Amedical drug with a chemical formula of c4 (hno3)6 is used to treat mild to moderate pain and to reduce fever . how many atoms are represented in its chemical formula?

a) 13
b)23
c) 34
d)54

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

How is the atomic number of a nucleus changed by alpha decay

Chemistry worksheet - i am not sure what they are asking for exactly?