How can mass and energy behave in an open system

How many moles of aluminum do 4.60x10^24 aluminum represent? Express your answer using three significant figures.

A sample of gas has a pressure of 47.5 mm in a 125-ml flask. the sample is transferred to a new flask, where it has a pressure of 66.2 mm at the same temperature. what is the volume of the new flask

This unit discusses in detail the role of catalysts to lower the activation energy of reactions. The term catalyst appears in nonscientific discussions to refer to something that provokes or speeds significant change or action.

What postulate of the kinetic molecular theory best explains why gases have high fluidity? Because collisions between gas particles are elastic, there is no loss of energy as particles flow past each other.

Convert 72g of O2 to moles

What product (s) forms at the cathode in the electrolysis of an aqueous solution of k2so4?

What element is used as a shield to protect people from radioactive substances?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays

A farmer uses water to irrigate his potato crops. Which roles of water does this examplify

How was helium first discovered?