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3 years ago

Which of the following is the best description of the process shown in the image below?

Chemistry

2 answers:

rusak2 [61]3 years ago

5 0

Answer:

Explanation:

VMariaS [17]3 years ago

4 0

Answer:

The answer is c

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Consider this reaction: KOH + HBr - KBr + H20 Which statement is most likely true about HBr?

Roman55 [17]

Answer: It turns blue litmus red

Explanation:

I just got it right on edge

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3 years ago

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At a distance of more than three feet from gun to target, there will generally not be signs of gunpowder on the target.

VikaD [51]

The answer to your question is true

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3 years ago

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A particular oral contraceptive contains 0.038 mg of ethinyl estradiol in each pill. The formula of this compound is C20H24O2. H

Ray Of Light [21]

Answer: The number of molecules of ethinyl estradiol present in one pill are $7.71\times 10^{16}$

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of ethinyl estradiol = 0.038 mg = $3.8\times 10^-5}g$ (Conversion factor: 1 g = 1000 mg)

Molar mass of ethinyl estradiol $(C_{20}H_{24}O_2)=[(20\times 12)+(24\times 1)+(2\times 16)]=296g/mol$

Putting values in above equation, we get:

$\text{Moles of ethinyl estradiol}=\frac{3.8\times 10^{-5}g}{296g/mol}=1.28\times 10^{-7}mol$

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules

So, $1.28\times 10^{-7}mol$ of ethinyl estradiol will contain = $(1.28\times 10^{-7}\times 6.022\times 10^{23})=7.71\times 10^{16}$ number of molecules

Hence, the number of molecules of ethinyl estradiol present in one pill are $7.71\times 10^{16}$

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3 years ago

Does anyone what to talk and don't answer if not

liberstina [14]

Answer:

sure why not

Explanation:

3 0

3 years ago

Which factor increases the amount of water runoff?

bekas [8.4K]

D. impermeable rocks

Explanation:

Impermeable rocks is the factor among the give choices that will increase the amount of water runoff on the surface.

Surface run-off is liquid water that flows and moves on the earth surface.

An impermeable rock is a rock that lacks porosity and permeability.
Porosity is the amount or percentage of void spaces in rock.
Permeability is the inter-connectivity of the pores.
When a rock is impermeable, it will not allow water to infiltrate.

learn more:

Biogeochemical cycle brainly.com/question/3509510

#learnwithBrainly

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4 years ago