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Tju [1.3M]
2 years ago
9

I need help on number 3. Thanks

Chemistry
2 answers:
jek_recluse [69]2 years ago
6 0

The process that changes light energy to chemical energy is photosynthesis.

Anika [276]2 years ago
4 0
When it begins to have a chemical affect
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Hi May I know what is the answer and how to get it
Trava [24]

Answer:

D

Explanation:

When lead ions and sulfate ions bond, they form sediment so neither a nor b can be the answer.

The important thing is that two nitrate ions were originally bonded with one lead ion, while two potassium ions bonded with a sulfate ion.

Finally, since potassium and nitrate ions don't form sediment these two ions must remain. Therefore the answer is D

8 0
2 years ago
The Moon is smaller than Earth. Why does the Moon have less gravity than Earth?
ipn [44]
C is the answer the moon has less mass than earth
3 0
3 years ago
Calculate the average reaction rate expressed in moles h2 consumed per liter per second
djyliett [7]

Answer:

Average rate of reaction expressed in moles H₂ consumed per liter per second = 0.0025 M/s = 0.0025 mol/L.s

Explanation:

The complete, correct Question, is presented in the attached image to this answer.

The average rate of reaction in terms of the reactant is defined as the total amount of reactant consumed over a period of time divided by total period of time.

Mathematically,

Average rate of reaction = (change in concentration of H₂ over a period of time) ÷ (total period of time)

Average rate of reaction = (-ΔC)/(Δt)

The minus sign is there because the concentration of reactants reduce with time.

change in concentration of H₂ = -ΔC

= -(0.02 - 0.03) = 0.01 M

Time = Δt = 4 - 0 = 4.0 s

Average rate of reaction = (0.01/4) = 0.0025 M/s

We could solve for the average rate of reaction expressed in moles Cl₂ consumed per liter per second

change in concentration of Cl₂ = -ΔC

= -(0.04 - 0.05) = 0.01 M

Time = Δt = 4 - 0 = 4.0 s

Average rate of reaction = (0.01/4) = 0.0025 M/s = 0.0025 mol/L.s

Hope this Helps!!!

8 0
3 years ago
When a reaction takes place in a SEALED FLASK,<br> the TOTAL MASS of the system...
Doss [256]
It should remain constant because of the law of conservation of mass and because the flask is sealed no mass will escape
7 0
3 years ago
Which of the following chemical equations represents an oxidation-reduction reaction?
zimovet [89]
C. Represents an oxidation-reduction reaction
7 0
3 years ago
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