How many moles are there in 2.37 x 10^23 molecules of H2O2?

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.