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sergeinik [125]

3 years ago

6

Calculate the number of miles in 39 g silicon

1 answer:

Semenov [28]3 years ago

3 0

Well what are all the calculations you have

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Is the sun typical of these nearby stars

marshall27 [118]

No the sun is the biggest star in the universe.

8 0

3 years ago

Does the nucleus (protons and neutrons) weigh more than the electrons?

Butoxors [25]

The mass of nucleons (and thus of the nucleus) is roughly 1000 times greater than that of electrons.

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4 years ago

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Explain how cells use digested food in your own words

natima [27]

Answer:

The digestive system uses mechanical and chemical methods to break food down into nutrient molecules that can be absorbed into the blood. ... Some animals use intracellular digestion, where food is taken into cells by phagocytosis with digestive enzymes being secreted into the phagocytic vesicles.

Explanation:

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3 years ago

N2-3H2 → 2NH3

aniked [119]

Answer:

6 mols H2 are needed

Explanation:

N2 = 28.01g/mol

H2 = 2.02g/mol

$\frac{2 mol N_{2} }{1}$ * $\frac{3 mol H_{2} }{ 1 mol N_{2} }$ = 6 mol H2

8 0

3 years ago

3: Consider molecules of hydrogen (tiny ones) and oxygen (bigger ones) in a gas mixture. If they have the same average kinetic e

mezya [45]

Answer: Hydrogen molecules will have greatest average speed.

Explanation:

The formula for average speed is :

$\mu_{av}={\sqrt{\frac{8RT}{\pi\times M}}}$

R = gas constant

T = temperature

M = Molecular Mass

Now putting all the values:

$\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{8RT}{\pi\times M_{H_2}}}/{\sqrt{\frac{8RT}{\pi\times M_{O_2}}}$

$\frac{\nu_{H_2}}{\nu_{O_2}}=\sqrt{\frac{16}{2}}$

$\frac{\nu_{av}_{H_2}}{\nu_{av}_{O_2}}=8$

Thus average speed of hydrogen is 8 times the average speed of oxygen. Thus hydrogen molecules will have greatest average speed

8 0

3 years ago