3 years ago

Which is the best description of description of speed?

Chemistry

2 answers:

mezya [45]3 years ago

8 0

Answer:

Explanation:

Maksim231197 [3]3 years ago

5 0

The answer is B how fast the objects are

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Carly lives in an area with temperatures that are always very warm. Carly also lives in an area that is close to the equator. Wh

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Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

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The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

Explanation:

Molar mass of of estradiol = M= 272.37 g/mol

Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

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$\frac{x\times 12 g/mol}{272.37 g/mol}\times 100=79.37\%$

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Percentage of oxygen in estradiol :

$\frac{z\times 16 g/mol}{272.37 g/mol}\times 100=11.75\%$

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The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

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How many moles of oxygen are there in 3 moles of Zn(NO3)2? (2 points)

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