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VashaNatasha [74]
3 years ago
11

Approximately how old is the Sun?

Chemistry
2 answers:
malfutka [58]3 years ago
5 0
The answer is C. 4.6 billion years. Hoped I helped. :)
kupik [55]3 years ago
3 0
The sun is 4.6 billion years!!..!
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Calculate each of the following quantities.<br> (a) mass in kilograms of 3.7 x 1020 molecules of NO2
HACTEHA [7]

Answer:

The answer to your question is:  0.028 kg of NO2

Explanation:

Data

3.7 x 10²⁰ molecules of NO2 in kg

MW of NO2 = 14 + (16 x 2) = 14 + 32 = 46 kg

                   1 mol of NO2 ---------------------  6.023 x 10 ²³ molecules

                   x                     --------------------- 3.7 x 10²⁰ molecules

                   x = 3.7 x 10²⁰ x 1 / 6.023 x 10 ²³

                   x = 0.00061 mol

         

                 1 mol of NO2 ---------------------  46 kg of NO2

                 0.00061 mol     ------------------    x

                 x = 0.00061 x 46/1

                x = 0.028 kg of NO2

7 0
3 years ago
Polywool fibre is<br> a.natural<br> b.synthetic<br> c.monomer<br> d.blended​
Mademuasel [1]
<h2><u>Answer</u> : - </h2>

Polywool fibre is <u>synthetic</u>.

⇒b. Synthetic

Hope It Helps You ✌️

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Imagine you are celebrating a birthday in December and need balloons. The temperature in the
natka813 [3]
So I think that this is very cool elsewhere think that it’s also a little bit cool so you’re selling birthday OK the pressure is definitely 25 and the 2 L so basically the answer is five so everything is great that’s the answer
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Which characteristic gives the most information about what kind of element
Oliga [24]

Answer:

A. The atomic number

5 0
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Please help me i dont know this one. this is part of my science final​
elixir [45]
The answer is D because there are different molecules, and you need two or more different things in a compound.
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3 years ago
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