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larisa [96]
3 years ago
13

Using the black numbers on the stopwatch to answer the questions.

Chemistry
2 answers:
Andrew [12]3 years ago
8 0

Answer:  The answer to the top one is 5.3 s and the bottom one is tenths of seconds

Explanation: Hope this helps plz mark!! Thx

Rus_ich [418]3 years ago
4 0

Answer: the top one is 5.3 s and the bottom one is tenths of seconds

Explanation:

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Help help help. <br> please help me
inysia [295]

Answer:

D

Explanation:

Solar panels are not toxic, so option A goes out the window.

Aesthetics don't really matter, so option B follows it out.

Option C makes a little sense, but less so than Option D. They aren't nearly as heavy as some of our current energy production methods.

Solar panels are expensive,  hard to store properly, and most are between 15 and 20 percent efficiency, compared with a diesel motor's 40 percent.

4 0
3 years ago
All of the following are benefits of recycling except?
IgorLugansk [536]
Recycling Isn’t Always Cost Effective.
High Up Front Cost
Needs More Global Buy-In.
Recycled Products Are Often of Lesser Quality.
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6 0
3 years ago
Who discovered sodium?
Free_Kalibri [48]
Humphry Davy First discovered sodium


5 0
3 years ago
Read 2 more answers
What is the energy of light with a wavelength of 697 nm?
USPshnik [31]

Answer:

Red 697 nm

384thz-468 the

1.59ev-1.94ev

255zj-310zj

Hopefully I answer yre question

Explanation:

8 0
3 years ago
PLEASE HELP ME SOLVE THIS.Thank you so much!
Tju [1.3M]

Answer: The coefficients for the given reaction species are 1, 6, 2, 3.

Explanation:

The given reaction equation is as follows.

Cr_{2}O^{2-}_{7} + Cl^{-} \rightarrow Cr^{3+} + Cl_{2}

Now, the two half-reactions can be written as follows.

Reduction half-reaction: Cr_{2}O^{2-}_{7} + 3e^{-} \rightarrow Cr^{3+}

This will be balanced as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6e^{-} \rightarrow 2Cr^{3+} + 7H_{2}O ... (1)

Oxidation half-reaction: Cl^{-} \rightarrow Cl_{2} + 1e^{-}

This will be balanced as follows.

6Cl^{-} \rightarrow 3Cl_{2} + 6e^{-} ... (2)

Adding both equation (1) and (2) we will get the resulting equation as follows.

Cr_{2}O^{2-}_{7} + 14H^{+} + 6Cl^{-} \rightarrow 2Cr^{3+} + 3Cl_{2} + 7H_{2}O

Thus, we can conclude that coefficients for the given reaction species are 1, 6, 2, 3.

6 0
2 years ago
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