Describe how the accessory organs of the mouth - tongue, teeth, and saliva - aid in both MECHANICAL and CHEMICAL digestion.

Look Below

Explanation:

In terms of mechanical digestion, the teeth provide grinding and tearing motion to break down the food into physically smaller pieces the tongue assists the teeth by moving itself and food around the mouth. In terms of chemical digestion, salivary glands in the back of the tongue and the lower mouth release saliva as a method of adding liquid to the food to help the process of swallowing. In addition, saliva contains the enzyme amylase which helps process some starches into more simple sugars.

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