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Rama09 [41]
2 years ago
13

How many molecules are there in 21.4 grams of Ca(OH)2?

Chemistry
1 answer:
nata0808 [166]2 years ago
4 0

The answer would be 0.288827452320528

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What is the longitude of the international date line
sveta [45]

Answer:

The International Date Line passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south 

line on the Earth. It is located halfway round the world from the prime meridian—the zero degrees longitude established in Greenwich

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3 years ago
In this forest, trees block much of the sunlight from reaching the ground. The branches of trees grow up and out to reach as muc
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8 0
3 years ago
Derivative for tan(x)
Maksim231197 [3]

Answer:

  • sec² (x)

Explanation:

Use the trigonometric ratio definition of the tangent function and the quotient rule.

  • tan(x) = sin(x) / cos(x)

Quotient rule: the derivative of a quotient is:

  • [the denominator × the derivative of the numerator less the numerator × the derivative of the denominator] / [denominator]²

  • (f/g)' = [ g×f' - f×g'] / g²

So,

  • tan(x)' = [ sin(x) / cos(x)]'
  • [ sin(x) / cos(x)]' = [ cos(x) sin(x)' - sin(x) cos(x)' ] / [cos(x)]²

                                   = [ cos(x)cos(x) + sin(x) sin(x) ] / [ cos(x)]²

                                   = [ cos²(x) + sin²(x) ] / cos²(x)

                                   = 1 / cos² (x)

                                   = sec² (x)

The result is that the derivative of tan(x) is sec² (x)

4 0
2 years ago
How many moles are present in a 24.5 gram sample of K2Cr2O7?
attashe74 [19]
The answer to this is solved through stochiometry: the answer is  this: 0.0833mol

6 0
3 years ago
To which group of alcohols does 3,4-dimethyl-2-pentanol belong?
dsp73

Answer:

The answer is A

Explanation:

8 0
2 years ago
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