You need 5.0 grams of LiOH for a reaction, but all you have on hand is a 2.75 M aqueous LiOH solution. What volume of the solution should you add to the reaction mixture to supply the 5.0 g of LiOH

75.9mL of 2.75M LiOH solution

Explanation:

Molarity is an unit of concentration defined as the ratio between moles and liters. And the molar mass of LiOH is 23.95g/mol. With this information, it is possible to know the volume of solution you should add to supply 5.0g, thus:

5.0g LiOH × (1mol / 23,95g) × (1L / 2.75mol) × (1000mL / 1L) = 75.9mL of 2.75M LiOH solution

I hope it helps!

first one is the correct answer

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72