Question

Which describes heat in the unbalanced chemical equation CO + O2 → CO2 + energy? (1 point)
(A) absorbed in the reaction

(B) acts as a catalyst

(C) produced by the reaction

(D) is one of the reactants

Answer 1

Thast the combustion of carbon monoxide, heat is released, so it produced by the reaction (enthalpy is negative number)

Answer 2

Thank you, can you help me with a couple more questions?

Answer 3

yeah, sure

Answer 4

1. Which is not a properly balanced chemical equation?
(A) 2H2 + O2 → 2H2O
(B) N2 + 3H2 → 2NH3
(C) 2S + 4O2 → 2SO4
(D) 2Na + Cl2 → 2NaCl
2. What precipitate forms when silver nitrate and potassium chromate solutions are mixed?
(A) K2CrO4(s)
(B) KNO3(s)
(C) AgNO3(s)
(D) Ag2CrO4(s)
3.The complete ionic equation alway has _____.
(A) the precipitate as the only product of the reaction
(B) every ion or substance involved in the reaction
(C) the aqueous compound as the only product
(D) only the spectator ions from the reaction
4. For a reaction between two aqueous compounds, potassium sulfate and lead(II) nitrate, which compound is an expected product?
(A) K2Pb(s)
(B) SO4(NO3)2(s)
(C) PbSO4(s)
(D) KNO3(s)
5. Which substance does not indicate that a double-replacement reaction has occurred?
(A) water
(B) precipitate
(C) gas
(D) aqueous salt

Hope its not too much. These question have been troubling more for the longest. Thanks in advance!

Answer 5

someone please help!