3 years ago

Why is it important to inhale through your nose?

1 answer:

7 0

Hi there! Your mouth can take in oxygen, so A is out. Your nose cleans the air you breathe, and gets rid of foreign particles (dust, pollen, etc), which is why you sneeze to get those things out. Breaking down oxygen doesn’t make any sense. The answer is B.

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Name two units for density? I need help!!!!

yaroslaw [1]

Answer:

Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.

Explanation:

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3 years ago

WILL MAKE BRAINEST

Elanso [62]

V=84.0 mL = 84.0 cm³
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3 years ago

What is the mass of helium atom whose atomic weight is 4.003 g/mol?

tino4ka555 [31]

Answer:

Atoms He (Avogadro’s number) → Moles of He (molar mass of He) → Mass of He

• molar mass of He (from the periodic table) = 4.003 g/mol

• Avogadro’s Number: Avogadro’s number gives us the number of entities present in 1 mole: 6.022 × 1023 He atoms in 1 mole of He

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3 years ago

If you pour water into a hot metal pan, the water will absorb heat energy from the pan. Will the water come to the same temperat

Marina CMI [18]

Answer:

Yes

Explanation:

It is heating up both

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3 years ago

The range in size of most atomic radii is approximately what?

Nastasia [14]

It is approximately 10 ^ -10

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4 years ago