Answer:
<u>Question</u><u> </u><u>1</u><u>:</u>
<em>Answer</em><em>:</em><em> </em>M: (17 - 35) & (17 - 37), N:(8 - 18) (8 - 16) & (8 - 17)
• Isotopes are atoms of the same element with same atomic number but different mass numbers.
<u>Question</u><u> </u><u>2</u><u>:</u>
<em>Answer</em><em>:</em><em> </em>Element M has high nuclear charge than element N
• Nuclear charge depends on atomic number or proton number.
The balanced equation is:
Then proceed with the following equations.
The answer is
.
Answer:
its letter d ..................................
Answer:
I'm pretty sure its a combination reaction!!
Explanation:
they generally form between metals and non metals like that^
First, we write out a balanced equation.
HA <--> H(+) + A(-)
Next, we create an ICE table
HA <--> H+ + A-
[]i 0.40M 0M 0M
Δ[] -x +x +x
[]f 0.40-x x x
Next, we write out the Ka expression.
Ka = [H+][A-]/[HA]
Ka = x*x/(0.40-x)
However, because Ka is less than 10^-3, we can assume the amount of dissociation is negligible. Thus,
Assume 0.40-x ≈ 0.40
Therefore, 1.2x10^-6 = x^2/0.40
Then we solve for the [H+] concentration, or x
x=6.93x10^-4
Next, to find pH we do
pH = -log[H+]
pH = -log[6.93x10^-4]
pH = 3.2