112 L/ 16 L = 7 mol O2
7 mol O2 x 2 mol Fe2O3/ 3 mol O2 = 4.67 mol Fe2O3
lmk if its right
Answer:
π = MRT
= × RT
= ×RT
MM = mxRxT / πxL
MM = 8.00g ×0.0821×298/ 2.86×0.200L
= 342.2 g/mol
Explanation:
the molecular weight of the sugar can be determined by using the osmotic pressure formula.the formula has to be worked on in order to get the molar mass of the sugar.the name of the sugar is called sucrose.
Answer:- 9.4 minutes.
Solution:- Radioactive decay obeys first order reaction kinetics and the equation used to solve this type of problems is:
where, k is decay constant and t is the time. is the initial amount of the radioactive substance and N is the remaining amount.
Since the value of decay constant is not given, so we need to calculate it first from given half life by using the formula:
where stands for half life.
Given half life is 3.0 minutes.
So,
Let's plug in the values in the first order reaction equation and solve it for t.
It could also be written as:
k = 9.4 min
So, the radioactive substance would take 9.4 minutes to decay from 40.0 grams to 4.5 grams.