9. Which of the following could represent a molecular formula for CH2O? C6H₁2O6
Ο Ο Ο
C4H₃04
de
10
We
TRO
C4H₂O4
18
Ar
04
O
C₂H₂O₂
Kr
aro
54
Ya

Afamily is one another name for a group on the table of elements.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?