2 years ago

Which of the following explain why it is important to conserve both types of natural resources?

Chemistry

2 answers:

Bezzdna [24]2 years ago

7 0

It’s A.Cutting down too many trees in an area removes them faster then they can grow

stealth61 [152]2 years ago

4 0

Answer is a. Just qnswered this

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allochka39001 [22]

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3 years ago

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zubka84 [21]

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3 years ago

Elements in the same group have all of these in common

scoundrel [369]

elements in the same group all have the same number of electrons in their outermost shell

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3 years ago

a sample of compound determined to contain 1.71 g C and 0.287 g H. The corresponding empirical formula is

fiasKO [112]

Answer: The empirical formula is $CH_2$ .

Explanation:

Mass of C = 1.71 g

Mass of H = 0.287 g

Step 1 : convert given masses into moles.

Moles of C = $\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{1.71g}{12g/mole}=0.142moles$

Moles of H = $\frac{\text{ given mass of H}}{\text{ molar mass of H}}= \frac{0.287g}{1g/mole}=0.287moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = $\frac{0.142}{0.142}=1$

For H = $\frac{0.287}{0.142}=2$

The ratio of C: H = 1: 2

Hence the empirical formula is $CH_2$ .

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3 years ago

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trapecia [35]

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the answer is B, "summer, winter"

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3 years ago