Answer:
3.4g of Al
Explanation:
you would need to start with 3.4 g of Al
According to the stoichiometry the CO2 formed is 1/2 the moles of H2O. So take the moles of CO2 as 5moles.
n=m/M
Where :
n = mole
m = mass
M = molar mass
Molar mass of CO2 = 44gmol^-1
Therefore mass = 5mol× 44gmol^-1= 220g
Answer:
B
Explanation:
Beta decay takes away a proton
43 +1 = 44
So in order to take one away, the # of protons has to 44
Option B is the only one with a 44 on the bottom, therefore making it the answer.
Sister chromatids are two identical copies of a single chromosome that are connected by a centromere. They occur as a result of a chromosome that duplicated during the S phase of the cell cycle.