Answer: 40 + 2x14 + 6x16 = 164g/mole
54.3g x [1mole / 164g] = 0.331moles
355mL x 1L / 1000mL = 0.355L
molarity = 0.331moles / 0.355L =
00
Explanation:
Concentration = 2.14 âś• 10-2 m
For [Br-], there are 2 ions so 2 x 2.14 x 10^-2 =4.28 x 10^-2
Ksp = [Pb][Br]^2 = 2.14 âś• 10-2 x (4.28 x 10^-2 )^2 = 39.20 x 10^-6
Ksp = 3.92 x 10^-5
Answer:
Mercury has the lowest freezing point for metals, but helium takes the winner for all substances.
Explanation:
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