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garik1379 [7]
3 years ago
14

10. Which statement is the most important reason that some people feel that solar energy power can be a pollution-free energy so

urce? *
A Electricity generation with solar cells produces no pollution.
B Electricity from burning fossil fuels is used to make solar panels.
C Extra materials from the manufacturing process can be collected and reused.
D The raw material for cells is sand, which is easily available without mining
Chemistry
1 answer:
Cerrena [4.2K]3 years ago
8 0

Answer:

b

Explanation:

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Fluorine-18 is a positron emitter used in pet scans. write a balanced nuclear equation for the reaction.
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3 years ago
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A 75.0 g sample of dinitrogen monoxide is confined in a 3.q L vessel. What is the pressure( in atm) at 115 celsius
Nonamiya [84]
Data Given:
                  Pressure  =  P  =  ?

                  Volume  =  V  =  3.0 L

                  Temperature  =  T  =  115 °C + 273  =  388 K

                  Mass  =  m  =  75.0 g

                  M.mass  =  M  =  44 g/mol

Solution:
              Let suppose the Gas is acting Ideally. Then According to Ideal Gas Equation,
                                      P V  =  n R T
Solving for P,
                                      P  =  n R T / V      ------ (1)
Calculating Moles,
                                      n  =  m / M

                                      n  =  75.0 g / 44 g.mol⁻¹

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                    P  =  (1.704 mol × 0.08205 atm.L.mol⁻¹.K⁻¹ × 388 K) ÷ 3.0 L

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7 0
3 years ago
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umka2103 [35]
D all are 1 because the left side equals the right
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Calculate the hydroxide ion concentration of a 0.200 M solution of HCIO4
Aleksandr [31]

The concentration of hydroxide ion is  5  \times 10^ − 14  M.

<u>Explanation:</u>

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Moreover, let's assume that  H C l O 4  is a strong acid and will fully dissociate.

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Now, recall,  

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Which of the following sets contains a substance that could not be used as an acid base indicator?
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