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m_a_m_a [10]
3 years ago
10

Why is the sun colder in winter?

Chemistry
1 answer:
Sphinxa [80]3 years ago
5 0

Answer:

ummm the sun isn’t colder in winter actually the sun continues to get hotter every day?

its colder in winter because were roating further away From the sun…

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Help! I need to finish work. Brainlist will be given to the most helpful!
Soloha48 [4]

Answer:

1. matches with elements.

2. matches with compounds.

3. matches with atoms

4. matches with weight

5. matches with gas

6. matches with carbon dioxide

7. matches with Mendeleev (there's an element named after him)

8. matches with IUPAC

Hope that helped :)

7 0
3 years ago
What is the mole ratio of N2 to NO2 in the question ... N2 + 2O2-> 2NO2
GREYUIT [131]
The reaction equation is already balanced. So the mole ration of reactants and production is the ratio of the coefficients. So the mole ratio of N2 to NO2 is 1:2.
3 0
3 years ago
Which isotope is used to date ancient artifacts such as fossils?
RideAnS [48]

Scientists use carbon-14 to date ancient fossils.

Plants and animals absorb carbon-14 produced by cosmic rays. The ratio of C-14 to C-12 is constant when they are alive.

When they die, the C-14 decays to C-12, and the ratio changes.

Carbon-14 has a half-life of 5730 years. Thus, the object loses half its C-14 every 5730 years.

Scientists can use the C-14 to C-12 ratio to date fossils up to 70 000 years old.

6 0
3 years ago
This is a specific type of dipole-dipole force that exists between molecules with hydrogen atoms and molecules with nitrogen, ox
RoseWind [281]
Answer:  This description refers to:  "hydrogen bonding" .
______________________________________________________

         
<u>  Hydrogen bonding  </u> is a specific type of "dipole-dipole force" that exists <u /><em><u>between</u> </em> [molecules with hydrogen atoms]  <em><u>and</u> </em> [molecules with nitrogen, oxygen, or fluorine atoms.] .
______________________________________________________
5 0
3 years ago
Read 2 more answers
How many moles of CaCI are present in 60.0mL of a 0.10 M CaCI2 solution?
balandron [24]

Answer:

0.006 mol of CaCl2 are present

Explanation:

Use dimensional analysis for this:

60.0 mL CaCl2/1  * 1 L/1000 mL * 0.10 mol/1 L = 0.006 mol

If you were to write this as fractions out on paper, you'll see that all of the units will cancel out and you'll be left with moles of CaCl2.

**REMEMBER** that molarity (M) is talking about how many moles of that substance is present in one Liter of solvent.

Hope this helps :)

4 0
3 years ago
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