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ad-work [718]
3 years ago
15

The average atomic mass of a sample of an element X is 16.2u. What are the percentages of isotopes X (mass number 16, atomic num

ber 8) and X (mass number 16, atomic number 8) in the sample?
Chemistry
1 answer:
belka [17]3 years ago
8 0

Answer:

isotopes of hydrogen are protium,deuterium and tritium

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1. A dining hall had a total of 25 tables-some long rectangular tables and some round
TEA [102]

x = 20 long tables

y = 5 round table

Explanation:

We have the following system of equations:

x + y = 25

8x + 6y = 190

From the first equation we have:

x = 25 - y

And we replace x in the second equation:

8(25 - y) + 6y = 190

200 - 8y + 6y = 190

200 - 2y = 190

200 - 190 = 2y

10 = 2y

y = 5

Now we insert the value of y in the next equation:

x = 25 - y

x = 25 - 5

x = 20

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system of equations

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The ease with which the charge distribution in a molecule can be distorted by an external electric field is called the___. A) el
muminat

Answer:

Question 1

C) polarizability

Question 2

C) London dispersion forces

Question 3:

D)Kr

Question 4:

E) strong enough to hold molecules relatively close together but not strong enough to keep molecules from moving past each other

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3 years ago
If the temperature of a gas increased and the pressure remains the same what happens to the volume of gas?​
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Answer:

the answer is B.

Explanation:

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What is the ultimate end of a high mass star that has a core about 2.8x the mass of our sun?
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Answer:

A

Explanation:

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