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3 years ago

I will give brainliest (8th grade)

Chemistry

1 answer:

lesya [120]3 years ago

3 0

Answer:

2.The cooling effects of more indirect sunlight cause autumn and winter. Because of the Earth's approximately 23.5º tilt, the seasons in the Northern and Southern Hemispheres are reversed, about six months apart from each other.

3.In North America, around June 21, Earth tilts on its axis toward the Sun. That means that at the northern summer solstice, North America will experience summer, and winter will start in in the Southern Hemisphere. Winter Solstice. Around December 21, the Northern Hemisphere tilts the farthest away from the Sun.

Explanation:

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Energy from the sun travels to the earth through

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Answer:

D. Infrared Radiation

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3 years ago

Heart, 5 stars, and Brainiest to first right answer!

Marianna [84]

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3 years ago

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What is an example of a physical change involving iron?

tatiyna

Melting iron would be a physical change

Iron rusting would be a chemical change

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3 years ago

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19. What is sthe mass of 6.02 x 1024 atoms

alekssr [168]

The mass of magnesium in $6.02 \times 10^{24}$ atoms is 240 g.

Answer: Option A

<u>Explanation:</u>

First, we have to convert the atoms to moles of magnesium.

We know that $6.02 \times 10^{24}$ atoms are present in 1 mole of magnesium. So,

$\text { 1 atom }=\frac{1}{6.02 \times 10^{24}} \text { moles }$

$6.02 \times 10^{24} \text { atoms }=\frac{6.02 \times 10^{24}}{6.02 \times 10^{23}} \text { moles }=10 \text { moles }$

Thus,

$Mass of M g= molar mass of M g \times No. of moles of M g$

$\text { Mass of } M g=24 \times 10=240 g$

Thus, 240 g of Magnesium is present in $6.02 \times 10^{24}$ atoms.

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3 years ago

When scientists say that a theory can never be proven, what are they actually saying?

Lelu [443]

They are saying that every theory can eventually be changed a bit due to further research. It does not mean the theory is bad, just that it can become better.

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3 years ago