and water.
  • The level of carbon dioxide has been increasing dramatically with increase in industrialization.
  • The fuels are used and needed for the workings of machinery.
  • Domestically they are used in heating homes and powering automobiles.
  • These processes produce carbon dioxide as a waste product.

learn more:

Green house gas emission brainly.com/question/4580761

#learnwithBrainly

7 0
3 years ago
Determine the [OH-], pH, and pOH of a solution with a [H+] of 0.090 M at 25 °C. [OH-] = pH = pOH = 0 POH =
ValentinkaMS [17]

Answer : The concentration of OH^- ion, pH and pOH of solution is, 1.12\times 10^{-13}M, 1.05 and 12.95 respectively.

Explanation : Given,

Concentration of H^+ ion = 0.090 M

pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.

The expression used for pH is:

pH=-\log [H^+]

First we have to calculate the pH.

pH=-\log [H^+]

pH=-\log (0.090)

pH=1.05

The pH of the solution is, 1.05

Now we have to calculate the pOH.

pH+pOH=14\\\\pOH=14-pH\\\\pOH=14-1.05=12.95

The pOH of the solution is, 12.95

Now we have to calculate the OH^- concentration.

pOH=-\log [OH^-]

12.95=-\log [OH^-]

[OH^-]=1.12\times 10^{-13}M

The OH^- concentration is, 1.12\times 10^{-13}M

5 0
3 years ago
Read 2 more answers
Which of the following sulfides are insoluble? Select all that apply. Select all that apply. A. sodium sulfide lead(II) B. sulfi
Yuri [45]

Answer:

b.

Explanation:

4 0
3 years ago
9. Circle the atom in each pair that has the greater ionization energy.
Sedbober [7]
A: BE has more ionization energy than LI

B: CA has more ionization energy than BA.
C: NA has more ionization energy than K

D: AR has more ionization energy than P

E: CI has a more ionization energy than SI
F: LI has more ionization energy than K


If any of these are wrong feel free to correct me in the comments.
7 0
2 years ago
The correct mathematical expression for finding the molar solubility (s) of sn(oh)2 is:
lara [203]
Answer is: Ksp = 4s³.
Balanced chemical reaction (dissociation) of strontium hydroxide:
Sr(OH)₂(s) → Sr²⁺(aq) + 2OH⁻(aq).
Ksp(Sr(OH)₂) = [Sr²⁺]·[OH⁻]².<span>
[</span>Sr²⁺] = s.<span>
[</span>OH⁻] = [Sr²⁺] = 2s<span>
Ksp = (2s)² · x = 4s³.
Ksp is the solubility product constant for a solid substance dissolving in an aqueous solution.
[</span>Sr²⁺] is equilibrium concentration of iumcations.<span>
[</span>OH⁻] is equilibrium concentration of hydroxide anions.
7 0
3 years ago
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