Answer:
The correct answer is pH relates to relative acid-base ion balance in a solution.
Explanation:
This is because pH is a measure of the concentration of hydrogen ions in a solution. Also the higher the number of Hydrogen ions in a solution, the higher the acidicity and the lower the pH.
ΔH = Enthalpy of formation of products - <span>Enthalpy of formation of rectants.</span>
ΔH = [ΔHf (CO2)(s) + ΔHf (H2)(g) ] − [ ΔHf (CO)(g) + ΔHf (H2O)(g) ]
ΔHf (CO2) = <span>−393.509 kJ/mol
</span>ΔHf (H2) = 0 kJ/mol
ΔHf (CO) = −110.525 kJ/mol
ΔHf (H2O) = −241.818 kJ/mol
ΔH = [−393.509 + 0 ] − [ −110.525 + (−241.818) ] =
−41.166 kJ/mol , answer.
Balanced chemical reaction:
2Na₃PO₄(aq) + 3CaCl₂(aq) → 6NaCl(aq) + Ca₃(PO₄)₂(s).
Ionic reaction:
6Na⁺(aq) + 2PO₄³⁻(aq) + 3Ca²⁺(aq) + 6Cl⁻(aq) → 6Na⁺(aq) + 6Cl⁻(aq) + Ca₃(PO₄)₂(s).
Net ionic reaction: 2PO₄³⁻(aq) + 3Ca²⁺(aq) → Ca₃(PO₄)₂(s).
<span>(aq) means that
substances are dissociated on cations and anions in water.
</span>(s) means solid.
Atomic mass of Potassium = Mass of 1 atom of Potassium = 39.1 amu
Then
Mass of 6.02 x 1023 atoms of potassium = 39.1 x 6.02 x 1023 amu
=
We already know that
1 mole = 6.02 x 1023 atoms
Also
Number of mole = mass in grams/ atomic mass
Then
Mass in gram = Number of mole x atomic mass
= (39.1 x 6.02 x 1023)/(6.02 x 1023)
= 39.1 g
The correct option among all the options that are given in the question is the third option or option "B".
Answer:
This is what the picture will look like
Explanation: