Classify the following as an Element(E), Compound(Com), Heterogeneous Mixture(HM), Solution(Sol), Suspension (Sus) or Colloid(Col).
1. Copper
2. Steel
3. Pizza
4. Chocolate Chip Ice Cream 5.Com Sodium chloride 6. Coke
7.Silver
8.
Gold ring
9. Salt dissolved in water
10.Orange juice
11. Bricks
12. HM Honey
14.
13.com Calcium
Earth
15. Table salt
16. E_Magnesium
17.
Vegetable soup
18. Corn starch in water
19. Hm Sand on the beach 20. Diamond
21. Pencil lead
22.] + M Glass
23. Vinegar
24. Air
Helium
26. Cheerios
27. Paper
28. HM Uranium
29. The Moon
30. Clouds
25. €

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

rosa was looking for patterns to predict the products of chemical reactions. she recorded three similar decomposition reactions in the table.she should record 2licl + 3o2.

in the last row of the table. it is the thermal decomposition of chlorate lithium, hence, she should record these products as: lithium chloride ( 2licl ) and oxygen ( 3o2 )   2 > 2 licl + 3o2.