Which of the following equations is balanced
C + 02 = 2CO
2C +202 =2CO
2C + O2 = 2CO
2C + 2O2= C2O2

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?

Given sno2 + 2h2 - sn + 2h20 tin oxide reacts with hydrogen to produce tin and water. how many moles of sno2 are needed to produce 500.0 grams of sn?

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles