I believe the correct answer from the choices listed above is the third option. The <span>oxidation number of Nitrogen in HNO2 would be +3. It is calculated as follows:
1 + x + (-2)(2) = 0
x = +3
Hope this answers the question. Have a nice day.</span>
Explanation :
The balanced chemical reaction will be,
By the stiochiometry, 3 moles of solid copper(II)oxide react with 2 moles of ammonia gas to give 3 moles of copper metal, 1 mole of nitrogen gas and 3 moles of liquid water.
The states of matter of each elements and compound is,
Copper(II)oxide is in solid state
Ammonia is in gaseous state
Copper metal is in solid state
Nitrogen is in gaseous state
Water is in liquid state
Single displacement (I’m assuming that’s the same as single replacement)
To find heat, you need the following formula
heat= specific heat x mass x ΔT
specific heat (for water)= 4.184--> according to the table
mass= 100 grams
ΔT= 75 -10= 65 °C
let's plug the values.
specific heat= 4.184 x 100 x 65= 27200 joules or 27.2 Kilojoules
Explanation:
it's because when CO₂ reacts with H₂O then it forms H₂CO₃ (carbonic acid), which is a acid that's why a compound formed by CO₂ and H₂O is sour.
Reaction:
CO₂ + H₂O → H₂CO₃
