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noname [10]
3 years ago
10

The winner of the 20 km race ran at an average speed of 4 m / s. How long did he take to complete the race?

Chemistry
1 answer:
Amanda [17]3 years ago
4 0

Answer: 5, 000s

Explanation:

Distance 20km=20,000m

Speed 4m/s

Time =?

Speed = distance / time

4 = 20, 000/ x

Cross multiply

4x=20, 000

X = 5, 000

X = time = 5, 000

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It breaks down into multiple elements

Explanation:

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The answer should be I and III

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A certain half-reaction has a standard reduction potential E0red = +0.13V . An engineer proposes using this half-reaction at the
Ivan

Answer:

a. 1.23 V

b. No maximum

Explanation:

Required:

a. Is there a minimum standard reduction potential that the half-reaction used at the cathode of this cell can have?

b. Is there a maximum standard reduction potential that the half-reaction used at the cathode of this cell can have?

The standard cell potential (E°cell) is the difference between the standard reduction potential of the cathode and the standard reduction potential of the anode.

E°cell = E°red, cat - E°red, an

If E°cell must be at least 1.10 V (E°cell > 1.10 V),

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E°red, cat > 1.23 V

The minimum standard reduction potential is 1.23 V while there is no maximum standard reduction potential.

4 0
3 years ago
Can someone help me with this one
jek_recluse [69]

Answer:

Easy my dude let me help you out

A.In

B.27

C.73

D.49

E.56

F.56

G.114

H.180

Also with protons and electrons they equal the same atomic number

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