Aspirin is a medicine for use by adults.

an aspirin tablet contains 300mg of acetylsalicylic acid.

calculate the number of moles of acetylsalicylic acid in one aspirin tablet.

give your answer in standard form to three significant figures.

relative formula mass (mr) of aspirin = 180

An example of technology is the a. addition of a side group to an organic molecule during synthesis. b. use of a new antibiotic to fight an infection. c. measurement of iron concentration in a water sample. d. study of atomic fusion reactions

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

What is a difference between a mixture of elements and a mixture of compounds