the executive office of the president
Answer:
120b
Explanation:
im really good at math i think
This is an oxidation reduction reaction
oxidation happens when the species gives out electrons.Oxidation state of the element Cu increases from 0 to +2
Cu ---> Cu²⁺ +2e --1)
Reduction happens when the species gains electrons.
Oxidation state of N reduces from +5 to +2
4H⁺ + NO₃⁻ + 3e ---> NO + 2H₂O --2)
To balance the reactions, number of electrons need to be balanced.
Multiply 1st reaction by 3
Multiply 2nd reaction by 2
3Cu ---> 3Cu²⁺ + 6e
8H⁺ + 2NO₃⁻ + 6e ---> 2NO + 4H₂O
add the 2 equations
3Cu + 8H⁺ + 2NO₃⁻ --> 3Cu²⁺ + 2NO + 4H₂O
add 6NO₃⁻ ions to each side
3Cu + 8HNO₃ --> 3Cu(NO₃)₂ + 2NO + 4H₂O
the balanced redox reaction equation is as follows;
3Cu(s) + 8HNO₃(aq) --> 3Cu(NO₃)₂ (aq)+ 2NO(g) + 4H₂O(l)
Answer:
Explanation:
To find the density of nitrogen gas at STP which is standard temperature and pressure, certain parameters must be known.
The mass of the gas must be given or its volume.
Density of a substance is the mass per unit area;
Volume of gas at STP = number of moles x 22.4
Using the volume obtained here,
Density =
Then we can find the density.
The mass is very important.
Answer:
The answer to your question is Rb₃N
Explanation:
Data
Lithium Nitride = Li₃N
Rubidium Nitride = ?
Process
1.- Both Lithium and Rubidium are placed in group lA of the periodic table, which means that their valence number if + 1.
2.- Nitrogen is placed in group VA, which means that its oxidation number is -3.
3.- Write the formula and interchange the oxidation numbers.
Rb⁺¹ N⁻³
Rb₃N₁
But number one is not necessary to write it.
Rb₃N