1. Tiffany's class did an experiment to prepare a compound by reacting copper and sulfur. The following is the account of Tiffany's experiment. I weighed some coppet powder and added excess sulfur powder to it. After mixing, a yellow-brown mixture was formed. I heated the mixture in a test tube. It glowed red-hot. A blue-grey solid was formed. I removed the excess sulfur with xylene and obtained the blue-grey solid left behind. (a) Tiffany has left out the details of how she removed the excess sulfur. Describe the procedure she should have used. (Hint: Only sulfur is soluble in xylene.)

Talc (french chalk) is the ingredient

What do you mean by that? like the contents? the thc level?

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.