21. A sound wave traveling through a certain freshwater lake has a frequency of 249.2 Hz and a wavelength of 5.25 m. What is the speed of a sound wave in this water? (Round your answer to
three significant figures.)
(1 Point)
0.021 m/s
O 47.5 m/s
254.45 m/s
1308.3 m/s
O 1480 m/s

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never