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Alex_Xolod [135]
3 years ago
10

A microwave works by focusing microwave light on the food inside of it. Which type of energy transformation takes place in a mic

rowave? A. Heat energy is transformed into light energy. B. Electrical energy is transformed into light energy. C. Heat energy is transformed into electrical energy. D. Light energy is transformed into electrical energy
Chemistry
2 answers:
Inessa [10]3 years ago
7 0

Answer:

B. Electrical energy is transformed into light energy.

nasty-shy [4]3 years ago
3 0

Answer:

C is the answer

Explanation:

Heat energy is transformed into electrical energy.

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What is the pH of a solution with a H+ ion of 2×10-¹²?​
kap26 [50]

Answer:

11.7

Explanation:

The pH is the negative logarithm of the concentration of H+ ions. If the concentration is 2×10-¹² the the pH will be -log(2×10-¹²) which is 11.698 which can be round up to 11.7.

5 0
3 years ago
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9966 [12]
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5 0
3 years ago
What is the molality of a solution that is obtained by dissolving 2.922 g of NaCl into 1000.0 g of water if the molar mass of Na
never [62]
In order to find molarity, you must first find the number of moles that was dissolved.

Now, Moles = Mass ÷ Molar Mass
                   
⇒  Moles of NaCl  = 2.922 g ÷ 58.44 g/mol 
                       
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∴ the Molarity of the NaCl is 0.05 M [Option 1]
4 0
3 years ago
The rate constant for this second‑order reaction is 0.610 M − 1 ⋅ s − 1 0.610 M−1⋅s−1 at 300 ∘ C. 300 ∘C. A ⟶ products A⟶product
Darya [45]

Answer: It takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

Explanation:

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

k = rate constant = 0.610M^{-1}s^{-1}

a_0 = initial concentration = 0.860 M

a= concentration left after time t = 0.260 M

\frac{1}{0.260}=0.860\times t+\frac{1}{0.860}

t=3.120s

Thus it takes 3.120 seconds for the concentration of  A to decrease from 0.860 M to 0.260 M.

8 0
3 years ago
Which statement correctly describes an endothermic chemical reaction?
Natasha2012 [34]
An endothermic chemical reactions products tend to have a higher potential energy than the reactants. Thus making the /\ H positive, not negative. 
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3 years ago
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