Marie has an electromagnet that she wants to use to help her lift some metal. Before she installs the electromagnet into the lifting machine, she decides to investigate the magnetic field to increase as much as possible the magnet’s strength and range. She identifies an independent variable that she will vary and a dependent variable, the magnet’s strength and the range. Fill out the investigation planning worksheet below to show how Marie plans her experiment:

2b2t

explanation:

2b2t

the answer is 0.8m.

by: nicholas

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

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