A current if 2.50amps flows for 20 seconds. How many moles of electrons flows at this time?

What is the temperature of one mole of helium gas at stp?

All of the following are homogeneous mixtures except a) sugar dissolved in water. b) orange juice. c) coffee with cream. d) household vinegar. e) apple juice

Which of the following is the best explanation why some reactions appear to stop before all the reactants are converted to products? the reaction goes to completion. the reaction reaches equilibrium and the products stop being formed. the reversible reaction occurs at the same rate. the limiting reactant prevents the forward reaction occurring.