Answer:
Moles = Mass / Mr
Moles = Concentration x Volume
Explanation:
Moles can be worked out in several ways depending on the information you are given. Some of the equations containing moles are:
Moles = Mass / Mr
Moles = Concentration x Volume
Answer: i think it is 144.16
Explanation:
Answer:
0.886 J/g.°C
Explanation:
Step 1: Calculate the heat absorbed by the water
We will use the following expression
Q = c × m × ΔT
where,
- c: specific heat capacity
- ΔT: change in the temperature
Q(water) = c(water) × m(water) × ΔT(water)
Q(water) = 4.184 J/g.°C × 50.0 g × (34.4 °C - 25.36 °C) = 1.89 × 10³ J
According to the law of conservation of energy, the sum of the energy lost by the solid and the energy absorbed by the water is zero.
Q(water) + Q(solid) = 0
Q(solid) = -Q(water) = -1.89 × 10³ J
Step 2: Calculate the specific heat capacity of the solid
We will use the following expression.
Q(solid) = c(solid) × m(solid) × ΔT(solid)
c(solid) = Q(solid) / m(solid) × ΔT(solid)
c(solid) = (-1.89 × 10³ J) / 32.53 g × (34.4 °C - 100. °C) = 0.886 J/g.°C
Neutrons released during a fission reaction trigger other fission reactions.
Answer:
a. the density of radon = 0.0908g/m3
b. radon gas concentration will be greater on top of the building than than basement.
Explanation:
the solution to this question can be gotten from ideal gas law.
the ideal gas law is given by :
PV = nRT
where
P = atmospheric pressure in atm = 1 atm
V = volume in m3
n = number of moles
R = the gas constant.
T = temperature in kelvin = 298K
the gas constant R is given as 8.3145J.mol-1.K-1 or 8.2057m3.atm/mol.K.
n= mass of gas divided by molecular mass of gas = m/MM
PV = nRT
V/n = RT/P
V/m =RT/MM.P
density = m/V = (MM*P)/(RT)
the molecular mass of Radon is a constant which is 222g/mol
the density of radon = (222*1)/(8.2057 * 298)
= 0.0908g/m3
b. radon gas concentration will be greater on top of the building than than basement. radon concentration increases as height increases. also radon concentration increases greatly in the afternoon and evening and decreases in the morning. this means temperature affect the concentration.