As temperature increases, the particles will gain kinetic energy causing it to move more rapidly and randomly. However, this causes the gas to expand as the particles will have more energy to roam freely. Hence as temperature increases, Volume increases.
This is based on Charles' Law stating that the volume of a gas is directly proportional to its absolute temperature.
Answer:
0.2 moles, assuming weight of dried salt
Explanation:
In order to determine the number of moles, we need to be aware of the mass of the substance in question.
Assuming the mass of the dehydrated 
is 50g.
No. of moles = mass of substance/ molar mass of the substance.
= 
= 0.2 moles moles.
Answer:
1.3 × 10⁴ mL
Explanation:
A Pb-contaminated water sample contains 0.0012 %Pb by mass, that is, there are 0.0012 g of Pb in 100 g of solution. The mass of the sample that contains 150 mg (0.150 g) of Pb is:
0.150 g Pb × (100 g sample/0.0012 g Pb) = 1.25 × 10⁴ g sample
The density of the sample is 1.0 g/mL. The volume of the sample is:
1.25 × 10⁴ g × (1 mL/1.0 g) = 1.3 × 10⁴ mL
Answer is: sulfate anion.
Balanced chemical reaction: Ca²⁺(aq) + SO₄²⁻(aq) → CaSO₄(s) .
Calcium sulfate (CaSO₄) has very low solubility in water (Ksp for calcium sulfate is 2.36·10⁻⁴).
Calcium cation (Ca²⁺) will form a precipitate with other anions also:
1) with oxalate anion (C₂O₄²⁻) will form CaC₂O₄(s), calcium oxalate.
2) with phosphate anion (PO₄³⁻) will form Ca₃(PO₄)₂(s), calcium phosphate.
3) with hydroxide anion (OH⁻) will form Ca(OH)₂(s), calcium hydroxide.
4) with carbonate (CO₃²⁻) will form CaCO₃(s), calcium carbonate.
The answer to you question is 3
