What mass of solute (molar mass=124 g/mol) is present in 250 mL of a 1.2M solution? Give your answer in grams to 1 decimal place.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

d.) circle motion requires a force to give it a centripetal acceleration.

1 a

2 d

3 a

4 c

explanation:

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