Answer:
Excess reagent is the ZnS. After the reaction is complete, 1.67 moles of sulfide remain.
Explanation:
This is the reaction to work with:
2ZnS + 3O₂ → 2ZnO + 2SO₂
Limiting reagent is the oxygen. We confirm it by a rule of three
2 moles of sulfide can react to 3 moles of O₂
Therefore 3 moles of ZnS will react to (3 . 3) / 2 = 4.5 moles (we need 4.5 moles of O₂ and we only have 2 moles, that's why the O₂ is the limiting)
Excess reagent is the zinc (II) sulfide
3 moles of oxygen react to 2 moles of ZnS
2 moles of O₂ will react to (2 . 2) / 3 = 1.33 moles of ZnS (it is ok, be cause we have 3 moles, and we need only 1.33)
After the reaction is complete ( 3 - 1.33) = 1.67 moles of sulfide remain.
Answer:
Milk, which when not subjected to temperature, is a homogeneous mixture. This is because- the various components of pure milk, which are the nutrients present in it, don't form separate layers in it and hence can’t be separated by any physical method.
But when milk is subjected to external factors, such as temperature, the milk fat no more remains dissolved in the milk but instead can be seen as a layer on the top-either as a white solid layer which is called as the cream or as yellow droplets. The two layers can be separated by physical means and hence making milk a heterogeneous mixture.
So the conclusion is that milk is a homogeneous mixture by default.
Explanation:
Answer:
The answer to your question is letter B.
Explanation:
Process
1.- Calculate the molecular mass of Ferric oxide
Fe = 56g x 2 = 112 g
O = 16 x 3 = 48 g
Mass = 112 + 48 = 160 g
2.- Calculate the mass of 0.7891 moles of Ferric oxide
160 g of Fe₂O₃ ------------- 1 mol
x ------------- 0.7891 mol
x = (160 x 0.7891) / 1
x = 126.2 g
