2Al + 3H2SO, Al2(SO.)3 + 3H2 1. Calculate the number of moles of Al(SO.), produced when 4.25 moles of
aluminum is reacted with sulfuric acid.
2. Find the nunider of moles of Al(SO.), that will be produced from the
reaction of 75.00 grams of aluminum.
3. How many grams of hydrogen gas will be produced from reacting 2.50
moles of Al? (*Remember that hydrogen is diatomic.)
4. If 43.55 g of hydrogen are needed, how many grams of aluminum will be
required?

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

2b2t

explanation:

2b2t

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este