To find the number of moles from a mass given, simply look to the formula n (moles) = m (mass, g) / MM (molar mass).
Mass was given, 36.04
Molar mass is the total atomic mass of all the atoms present. Water is H20, so that means 2 hydrogen and 1 oxygen. The atomic mass of hydrogen is 1 and atomic mass of oxygen is 16. Therefore MM= 1 + 1 + 16= 18.
Plug that value in and the full equation is
n = 36.04/18
n = 2.002 moles
= 2 moles
9.1 basic since > 7
1.2 VERY acidic << 7
5.7 acidic < 7
Mass number = protons + neutrons
protons = electrons
so 35 electrons = 35 protons
So 35 protons + 45 neutrons =
80
The element is Bromine with the symbol: Br
Answer:
https://www.webassign.net/question_assets/wertzcams3/appendix.pdf
<h3><u>Answer;</u></h3>
Partial pressure of Ar = 92.934 kPa
<h3><u>Explanation;</u></h3>
Partial pressure of a gas = Mole fraction × Total pressure
Mole fraction = Number of moles of a gas /Total moles of gas
Therefore;
Mole fraction of Ar = 0.211 mol/ (0.211 + 0.150)
= 0.5845
Total pressure = 159 kPa
Hence;
Partial pressure of Ar = 0.5845 × 159 kPa
<u> = 92.934 kPa</u>