Use this website. It helps alot
https://www.webqc.org/balance.php
Equal volumes of equal concentrations of strong acid and strong base are mixed. Because the volumes and molarities are equal, the number of mole NaOH and HCl are equal.
From reaction
HCl + NaOH ---> NaCl +H2O
we can see that if number of moles HCl and NaOH are equal, they will react completely, and no acid or base is going to be in solution anymore.
So, pH=7.
Answer: argon (Ar)
Ar, Z=18 => 1s2 2s2 2p6 3s2 3p6
The 3 level shell has 8 electrons. The element with one more electron, need to start a new shell to arrange for the last electron.
Argon is a noble gas. Its group in the periodic table is 18. All the noble gases have the last shell full, which conferes them a high stability and low reactivity.
<h3>Chemical reaction formula</h3>
Be2+ + S2- -> BeS
<h3>Product formula : BeS</h3>
Hey Secretlystupid........ANYWAYS, the percent composition of sodium phosphate is 42.1.
-Steel jelly