Eon Era Period Epoch AgePhanerozoic Cenozoic Paleogene Oligocene Chattian Rupelian
<span>First, divide the mass of N2O by it's molar mass of 46 g/mol to determine the number of moles of N2O, then multiply that number by two since there are two moles of N in each mole of the compound N2O. This results in a final answer of 9.78X10^-3 moles of N in 0.225g of N2O.</span>
Answer:
The two conditions that can limit the usefulness of the kinetic-molecular theory in describing gas behavior are "high pressure" and "low temperatures". At low temperatures or high pressures, real gases deviate significantly from ideal gas behavior.
Explanation:
Answer: 0.53g
Explanation:
No of moles= volume ×molarity/1000
We have the volume and the molarity
Volume=4L
Molarity=1.7M
No of moles = 4×1.7/1000
No of moles= 0.0068moles
Remember also that
No of moles= mass given/molar mass
Molar mass of Al(OH)3
Al= 27
O=16
H=1
Molar mass = Al+(O+H)3
Molar mass= 27+(16+1)3
Molar mass= 27+(17)3
Molar mass = 27+51
Molar mass= 78g/mol
To get the mass
Mass given = no of moles × molar mass
Mass= 0.0068×78
Mass= 0.53g
Answer:
Water
Explanation:
To solve this problem, we need to solve for the number of molecules of these compounds;
given:
Mass of water = 1.25g
Mass of C₂H₅OH = 0.89g
We first solve for the number of moles of these compounds;
Number of moles = 
Molar mass of H₂O = (2x1) + 16 = 18g/mole
Molar mass of C₂H₅OH = (12 x 2) + (1 x 5) + 16 + 1 = 46g/mole
Number of moles of H₂O = 
= 0.07moles
Number of moles of C₂H₅OH = 
= 0.02moles
We see that number of moles of water is more than that of ethanol. Therefore it has more molecules because;
1 mole of substance = 6.02 x 10²³
0.02moles of ethanol = 1.2 x 10²²molecules of ethanol
0.07moles of water = 4.2 x 10²² molecules of water
