To solve this problem, we have to apply mole-concept to this and we would need the molar mass of AlCl3. 2g of AlCl3 contains 9.034*10^21 molecules.
<h3>Number of Molecules in 2g of AlCl3</h3>
The molar mass of AlCl3 is given as 133.34g/mol
Data;
- mass = 2g
- molar mass = 133.34g/mol
Using the mole concept, we can equate the molar mass to the number of molecules present in the entity.

If we equate this

From the calculations above, 2g of AlCl3 contains 9.034*10^21 molecules.
Learn more on mole concept here;
brainly.com/question/21150359
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Wah..I need to ask my bro to answer this.. Brb
<span>Let x be
additional food item the homeroom B should collect to have greater item per student than
homeroom A.</span>
(22 +24 + x) /
16 > (30 + 42 + 21) /24
(22 +24 + x)
> 3.875 (16)
X > 16
<span>So they should
collect more than 16 food item to have a greater item per student</span>
4 because you take 2²= 2 times 2 = 4