Answer:
Cd(HCO₃)₂ (s) ⇒ CdCO₃ (s) + H₂O (l) + CO₂ (g)
Explanation:
Cadmium hydrogen carbonate = Cd(HCO₃)₂ (solid)
Cadmium carbonate = CdCO₃ (solid)
Water = H₂O (liquid)
Carbon dioxide = CO₂ (gas)
Skeleton equation: Cd(HCO₃)₂ (s) ⇒ CdCO₃ (s) + H₂O (l) + CO₂ (g)
This is already balanced.
Answer:
709415.584 g
Explanation:
This is a heat capacity problem. We use the formula below to calculate.
Q=mcΔT
where Q is the quantity of heat
m is the mass of substance
ΔT is the change in temperature of substance( T2-T1).
Q= 9.5MJ = 9.5*10^(6}J
C.P = 30.8J/(K.mol)
temperature of sodium increases by 10°C which means our final temperature in kelvin T2 will be 510K
initial temperature T1= 500K
m= Q/[c (T2-T1)]
m= 9.5*10^(6}/ {30.8(510-500)]
m= 30844.156 mol of Na
Converting to grams we multiply by the molar mass of Na.
molar mass of Na = 23
mass of Na= 30844.156 *23
=709415.584 g
Answer: The vapor pressure of water at 10°C will be less as compared with its vapor pressure at 50°C.
Explanation:
Vapor pressure of a liquid is defined as the pressure exerted by the vapors in equilibrium with the liquid/solution at a particular temperature.
As Kinetic energy is dependent on the absolute temperature of the gas.
where R = gas constant
T = temperature
On increase in temperature, the kinetic energy of the molecules increase and thus more liquid molecules can escape to form vapours and thus will exert more vapor pressure.
Thus the vapor pressure of water at 10°C will be less as compared with its vapor pressure at 50°C.
Answer:
1 mol
Explanation:
2H2 + O2 ---> 2H2O
4g H2 (1 mol H2/ 2g H2)(1 mol O2/ 2 mol H2)= 1mol O2
A. How religion and philosophy different
All the other choices (b-d) can be explained by science while a can be explain by history I think
