For the reaction, 2a + b → 3c, rate of disappearance of a is 0.3 m/s in a certain time interval. what is the average rate of appearance of c and what is the average rate of the reaction in that time interval?

a) rate of appearance of c = 0.45 m/s
rate of the reaction = 0.6 m/s
b) rate of appearance of c = 0.2 m/s
rate of the reaction = 0.6 m/s
c) rate of appearance of c = 0.2 m/s
rate of the reaction = 0.15 m/s
d) rate of appearance of c = 0.45 m/s
rate of the reaction = 0.3 m/s
e) rate of appearance of c = 0.45 m/s
rate of the reaction = 0.15 m/s

E) rate of appearance of C = 0.45 M/s

rate of the reaction = 0.15 M/s

Explanation:

2A + B → 3C

Writing rate law for the reaction:

Rate of reaction = - = - = → equation 1

Given that the rate of disappearance of A is 0.3 M/s

⇒ - = 0.3 M/s

⇒Rate of reaction = - = ×0.3 M/s

⇒Rate of reaction = 0.15 M/s

From equation 1, = - = ×0.3 M/s

⇒ = 0.45 M/s

or the rate of appearance of C = 0.45 M/s

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles