Answer:
0.448 g
Explanation:
The first step is to obtain the number of moles of KMnO4 reacted from the data given at end point. We now apply this result together with data from the balanced reaction equation in a simple proportion to obtain the amount of sodium oxalate that reacted. We then calculate the molar mass of the sodium oxalate and multiply this molar mass by number of moles of oxalate reacted in order to obtain the mass of oxalate reacted. See image attached for details.
Answer:
P = 13.5 atm
Explanation:
Given that
No. of moles, n = 20 moles
Volume of nitrogen gas = 36.2 L
Temperature = 25°C = 298 K
We need to find the pressure of the gas. Using the ideal gas equation
PV = nRT
Where
R is gas constant,
So,
so, the pressure of the gas is equal to 13.5 atm.
Answer: 3.35x10²³atoms H2
Explanation: solution attached:
Convert mass of Al to moles
Do the mole to mole ratio between Al and H2
Convert moles of H2 to atoms using Avogadro's number.
