Answer:
The correct answer to a) is sulfuric acid
b) 1/6 moles of aluminum sulfate is produced
Explanation:
To solve this we need to write out the balaned chemical equation as follows
Al(OH)3(s) + 3 H2SO4(aq) -----> Al2 (SO4)3(aq) + 6 H2O(l)
Here we see that one mole of aluminium hydroxide reacts with three moles of sulphuric acid to form one mole of aluminium sulphate and six ,oles of water
Hence the limiting reactant in this question is the sulphuric acid as 0.5 moles of alumininium hydroxide requires 1.5 moles of sulphuric acid to completely use up the aluminium hydroxide present
Dividing the number of moles of the reactants present by the amount of moles of sulphuric acid required we have
Hence 3 mole of sulphric acid combines with 1 mole of Aluminium hydroxide
0.5 mole of sulfuric acid combines with 0.5÷3 or 1/6 mole of Aluminium hydroxide
Hence the correct answer is sulfuric acid
b) to solve this, since three moles of sulfuric acid produces one mole of aluminium sulfate then 0.5 moles of sulfuric acid produces 0.5/3 or 0.166 mole of aluminum sulfate
hence 1/6 moles of aluminum sulfate is produced
Answer: A stream carves its path through a watershed, eroding nutrients from the soil and rock, or taking them from plants.
Explanation: Because, those nutrients flow through different branches of the food web. They may stay in that watershed for a long time or they may leave.
Collisions result in transfer of energy from molecules of higher kinetic energy to molecules of lower kinetic energy.
Warm water molecules slow down while cold water molecules speed up.
Explanation:
During the mixing of cold water and a hot water source, there is transfer of energy and at a point of equilibrium, both will be at the same temperature.
This is the point of thermal equilibrium.
- Here, the particles of the hot water have a greater amount of kinetic energy.
- They begin to collide with those of the cold water and transfer their energy to them.
- Due to the loss of energy, their molecules begins to slow down and the cold water molecules speeds up.
- With time, they will both have the same speed.
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Answer:
The answer is 33 .
Explanation:
The mass number of an atom is the atomic mass which consists of proton and neutron. This atom has 16 protons and 17 neutrons so it has a mass of 33 :
proton number + neutron number = nucleon number / atomic mass
16 + 17 = 33