All categories

3 years ago

Which is the electron configuration for lithium? A. 1s2 B. 2s3 C. 1s22s1 D. 1s12s2

Chemistry

2 answers:

gladu [14]3 years ago

5 0

Answer:

its c i think

Explanation:

tensa zangetsu [6.8K]3 years ago

3 0

C. 1s22s1 is your answer.

You might be interested in

Living things are classified as producers or consumers according to

Makovka662 [10]

Answer:

Explanation:

Your welcome! Have a great day!

3 0

3 years ago

Read 2 more answers

A hydrated salt is a solid that includes water molecules within its crystal structure. A student heated a 12.10-gram sample of a

sveticcg [70]

Answer : The percent by mass of water the salt contain is, 55.3 %

Explanation : Given,

Mass of hydrated salt = 12.10 g

Mass of salt = 5.41 g

First we have to calculate the mass of water.

Mass of water = Mass of hydrate salt - Mass of salt

Mass of water = 12.10 g - 5.41 g

Mass of water = 6.69 g

Now we have to calculate the percent by mass of water the salt contain.

$\text{Percent by mass of water}=\frac{\text{Mass of water}}{\text{Mass of hydrate salt}}\times 100$

Now put all the given values in this expression, we get:

$\text{Percent by mass of water}=\frac{6.69g}{12.10g}\times 100$

$\text{Percent by mass of water}=55.3\%$

Therefore, the percent by mass of water the salt contain is, 55.3 %

5 0

3 years ago

Chemistry help. I need help with an assignment due in 20 minutes.

jasenka [17]

Answer:

wheres the pic of it?

Explanation:

4 0

3 years ago

In a closed system, If a gas is transported to a container with double the volume of the previous container, the gas was held in

Maslowich

If it goes from a volume of x, then when the volume is doubled it will go to a volume of 2x. If you meant what happens to the pressure, then the pressure halves as volume doubles due to Boyle's law.

7 0

3 years ago

Read 2 more answers

Which of the following conversion factors is correct to convert 0.25 moles of Na to particles of Na?

Stolb23 [73]

Answer:

6.02×10²³ particles / 1 mol

Explanation:

In this question the choices are missed.

For determine the particles of Na, in 0.25 moles we should know that the mole referrs to the Avogadro's number.

1 mol of anything contains 6.02×10²³ entities, that's why we should apply this conversion factor to find the final answer:

0.25 mol . 6.02×10²³ particles / 1 mol = 1.50×10²³ particles

In conclussion: 1.50×10²³ particles of Na are contained in 0.25 moles of Na

5 0

4 years ago