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Romashka-Z-Leto [24]
3 years ago
14

What is an example of a community protecting Earth's resources? (2 points)

Chemistry
1 answer:
Lerok [7]3 years ago
7 0

D. A town has started a new recycling and composting program

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Identify the gas that has a root mean square velocity of 412 m/s at 191 K (potassium)
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Gas pump is the main reason 177m 192 k
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3 years ago
__________ often cause overactive eye movement. A. Stimulants B. Depressants C. Barbiturates D. None of the above
jeka57 [31]

<u>Stimulants </u> often cause overactive eye movement

Ans (A)

Stimulants are a class of psychoactive drugs that increase the brain activity. They work by acting on the central nervous system and increase the level of mental alertness and impart heightened cognitive functions. Stimulants like nicotine and cocaine cause overactive eye movement.

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3 years ago
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Suppose 550.mmol of electrons must be transported from one side of an electrochemical cell to another in 49.0 minutes. Calculate
nekit [7.7K]

Answer:

18.0 Ampere is the size of electric current that must flow.

Explanation:

Moles of electron , n = 550 mmol = 0.550 mol

1 mmol = 0.001 mol

Number of electrons = N

N=N_A\times n

Charge on N electrons : Q

Q = N\times 1.602\times 10^{-19} C

Duration of time charge allowed to pass = T = 49.0 min = 49.0 × 60 seconds

1 min = 60 seconds

Size of current : I

I=\frac{Q}{T}=\frac{N\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}

=\frac{n\times N_A\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}

I=\frac{0.550 mol\times 6.022\times 10^{23} mol^{-1}\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}=18.047 A\approx 18.0 A

18.0 Ampere is the size of electric current that must flow.

3 0
3 years ago
Name the type of equation shown here: 2NaBr+Ca(OH)2 —&gt;CaBr2+2NaOH
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A) Double replacement
Because the reactants switch when they become products
6 0
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Which type of radioactive decay can pass through the body? A.alpha emission B.beta emission C.positron emission D.gamma rays
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A beta emission radioactive decay can pass through the body.
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