• Chemistry
Sulfites are chemical compounds that have the sulfite ion which is SO3-- with a valence of 2-. Iron can form chemicals in which it is capable of existing in many oxidation states ranging from -2 to...

• Chemistry
If the products of a reaction act as a catalyst for the reaction, it is referred to as autocatalysis. Reactions that show autocatalysis start slowly and as more of the reactants get converted to...

• Chemistry
Since we are looking at the amounts of reactants and products, we first need to write a balanced chemical reaction. For an acid-base reaction, we will see salt and water. HCl + NaOH --> NaCl +...

• Chemistry
2Al_((s))+3H_2SO_(4(aq)) rarr Al_2(SO_4)_(3(aq))+3H_(2(g)) Al_2(SO_4)_3 is formed when we add H_2SO_4 acid to Al solid. Mole ratio Al:Al_2(SO_4)_3 = 2:1 Molar mass of Al = 27g/mol...

• Chemistry
Phosphorus and fluorine together form phosphorus trifluoride, or PF3. PF3 has trigonal bipyramidal molecular geometry and can be polar or nonpolar depending on the binding locations of the flourine...

• Chemistry
DDT which has a molecular formula of C14H9Cl5 has 14 atoms of carbon, 9 atoms of hydrogen and 5 atoms of chlorine. The atomic mass of carbon, hydrogen and chlorine is 12, 1 and 35 respectively. The...

• Chemistry
Mercury thermometers make use of the following properties of liquids: Liquids have no set shape. Because mercury has no set shape, it can conform to the shape of the glass tube that the...

• Chemistry
The acid dissociation constant is a value defined for every acid HA and denoted by Ka = [H+][A-]/[HA] The acid dissociation constant of oxalic acid is 5.60×10^-2 and 5.42×10^-5. There are two...

• Chemistry
Bleach is Sodium Hypochlorite (NaOCl). It is made industrially by the Hooker Process where Chlorine Gas is reacted with Sodium Hydroxide in a cold electrolytic cell following the equation: Cl2...

• Chemistry
The oxidation number refers to the charge on the central atom of a compound when the ligands attached to it are removed and so are the atoms that associated with the ligand. For the sulfate anion...

• Chemistry
Silicon Carbide (industrially known as Carborundum) is extremely rare in nature, but has been produced in quantity since the 1890's. Its hardness has found many uses in industry; diamond jewelry...

• Chemistry
Citric acid has 37.51% carbon, 4.2% hydrogen and 58.29% oxygen by mass. The molar mass of carbon is 12 g/mole. The molar mas of hydrogen in 1 g/mole and the molar mass of oxygen is 16 g/mole....

• Chemistry
First we will need to the complete chemical reaction involving sulfuric acid and alluminium. 2Al + 3H2SO4 -----> Al2(SO4)3 + 3H2 From the reaction 2 moles of Al react with 3 moles of H2SO4 [...

• Chemistry
Condensation and vaporization are, in essence, opposite phenomena. When a liquid (say water) gets hot enough, it vaporizes and becomes a gas. By contrast, condensation is the process whereby a gas...

• Chemistry
To solve this problem we need to have an idea about molarity. The concentration can be expressed as: Molarity = moles/ L 1dm^3 = 1L According to the ration given, there are 15 g or N atoms per 100...

• Chemistry
An 8.00 g sample of iron was extracted from a blast furnace and analyzed as follows. First the iron in the sample was completely dissolved in an acid and the Fe3+ ions precipitated as ferric(III)...

• Chemistry
The empirical formula of the compound that we have to determine is CH. The molecular mass of the compound is given by 78.110 amu. The atomic mass unit or amu is defined as 1/12 the mass of the...

• Chemistry
The equation of the chemical reaction between potassium (K) and oxygen (O2) is: 4K + O2 --> 2K2O From the equation it is seen that 4 moles of potassium react with with one mole of oxygen gas...

• Chemistry
When iron filings are heated with sulfur, the following chemical reaction occurs: Fe + S --> FeS The reaction occurring between iron and sulfur is an exothermic reaction and only requires to be...

• Chemistry
All of the ammonium salts decompose, or break down upon heating at a molecular level. Another property of ammonium salts is that they have solubility in water. They dissolve in water and can be...

• Chemistry
Every chemical reaction is either endothermic (heat absorbing) or exothermic (heat producing.) Capital H in chemistry (not to be confused with the element Hydrogen!!) will be found with reaction...

• Chemistry
The reaction that takes place when NaOH is added to acetic acid is: NaOH + HAc --> NaAc + H2O 100 mL of 0.1 M NaOH contains 0.01 moles of NaOH. 150 mL of 0.2 M HAc contains 0.03 M of HAc. After...

• Chemistry
The two terms mean the same thing--the temperature at which the state of a substance changes from a solid to a liquid, or vice versa. When it goes from solid to liquid, we refer to "melting point";...

• Chemistry
A compound of nitrogen and oxygen has 4.2 g of nitrogen and 12 g of oxygen. As the molar mass of nitrogen is 14 and that of oxygen is 16, the ratio of the number of moles of nitrogen and oxygen in...

• Chemistry
A mole is just like saying you have a certain amount of something. When you say you have "ten" of something, it could be cats or atoms or pencils or ducks. You could say you have "ten thousand"...

• Chemistry
Any cake could be considered a compound, which is defined as something composed of two or more separate elements. Baking is a science, requiring precise measurements of the ingredients listed in a...

• Chemistry
A major advantage of methanol is that methane, its raw material form, can be mined and is already produced by the U.S. cattle farming industry. Methane, a greenhouse gas, is dangerous in the...

• Chemistry
Hello! Aqueous solutions is a kind of solution where in the solvent is water. It is commonly labelled as (aq) after the compound. For example HCl (aq). This also means that the solutes is...

• Chemistry
There are three functional groups. First one - In the left Primary amine H2N- Second one- In the middle Ether - -CH2-O-CH2- Third one - In the right Ester - -CH2-COO-CH3 But according to the...

• Chemistry
Carbon monoxide reacts with oxygen gas to produce carbon dioxide according to the following equation: 2 CO + O_2 -> 2 CO_2 At room temperature this reaction must be catalyzed. Carbon monoxide...

• Chemistry
Metallic copper reacts with a solution of silver nitrate to form a solution of copper(II) nitrate and the silver is precipitated. The equation for this reaction can be written as Cu + AgNO3 --->...

• Chemistry
The concentration of a solution can be expressed in terms of its molarity (M). A solution with a molarity of one has a concentration of one mole of the solute in every one liter of the solution....

• Chemistry
Electrolysis is a process where electricity is passed through a solution and this results in the molecules of the solvent and the solute getting separated into ions. Once ions are formed, the same...

• Chemistry
The number of molecules of magnesium fluoride in 15.6 g of MgF2 has to be found. The molecular mass of MgF2 is 62.3018. 15.6 g of MgF2 is equivalent to 15.6/62.3018 mole of MgF2. One mole of a gas...

• Chemistry
This question is an application of ratios using the molecular mass of thyroxine and that of iodine. The chemical formula of thyroxine is given as C15H11NO4I4. The molecular mass of thyroxine is...

• Chemistry
The 200 mL solution of NaOH with a molarity of M/4 has a density of 1.08 g/cm^3. The molarity of the solution is required after 5 g of NaOH is added to it. To determine the resultant molarity we do...

• Chemistry
Palladium has an atomic number of 46 and has 46 electrons orbiting the nucleus. The electronic configuration of Palladium is 1s2, 2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10. The noble gas which is...

• Chemistry
Phosphine (PH3) has a central phosphorus atom combined with 3 hydrogen atoms. It is a trigonal pyramidal shaped molecule. Phosphorus has an electron configuration of [Ne]3s2 3p3, the outer most...

• Chemistry
For parts A & B, see http://www.enotes.com/chemistry/q-and-a/consider-galvanic-cell-based-following-half-333659 Please note that when you post a question, it should only include *one* question....

• Chemistry
In this question, when barium hydroxide and hydrochloric acid react, we get water and barium chloride, with the reaction following the chemical equation: Ba(OH)2 + 2HCl --> BaCl2 + 2H2O....

• Chemistry
Technically speaking, alpha and beta decay are both types of nuclear fission. Fission is the breaking down of an atom's nucleus into smaller parts. Specifically, alpha decay is the breaking down...

• Chemistry
The atomic number of an element is the number of protons that are present in its nucleus. The exact atomic mass of an element is derived from the weighted average of the mass of its different...

• Chemistry
Atomic theory states that all substances are comprised of atoms. Something that has all the same atoms is an element; something with a mixture of different atoms is a compound. Each of these...

• Chemistry
K2CrO4 + CuSO4 = CuCrO4 + K2SO4 The colour is dark brown.

• Chemistry
These kinds of chemicals (often called CFCs) were a very hot topic in environmentalism about twenty years ago or so. They are no longer discussed much because we have moved on to things like...

• Chemistry
The chemical equation that has to be balanced is: K4Fe(CN)6 + H2SO4 + H2O = K2SO4 + FeSO4 + (NH4)2SO4 + CO Go about doing this in the following manner: Consider the first compound K4Fe(CN)6, K is...

• Chemistry
Balancing chemical equations can be a little tricky because the number of molecules of all the compounds that are reacting as well as the products have to be in the form of whole numbers. We cannot...

• Chemistry
First, it's nail polish remover, which is acetone, that does the trick.Very simply styrofoam is made up of long strands of polymers with air trapped inside. Acetone is a solvent, which breaks down...