What is the total pressure of a gas mixture containing partial pressures of 0.23 atm 0.42 atm and 0.89 atm?

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond