Question 10 of 10 At what point is the half-life of a radioactive isotope reached?
O A. When all the parent nuclei in a sample have become daughter
nuclei
OB. When half the daughter nuclei in a sample have become parent
nuclei
O C. When all the daughter nuclei in a sample have become parent
nuclei
O D. When half the parent nuclei in a sample have become daughter
nuclei
SUBMIT

answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2