An unknown polyatomic ion (XY) combines with Br to form the following compound (XY)Br3. What is the charge on XY? A.+3
B.-3
C.+1
D.-1
I need help please

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

Type the correct answer in the box. spell all words correctly. what is the correct term for living the most sustainable life you can within your current circumstances? when your are being as sustainable as you can within your current lifestyle, you are said to be sustainability.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?