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3 years ago

Why we need gravity explain in your own words

Chemistry

1 answer:

Harlamova29_29 [7]3 years ago

7 0

Answer:

Gravity is very important for us,animals and plants. We could not survive Earth without it. The sun's gravity keeps Earth in orbit around it, keeping us a good distance away from it (the sun). Gravity is holding down our atmosphere and the air we need to breathe along with it.

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What is the most electronegative element?

erma4kov [3.2K]

The most electronegative element is fluorine. <span> And since it is the most electronegative element the electrons tend to "hang out" more toward the fluorine atom when fluorine is covalently bonded to other atoms. Hope this answers the question. Have a nice day.</span>

8 0

3 years ago

Read 2 more answers

Nicotine, a component of tobacco, is composed of C, H, and N. A 5.250-mg sample of nicotine was combusted, producing 14.242 mg o

aev [14]

n - number of mole

M(CO2) = 12.0 +16.0*2 = 44.0 mg/mmol

M(H2O) = 2*1.0 +16.0= 18.0 mg/mmol

1) 14.242 mg of CO2*1 mmol/44.0g =0.32368 mmol CO2

0.32368 mmol CO2 has 0.32368 mmol C

2) 0.32368 mmol C*12 mg/1 mmol= 3.88418 mg C

3) 4.083 mg of H2O * 1 mmol/18 mg = 0.226833 mmol H2O

0.226833 mmol H2O has 2*0.226833 mmol H = 0.453666 mmol H

4) 0.453666 mmol H*1 mg/1mmol = 0.453666 mg H

5) Mass of N = 5.250 mg - 3.88418 mg (C) - 0.453666 mg (H)≈ 0.912 mg N

0.912 mg N * 1 mmol/14.0 mg = 0.0652 mmol N

6) n(C) : n(H) : n(N) = 0.32368 mmol C : 0.453666 mmol H : 0.0652 mmol N

0.0652 mmol N is a smallest value.

n(C) : n(H) : n(N) = (0.32368 mmol/0.0652 mmol) C : (0.453666 mmol H/0.0652 mmol) : (0.0652mmol/0.0652 mmol)N = 5 : 7 : 1

n(C) : n(H) : n(N) = 5 : 7 : 1

Empirical formula : C5H7N.

8 0

3 years ago

Pick out the metals which can react with magnesium sulphate solution. Justify the answer.

KATRIN_1 [288]

Answer: aluminium, mercury , platinum and copper.

Explanation:

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

A general single displacement reaction can be represented as :

$XY+Z\rightarrow XZ+Y$

Thus the metals which are more reactive than magnesium will react with magnesium sulphate solution.

The metals which are more reactive than magnesium are aluminium, mercury , platinum and copper.

4 0

4 years ago

How many total atoms are in 4Al2O3?

Paha777 [63]

Answer:20

Explanation:

5 0

3 years ago

Four properties of water are listed.

vichka [17]

Explanation:

Physical property

1- Water is colorless and odorless in its pure form

6 0

3 years ago

Why we need gravity explain in your own words​

Why we need gravity explain in your own words