Which best describes how magnesium (Mg) and oxygen (O) bond? a
They form an ionic bond by exchanging two electrons.

b
They form an ionic bond by exchanging three electrons.

c
They form a covalent bond by sharing one electron.

d
They form a covalent bond by sharing four electrons.

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Can someone me with 1 to 4 plz. fast

How many moles of sulfuric acid (h2so4) are needed to react completely with 6.8 moles of lithium hydroxide (lioh)? 2lioh + h2so4 → li2so4 + 2h2o a. 3.4 mol h2so4b. 6.8 mol h2so4 c. 10.2 mol h2so4 d. 13.6 mol h2so4