What is the number of electrons shared between the
atoms in an i2 molecule?
a) 7 b) 2 c) 8 d) 4

answer:

b)2

explanation:

iodine forms a diatomic non-polar covalent molecule. the graphic on the top left shows that iodine has 7 electrons in the outer shell. since 8 electrons are needed for an octet, two iodine atoms equally share 2 electrons.

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.

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