Suppose you want to do an experiment to hear how three different objects would sound when you dropping them the same distance. you drop a pebble a rock, and a grain of sand. what are the variables of your experiment

A chemical change : a. occurs when powdered lemonade is stirred into water. b. occurs when water is vaporized. c. occurs when paper is shredded. d. occurs when salt is dissolved in water. e. occurs when methane gas is burned.

6Li + N2 2Li3N If 12 mol of lithium were reacted with excess nitrogen gas, how many moles of lithium nitride would be produced? 4.0 mol 6.0 mol 12 mol 36 mol

How many valence-shell electrons are there in no? express your answer as an integer?

If I have 0.75 moles of gas at a temperature of 105 K and a pressure of 3.75 atmospheres, what is the volume of the gas

If an atom has 16 protons, 14 neutrons, and 17 electrons, what is the atom's electrical charge?

Diseases that are inherited are caused by

Why do many metal ions produce acidic solutions when dissolved in water?

Which property of potential energy distinguishes it from kinetic energy? a. mass b. position c. force d. work and power

A sample of pure copper has a mass of 5 grams calculate its volume

Which statement best explains why carbon is present in so many kinds of molecules? Question 1 options: It is abundant on earth, so it is readily available to bond with other elements. It does not form strong bonds, so it breaks apart.