An apple has a mass of 130 grams. Which of the following statements are true? A. The apple takes up 130 grams of space.
B. The gravitational pull on the apple is equal to 130 grams.
C. The apple contains 130 grams of matter.
D. The apple will always sink in water.

1. they vary with a higher number because boiling is way hotter than melting

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

answerleaving cheese out to get moldy;