3 years ago

How many neutrons does element X have if its atomic number is 31 and its mass number is 84?

1 answer:

Alex3 years ago

8 0

Atomic number is protons + electrons
Mass number is protons + neutrons
So to calculate the number of neutrons, you do
atomic number - atomic mass
31 - 84 = - 53

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The decomposition of acetaldehyde is a second order reaction with a rate constant of 4.71 10−8 L/mol/s. What is the instantaneou

pochemuha

Answer: Rate of decomposition of acetaldehyde in a solution is $1.45\times 10^{-14}mol/Ls$

Explanation:

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For a reaction : $A\rightarrow products$