ALL BUT ONE situation is an expected effect of the recent Deepwater Horizon oil spill in the Gulf of Mexico. That is: A)
Tar balls buried beneath beach sand influence crustacean movements,
habitats, and breeding patterns.
B)
The rapid extinction of top-level consumers in the Gulf food webs, such as
sharks, dolphins, and sea turtles.
C)
Scrubbing efforts of surrounding wetlands interfere with an areas natural
ability to regenerate plant growth.
D)
Deep sea oil plumes serve as a food source bacteria, and in turn, the
lower oxygen levels produce deep sea dead zones.

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