My little brother asked me what 2+2 is and I keep telling him it’s 4 but he won’t listen to me and he keeps on asking me what it is and he won’t stop asking no matter how many times I tell him, so can someone say what the answer is so I can show him? I also even looked it up to show him but he says it’s wrong so maybe he will stop after he sees this.

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Provide a stepwise curved arrow mechanism that fully explains the outcome of the reaction shown below. oh нао* heat он

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions