2.How many neutrons does an atom of tungsten (W) have when its mass number is 185?
1 answer:
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Answer:
V = 0.0007678398L
Explanation:
Given parameters:
Number of moles of gas = 3.43moles
Temperature = 273k
pressure = 100kPa = 100000Pa
Unknown:
Volume of gas = ?
Solution
The gas is at standard temperature and pressure, this implies we can use the ideal gas equation to solve for the unknown.
Mathematically, the law is expressed as:
PV = nRT
The unknown here is the Volume, V. We know the other parameters.
P = pressure on the gas
n = number of moles
R = gas constant=0.082
T = temperature
now, we have to make V the subject of the expression:
V =
V =
V = 0.0007678398L
Answer:
0.06375 moles
Explanation:
Molarity is defined as moles of a solute per volume of solution.
-Given the molarity is 0.750m and the volume is 85ml
#Apply the molarity formula to solve for moles:
Hence, 0.06375 moles of sulfuric acid are needed.