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Alexeev081 [22]
3 years ago
8

How can i find the number of neutrons in an element ​

Chemistry
2 answers:
lawyer [7]3 years ago
7 0

Answer:

The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number. On the periodic table, the atomic number is the number of protons, and the atomic mass is the mass number.

Explanation:

Ostrovityanka [42]3 years ago
3 0

Answer:

Use the equation N=M-n

Explanation:

N=neuron

M=atomic mass

n=atomic munber

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if a balloon had an initial volume of 100ml at pressure of 3.2 atm and the pressure was decreased to 1.9 atm, what would the new
hram777 [196]

Answer:

168.4 mL

Explanation:

Data Given

initial volume V1 of gas in balloon = 100 mL

initial pressure P1 of gas in balloon = 3.2 atm

final pressure P2 of gas in balloon = 1.9 atm

final volume V2 of gas in balloon = ?

Solution:

This problem will be solved by using Boyle's law equation at constant Temperature.

The formula used

                  P1V1 = P2V2

As we have to find out Volume, so rearrange the above equation

                  V2 = P1V1 / P2

Put value from the data given

V2 = 100 mL x 3.2 atm / 1.9 atm

V2 = 168.4 mL

So the final Volume of gas in baloon =  168.4 mL

4 0
3 years ago
What is the empirical formula of a compound composed of 30.5 g potassium (k) and 6.24 g oxygen (o)?
VLD [36.1K]
K5O2

convert grams to moles, divide both by the smallest mole mass, multiply that until hole.

30.5 g K ÷ 39.10 = .78 mol
6.24 g O ÷ 16 = .39 mol
.78 mol ÷ .39 mol = 2.5
.39 mol ÷ .39 mol = 1
2.5 x 2 = 5
1 x 2 = 2
K5O2

5 0
3 years ago
Convert 7.72 years into days.
Lelu [443]

Answer:2817.8

Explanation:multiply the value by 365

4 0
3 years ago
Read 2 more answers
A sample of hydrogen gas was collected over water. If the total pressure
Brut [27]
It would 47.7 because you would have to both minus the number together.
7 0
2 years ago
How can you balance this chemical equation?HSiCl3+H2O~H10Si10O15+HCL​
qwelly [4]
10HSiCl3 + 15H2O = H10Si10O15 + 30HCl
4 0
3 years ago
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