Testbank, Question 5.063 Zinc metal reacts with nitric acid solution to produce zinc nitrate (in solution), ammonium nitrate (in solution), and water. The species being reduced in this reaction is
O Zn(s)
O Zn2+ (aq)
O Zn(NO3)2(aq)
O HNO3(aq)
O NH *(aq)​

a patient chooses to not take a beneficial medical treatment.

explanation:

c (diamond),

sio2 (quartz)

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