Question

NEED HELP ASAP!!

Which of the following is a single replacement reaction? (4 points)
Ca(OH)2 + H2SO4 → CaSO4 + 2H2O
CH4 + 2O2 → CO2 + 2H2O
H2O+ CO2 → H2CO3
Fe + 3NaBr → FeBr3 + 3Na

Answer 1

Answer: Fe + 3NaBr → FeBr3 + 3Na

Explanation: You take the Br from 2NaBr and it makes FeBr3, so it makes a single replacement.

Answer 2

Answer: Fe + 3NaBr → FeBr3 + 3Na

Explanation: You take the Br from 2NaBr and it makes FeBr3, so it makes a single replacement.