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Yuliya22 [10]
3 years ago
8

Please Help Thank You

Chemistry
2 answers:
Stells [14]3 years ago
7 0
Its gonna be to learn about history on earth
Nikitich [7]3 years ago
5 0
The first option is the correct answer. Fossils belong to dinosaurs that lived in B.C/A.D, which scientists study to learn about Earth's prehistoric times.
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3 years ago
Why parafin oil use in melting
MatroZZZ [7]

Answer:

Paraffin oil is used for determination of boiling point and melting point for the following reasons: It has a very high boiling point and so it can be used to maintain high temperatures in the boiling and melting point apparatus without loss of the substance.

4 0
2 years ago
The international space station (ISS) orbits in this layer of Earth's atmosphere.
garri49 [273]

Answer:

D thermosphere

Explanation:

The thermosphere is home to the International Space Station as it orbits Earth. This is also where you'll find low Earth orbit satellites

3 0
3 years ago
How many grams would 3.36 × 1023 molecules of copper (II) sulfate (CuSO4) weigh?
Semenov [28]
Molar mass ( CuSO₄) = 159.609 g/mol

159.609 g ----------------- 6.02 x 10²³ molecules
         ? g ------------------ 3.36 x 10²³ molecules

mass = ( 3.36 x10²³) x 159.609 / 6.02 x 10²³

mass = 5.36 x 10²⁴ / 6.02 x 10²³

mass = 8.90 g 

hope this helps!
3 0
3 years ago
Read 2 more answers
_Na+ Cl2 - -&gt; _NaCl<br><br> A 2,4<br> B 1,2<br> C 3,3<br> D 2,2
Natali [406]

Answer:

D 2,2

Explanation:

We can see that there are 2 chlorines on the reactant side so there has to be a 2 on the product side

Now we have Na + Cl2 --> 2NaCl

The problem now is that there are 2 sodiums on the product side so add a 2 to the Na on the reactant side

2Na + Cl2 --> 2NaCl

Now it's balanced!

4 0
2 years ago
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