How many moles are in 25.0 grams of KMnO4? (3 points) a 0.124 mol KMnO4 b How many moles of each element are in one mole of Sr(HCO3)2? (3 points) a 1 mole of strontium, 1 mole of hydrogen, 1 mole of carbon, 5 moles of O b 1 mole of strontium, 2 moles of hydrogen, 2 moles of carbon, 6 moles of O c 2 moles of strontium, 2 moles of hydrogen, 2 moles of carbon, 5 moles of O d 2 moles of strontium, 2 moles of hydrogen, 2 moles of carbon, 6 moles of O0.158 mol KMnO4 c 0.199 mol KMnO4 d 0.316 mol KMnO4

a:

by the combination of an unlimited number of elements

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

idk i'm not smart

explanation:

t h