Answer:
BaCrO₄ will precipitate first.
Explanation:
For a generic salt (AB) that is soluble in some solvent, the solubility product constant (Kps) is:
AB(s) ⇄ A⁺ + B⁻
Kps = [A⁺]*[B⁻]
So, as greater is Kps, as higher is the solubility, and more difficult will be to form a precipitated (the solid form of the salt).
Kps of BaCrO₄ < Kps of BaC₂O₄, so BaCrO₄ will precipitate first.
3. The answer is B. 11. This is because there are the same amount of electrons and protons in an atom, and since there are 11 protons, there are 11 electrons.
5. The formula H2O means that there are 2 hydrogen atoms (because the 2 is after the H), and 1 oxygen atom, so the answer is C.
Hope this helps!
Answer: will be released when 0.25 moles of glucose in a can of soda is metabolized
Explanation:
Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.
Given :
Amount of heat released on combustion 1 mole of glucose = 2.8 MJ =
Thus we can say:
1 mole of glucose on combustion releases =
Thus 0.25 moles of glucose on combustion releases =
Thus will be released when 0.25 moles of glucose in a can of soda is metabolized