3. What determines the mass number of an element?

The mumhor of nrotons

What substance is combination of different atoms

Sodium explosive metal chlorine is ominous gas you would expect a compound made of sodium and chlorine to be

1. If 22.5 L of nitrogen at 1.25 atm are compressed to 2.10 atm at constant temperature. What is the new volume?

In a robinson annulation, an α,-unsaturated carbonyl compound reacts with a carbonyl compound to afford a (new) cyclic α,-unsaturated ketone by a michael-aldol-dehydration sequence.

The cochlea is a liquid-filled cavity in the inner ear. t or f?

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.