Answer:
2.24dm³
Explanation:
Given parameters:
Mass of He = 40g
Unknown:
Volume of Helium = ?
Solution:
To solve this problem, we convert the given mass to number of moles.
Number of moles = 
molar mass of He = 4g/mol
Number of moles = 
= 0.1mole
So;
1 mole of gas at rtp occupies a volume of 22.4dm³
0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³
1. sundering
2. talc
3 luster
If you never stopped you could walk 17918.2 miles
Answer:
this isn't correct answer but the equation is correct by using this methid you can got your answer .
Explanation:
Given - Mass number of atom = 23
Atomic number of atom = 11
As, no. of electrons in an atom is equal to an atomic number of the element.
So, number of electrons = 11
Secondly , number of protons are equal to number of electrons.
so, number of protons = 11
And number of neutrons = mass number - atomic number = 23−11 = 12
so, number of neutrons = 12
So , the atom contains 11 protons, 11 electrons, 12 neutrons.
Answer:
80 degrees
Explanation:
if you think about it 80 degrees is hotter than 20 degrees if I'm not right tell me in the comments please
