Answer:
0.229 M/s is molecular nitrogen reacting
Explanation:

Rate of the reaction :
![R=-\frac{1}{1}\frac{d[N_2]}{dt}=-\frac{1}{3}\frac{d[H_2]}{dt}=\frac{1}{2}\frac{d[NH_3]}{dt}](https://tex.z-dn.net/?f=R%3D-%5Cfrac%7B1%7D%7B1%7D%5Cfrac%7Bd%5BN_2%5D%7D%7Bdt%7D%3D-%5Cfrac%7B1%7D%7B3%7D%5Cfrac%7Bd%5BH_2%5D%7D%7Bdt%7D%3D%5Cfrac%7B1%7D%7B2%7D%5Cfrac%7Bd%5BNH_3%5D%7D%7Bdt%7D)
Rate at which hydrogen gas is reaction :
![\frac{d[H_2]}{dt}=0.0687 M/s](https://tex.z-dn.net/?f=%5Cfrac%7Bd%5BH_2%5D%7D%7Bdt%7D%3D0.0687%20M%2Fs)
Rate at which hydrogen gas is reaction :
![\frac{d[N_2]}{dt}=?](https://tex.z-dn.net/?f=%5Cfrac%7Bd%5BN_2%5D%7D%7Bdt%7D%3D%3F)
![-\frac{1}{1}\frac{d[N_2]}{dt}=-\frac{1}{3}\frac{d[H_2]}{dt}](https://tex.z-dn.net/?f=-%5Cfrac%7B1%7D%7B1%7D%5Cfrac%7Bd%5BN_2%5D%7D%7Bdt%7D%3D-%5Cfrac%7B1%7D%7B3%7D%5Cfrac%7Bd%5BH_2%5D%7D%7Bdt%7D)
![\frac{d[N_2]}{dt}=\frac{1}{3}\times 0.0687 M/s](https://tex.z-dn.net/?f=%5Cfrac%7Bd%5BN_2%5D%7D%7Bdt%7D%3D%5Cfrac%7B1%7D%7B3%7D%5Ctimes%200.0687%20M%2Fs)

0.229 M/s is molecular nitrogen reacting
The total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne is 3.
Answer:
26.74g
Explanation:
The equation of the reaction is;
SIO₂ + 3C --> SiC +2CO
From the balanced equation, the relationship between SiC and C is;
3 mol of C produces 1 mol of SiC
Converting mol to mass using; Mass = moles * Molar mass
Mass of SiC = 1 mol * 40.11 g/mol = 40.11g
This means;
3 mol of C produces 40.11g of SiC
2 mol of C produces xg of SiC
3 = 40.11
2 = x
x = 2 * 40.11 / 3 = 26.74g
Answer: average speed
Explanation: describes speed of motion when speed is changing.