Determine the percent composition of the following: 1) NaBr

2) CaC2O4

3) Al2(SO4)3

4) LiNO3

5) CH3COOH

6) Ba(NO3)2

BTW all the numbers are SUBSCRIPTS
PLEASE HELP SOMEONE

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Explain how light energy is turned into chemical energy? ! due tomorrow!