Are atoms mostly empty space

How many molecules of n2 are in a 300.0 ml container at 780 mmhg and 135°c?

Describe two factors that can contribute to resistance of weathering of rocks

Although voltaic and electrolytic cells have some differences, some things that they have in common are the processes that happen at the anode and cathode.

How to determine if a molecule is soluble in water?

A. D = 24 g/mL V = 1.2 L = m = ?

Suppose that you measure a pen to be 10.5 cm long. Convert this to meters.

How are amounts of hydrogen and oxygen gas made from the electrolytic decomposition of water related to the chemical formula of water?

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.