Calculate the volume of 0.20 mol dm sodium hydroxide solution that would be needed to neutralise 10.0 cm of hydrochloric acid with a concentration of 0.50 mol dm​

Using the periodic table, complete the table to describe each atom. type in your answers

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures