Answer:
moles of H2O = 4.5 mol
Explanation:
balanced equation:
∴ mass SnO2 = 339 g
∴ molar mass SnO2 = 150.71 g/mol
⇒ moles SnO2 = (339 g)(mol/150.71 g) = 2.25 mol SnO2
⇒ moles H2O = (2.25 mol SnO2)(2 mol H2O/mol SnO2)
⇒ moles H2O = 4.5 mol H2O
m - the mass that remains unchanged, m₀ - the inital mass, t - the time of decay, t1⁄2 - the half-life
The half-life is (1) 8 days.
I can’t see the image, can you name some of the energy resources under this comment?
Answer:
Sample Response: If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.
Explanation:
its the sample response
Answer:
0.08moles
Explanation:
Given parameters:
Volume of gas = 0.5L
Pressure of gas = 400kPa
Temperature of gas = 300K
Unknown:
Number of moles of N₂ = ?
Solution:
Applying the ideal gas law which is a combination of the three gas law: Boyle's law, Charles's law and Avogadro's law will solve this problem.
The ideal gas law is stated as;
PV = nRT
P is the pressure of the gas
V is the volume of the gas
n is the number of moles
R is the gas constant
T is the temperature of the gas
We need to convert kPa of the pressure to atm which is a more comfortable unit to work with.
400kPa will be = 3.95atm
Input the variables in the equation;
3.95 x 0.5 = n x 0.082 x 300
n = 0.08moles