2 years ago

The rays of the sun strike the Earth less directly during winter in the Northern Hemisphere?

1 answer:

8 0

The sun's rays hit the Earth at a extreme angle, which causes the days to become shorter, so yes, the sun's rays do hit the Earth at a extreme angle.

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How many grams is 20 moles of (nh4)2so4 please show work

ryzh [129]

n=20 mol

(NH)4 SO4

Atomic masses :

N- 14

H- 1

S- 32

O- 16

Therefore M= 14×2 + 1×8 + 32 + 16×4

= 132

m= nM

= 20×132

= 2640g

5 0

1 year ago

A particular state of matter has atoms that are packed closely together and vibrating in fixed positions. A phase change occurs

creativ13 [48]

Answer:

it goes to a solid to a liquid

Explanation:

When something is a solid the molecules are impact together and have a small sense of vibration. But as the solid melts away for example ice, the molecules become more loose forming into a liquid

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2 years ago

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sample of substance X has a mass of 326.0 g releases 4325.8 cal when it freezes at its freezing point. If substance X has a mola

ELEN [110]

Number of moles ( substance x ):

1 mole --------- 58.45 g/mol
? mole --------- 326.0 g

326.0 x 1 / 58.45 => 5.577 moles

heat of fusion:

hf = Cal / moles

hf = 4325.8 Cal / 5.577 moles

hf = 775.65 cal/mol

hope this helps!

5 0

3 years ago

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Earthquake damage causes two rabbits to be separated from the rest of the rabbits in their large habitat. They have no way to ge

Sati [7]

The animals have to adapt to their new environment meant and continue mating so they do not go extinct

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2 years ago

Liquid particles move faster than gas particles.<br><br> a. True<br><br> b. False

Fudgin [204]

Answer:

False

Explanation:

Liquid particles move fast but they move slower than gas particles. Gas particles move faster than liquid particles because it has more kinetic energy than liquid particles.

3 0

2 years ago

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