Answer:
Explanation:
The density of a substance can be found by using the formula
From the question we have
volume = final volume of water - initial volume of water
volume = 45 - 30 = 15 ml
We have
We have the final answer as
Hope this helps you
Is balanced
A
It has 140 neutrons because Mass number= No of protons + no of neutrons
T3/T4 I think, sorry if it is wrong. :/