Answer:
Just click on the answer, if it is an external link DO NOT CLICK IT. it may contain dangerous stuff including h*cked stuff.
Explanation:
1kg is 1,000 grams plus .5 is 1.5 kg
Answer: a) The concentration after 8.8min is 0.17 M
b) Time taken for the concentration of cyclopropane to decrease from 0.25M to 0.15M is 687 seconds.
Explanation:
Expression for rate law for first order kinetics is given by:

where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) concentration after 8.8 min:



b) for concentration to decrease from 0.25M to 0.15M


49.8 g should be the balance read.
Explanation:
Adding the mass of the evaporation dish 44.8 g with the mass of the copper 5 g you obtain 49.8 g.
On the balance you put first the evaporation dish (or a watch glass) over which you add copper until you reach 49.8 g.
Learn more about:
balance
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Answer:
because the brian is like a computer because that both use electrical signals to send messages the brain uses chemicals to transmit information and the computer uses electricity.
Hope that was helpful