Explanation:
From the question it can be infered that initially only parent atoms were present in the rock and no daughter atom. So, initially there was only uranium atom and no lead atom. So, in total there were 500+1500= 2000 uranium atom. And no lead tom was there.
Answer:
aluminium is more reactive than carbon. carbon is used to displace less reactive metals from their compounds. this happens since the carbon reacts with the other substance(s) in the compound, and the less reactive metal does not.
Explanation:
It is known that the relation between pH and is as follows.
pH =
and,
Hence, first we will calculate the value of as follows.
=
= 4.75
Now, we will calculate the value of pH as follows.
pH =
=
= 4.75 + (-0.677)
= 4.07
Therefore, we can conclude that the pH of given solution is 4.07.
Answer:
1)electrons
2)protons, neutrons
Explanation:
please mark me as brainlest
Hey there!
pH = - log [ H⁺ ] = 3.52
[ H⁺ ] = 10^-pH
[ H⁺] = 10^ ( -3.52 )
[H⁺] = 3.02*10⁻⁴ M
[HA] =0.175 M
Therefore:
Ka = [ H⁺]* [A⁻] / [ HA]
Ka = (3.02*10⁻⁴)² / 0.175
Ka = 9.1204*10⁻⁸ / 0.175
Ka = 5.2*10⁻⁷
Hope that helps!