Answer:
The catalyzed reaction will take 1,41 s
Explanation:
The rate constant for a reaction is:
Assuming frequency factor is the same for both reactions (with and without catalyst) it is possible to obtain:
Replacing:
That means the reaction occurs 5,64x10¹⁰ faster than the uncatalyzed reaction, that is 2537 years / 5,64x10¹⁰ = 4,50x10⁻⁸ years. In seconds:
4,50x10⁻⁸ years××× =<em> 1,41 s</em>
I hope it helps!
Answer:
D. Element
Explanation:
Fe is an element. It isn't more than one element chemically combined (compound), it isn't a charged particle (ion), and it isn't the smallest possible unit of multiple atoms combined together (molecule).
Answer:
6750 J
Explanation:
The specific heat capacity of iron is 450 J/kg/K
Quantity of heat = mcθ; where m is the mass and c is the specific heat capacity and θ is the temperature change.
Therefore;
m = 3 kg, c = 450 J/kg/K and θ = 5°C
Quantity of heat = 3 × 450 × 5
<u>= 6150 Joules</u>
First one I believe is 5.
2nd is given already
3rd is 1
4th is 2