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Mekhanik [1.2K]
3 years ago
13

If you need some points and are good at science help!

Chemistry
2 answers:
fomenos3 years ago
8 0

Answer:

2, 3 They are closest to the equator, and the equator marks to hottest places on earth.

Explanation:

I hope this helps you.

bonufazy [111]3 years ago
6 0

Answer:

region 2 and region 3

Explanation:

you can tell by the color of the land my friends^^

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Given example of the model used in science that is larger than the real object and an example of a model that is smaller than th
e-lub [12.9K]
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A lithium atom contains 3 protons,4neutrons and 3 electrons.What would be formed if a proton was added to this atom.
slega [8]

Answer:

Adding one proton to an atom of lithium with 3 protons, 4 neutrons and 3 electrons would form a _beryllium ion_. The new atom have 4 protons and 4 neutrons since Be has a mass number of 9 then it has to form an ion. Hope this helps! PLEASE GIVE ME BRAINLIEST!!!! =)

8 0
3 years ago
How many moles are in 1.9 x 1046 atoms of chromium?
faust18 [17]

Answer:

<h2>3.156 × 10²² atoms</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.9 \times  {10}^{46} }{6.02 \times  {10}^{23} }  \\  = 3.156 \times  {10}^{22}

We have the final answer as

<h3>3.156 × 10²² atoms</h3>

Hope this helps you

8 0
3 years ago
How many atoms are present in 0.35 mol of carbon dioxide?
STatiana [176]
0.35 moles carbon dioxide (6.022 X 10^23/1 mole CO2) = 2.1 X 10^23 atoms of
<span> carbon dioxide </span>
6 0
3 years ago
Read 2 more answers
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