Answer is: -267 kJ/mol.
Chemical reaction: Ag₂O(s) + H₂S(g) → Ag₂S(s) + H₂O<span>(l).
</span>ΔHrxn = ∑ΔH(products of reaction) - ∑ΔH(reactants).
ΔHrxn = (ΔHf(Ag₂S) + ΔHf(H₂O)) - (ΔHf(H₂S) + ΔHf(Ag₂O)).
ΔHrxn = (-32,6 kJ/mol - 286 kJ/mol) - (-20,6 kJ/mol - 31 kJ/mol).
ΔHrxn = -318,6 kJ/mol + 51,6 kJ/mol.
ΔHrxn = -267 kJ/mol.
What best explains the type of energy present in the vibrating atoms of a substance?
The answer is: <u>It is thermal energy, which is a type of kinetic energy. </u>
Answer:
37.1g of Ca
Explanation:
Hello,
Molecular formula for calcium chloride = CaCl
Molar mass = 40 + 35.5 = 75.5g/mol
Assuming there's one mole of CaCl
1 mole = mass / molar mass
Mass = 1 × 75.5
Mass = 75.5g
75.5g of CaCl contains 40g of Calcium
70g of CaCl will contain x g of Calcium
X = (70 × 40) / 75.5
X = 37.086g
Therefore, 70g of CaCl contains approximately 37.1g of Ca
Answer:
Cretaceous Period
Explanation:
Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years.
Answer:
A
Antoine-Laurent Lavoisier
:D
