• Chemistry
Free radicals are atoms or groups of atoms that can be very dangerous to the human body. Free radicals occur when various types of atoms interact with oxygen and thereby come to have an odd number...

• Chemistry
The reaction of the combustion of carbon is: C + O2 --> CO2 dH = -393.5 kJ As dH is negative the reaction is exothermic and burning one mole of carbon releases 393.5 kJ of heat. The molar...

• Chemistry
The mass of a sodium atom is 22.98977 g/mole. The mass of a sodium ion Na which has one electron less than a sodium atom is lesser by 9.109*10^-31 kg. For all practical purposes the mass of the two...

• Chemistry
The sodium atom and the sodium ion are obviously very closely related but have some very different properties. Both have 11 protons in their nuclei but the sodium atom has 11 electrons while the...

• Chemistry
Cobalt Carbonate (CoCO3) and Zinc Carbonate (ZnCO3) both decomposes to produce carbon dioxide (CO2) in the presence of heat. The chemical equation for this reaction can be written as: CoCO3 CoCO_3...

• Chemistry
There are too many compounds that contain hydrogen to be listed out here. Hydrogen is present in hundreds of inorganic compounds which include all acids, bases, hydrides, hydrates, etc. and almost...

• Chemistry
The compounds for which the chemical formula is required are lead nitrate, silver bromide, barium chloride, potassium hydride and potassium iodide. In the chemical formula of compounds, elements...

• Chemistry
The pH value tells us about the acidity or basicity of a solution. Acids have a pH values less than 7 while bases have a pH greater than 7. Pure water has a neutral pH of 7. Tap water is likely...

• Chemistry
Water molecules are attracted to each other because of their molecular structure (H2O). The attraction forms hydrogen bonds. Water molecules will stay stuck together until something weakens the...

• Chemistry
Magnesium (Mg) atomic number 12 on the Periodic Table, is an alkaline earth metal element and is the seventh most abundant element in the Earth's crust. It is moderately hard and silvery-white in...

• Chemistry
It is not clear exactly what level you are looking for, as you ask about college, but your profile shows high school. The level of complexity and rigor is different depending on the level at which...

• Chemistry
Molecules are composed of more than one atom. The number of atoms that make up a molecule can range from two for the simplest molecule to even in the thousands. The atoms that make up a molecule...

• Chemistry
All atoms have 3 constituent particles: protons, neutrons and electrons. (The exception here is the isotope of hydrogen with mass number 1 which does not have neutrons.) The protons and neutrons...

• Chemistry
Cr2O7^(2-) + H^(+) + H2SO3 -> Cr^(3+) + H2O + HSO4^(-) Looking at the equation, the first thing that you can balance is the number of Cr. By putting 2 beside Cr^(3+)` you can balance Cr. By...

• Chemistry
If you do a graph of pH vs. mL of NaOH, you will see that the pH gradually rises with each addition of the NaOH until all of the acetic acid in the sample is neutralized. Then a small addition of...

• Chemistry
There are intermolecular forces of attraction that act between between molecules but these are not fibers. Molecules are formed from atoms as the formation of the molecule results in a decrease in...

• Chemistry
Hydrogen gas undergoes a chemical reaction in which it is oxidized by oxygen; which itself is reduced by the hydrogen. In plain language, the reaction is that of hydrogen being burned and for which...