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ale4655 [162]
3 years ago
5

More Changes of state: Activate 1 p68-69 What is evaporation and how is it different to boiling

Chemistry
1 answer:
IRINA_888 [86]3 years ago
3 0
<span>evaporation is gradual vaporization,whereas </span>boiling<span> is a rapid vaporization of a liquid only when it is heated to its </span>boiling<span> point.</span>
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What is polyethylene??defination​
rewona [7]

Answer:

a tough, light, flexible synthetic resin made by polymerizing ethylene, chiefly used for plastic bags, food containers, and other packaging.

Explanation:

8 0
3 years ago
Read 2 more answers
What is the empirical formula for a compound that is 83.7% carbon and 16.3% hydrogen?
zubka84 [21]
Hello!

We use the amount in grams (mass ratio) based on the composition of the elements, see: (in 100 g solution)

C: 83.7% = 83,7 g 
H: 16.3% = 16.3 g 

Let us use the above mentioned data (in g) and values will be ​​converted to amount of substance (number of moles) by dividing by molecular mass (g / mol) each of the values, lets see:

C:  \dfrac{83.7\:\diagup\!\!\!\!\!g}{12\:\diagup\!\!\!\!\!g/mol} \approx 6.975\:mol

H: \dfrac{16.3\:\diagup\!\!\!\!\!g}{1\:\diagup\!\!\!\!\!g/mol} = 16.3\:mol

We note that the values ​​found above are not integers, so let's divide these values ​​by the smallest of them, so that the proportion is not changed, let's see:

C:  \dfrac{6.975}{6.975} = 1

H:  \dfrac{16.3}{6.975} \approx 2.3

Note: So the ratio in the smallest whole numbers of carbon to hydrogen is 3:7, t<span>hus, the minimum or empirical formula found for the compound will be:
</span>
\boxed{\boxed{C_3H_7}}\end{array}}\qquad\checkmark

I hope this helps. =)
8 0
2 years ago
How many grams of NO can be made from 50 g of NH3?<br><br> 4 NH3 + 5 O2 → 6 H2O + 4 NO
Evgen [1.6K]
0.08 because 4mol NO divided by 50g gives you your answer
4 0
2 years ago
Electrons is an excited state are more likely to enter into chemical reactions.
Alex17521 [72]

A. True would be the best answer

3 0
2 years ago
Express in scientific notation. Remember, M must be a number such that 1 -<br><br><br> 0.000000000000013= ____
Alex

Answer:

A) 1.3 * 10^-13

Explanation:

0.000000000000013 = 1.3 * 10^-13

5 0
1 year ago
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