Chemistry Questions and Answers

Chemistry

The chemical formula of water is H2O. One molecule of water has 2 atoms of hydrogen and one atom of oxygen. 1 mole of water requires 1 mole of hydrogen (H2) and 0.5 moles of oxygen (O2). The molar...

Latest answer posted March 4, 2012 11:24 am UTC

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Chemistry

A 4 M solution of lithium bromide has to be made with 100 grams of lithium bromide. A solution with a concentration of 1 M has one mole of the solute dissolved in one liter of the solution. The...

Latest answer posted April 2, 2011 9:16 pm UTC

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Chemistry

C6H6 is the chemical formula of benzene. It is a molecule comsisting of 6 carbon atoms and 6 hydogen atoms. When benzene undergoes combustion in air, the carbon and hydrogen atoms combine with the...

Latest answer posted September 10, 2012 2:04 am UTC

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Chemistry

The concentration of a solution can be expressed in many way, one of them is molarity or the molar concentration. If a solution has a molarity of one, it has one mole of the solute in every liter...

Latest answer posted April 1, 2011 11:53 am UTC

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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....

Latest answer posted April 2, 2011 9:05 pm UTC

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Chemistry

The chemical equation when aluminum reacts with oxygen is: 4Al + 3O2 --> 2Al2O3 3 moles of O2 react with 4 moles of Al to give 2 moles of Al2O3. The ratio of the number of moles of aluminum to...

Latest answer posted June 21, 2012 12:56 pm UTC

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Chemistry

You cannot directly convert grams to atoms. First you must covert your grams to moles, then you can take the moles and covert to atoms. If you take your 878 grams of fluorine and then look at the...

Latest answer posted February 7, 2009 1:47 pm UTC

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Chemistry

The volume of a given amount of gas is related to the temperature and pressure by the Ideal Gas Law by P*V=n*R*T or V = k*T/P The volume is directly proportional to the temperature and inversely...

Latest answer posted November 9, 2011 10:57 am UTC

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Chemistry

A titration reaction, in simplest terms, is one in which a substance is added to another substance, ideally drop by drop, till the end point of the reaction is reached. This end point is determined...

Latest answer posted March 27, 2016 12:46 pm UTC

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Chemistry

A chemical compound is a chemical substance that is made of two or more atoms of different elements that share a chemical bond. A chemical formula represents the ratio of atoms per element that...

Latest answer posted November 2, 2015 10:58 am UTC

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Chemistry

Aluminum reacts with `H_2SO_4` to form `Al_2(SO_4)_3` . The equation of the chemical reaction is: `2Al + 3H_2SO_4 -> Al_2(SO_4)_3 + 3H_2 ` 2 moles of aluminum react with 3 moles of hydrogen...

Latest answer posted June 21, 2012 4:50 pm UTC

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Chemistry

I assume you are referring to tricalcium phosphate. The molar mass of this compound is 310.18 g/mole. 660 grams of tricalcium phosphate has 660/310.18 = 2.127 moles of tricalcium phosphate. We need...

Latest answer posted April 1, 2011 12:27 pm UTC

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Chemistry

You are only allowed to ask one question at a time so I edited down your question accordingly. We need to convert the following to a balanced chemical equation: copper (2) carbonate plus...

Latest answer posted January 13, 2013 3:17 am UTC

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Chemistry

The reaction between carbon dioxide and water to form hydrogen carbonate is an example of a bond-reorganization reaction. As one of the reactants is water it is also referred to as a hydration...

Latest answer posted September 23, 2012 3:35 am UTC

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Chemistry

Covalent compounds are formed between nonmetals. Examples of nonmetals H , O , N , C , S , P , F , Cl , Br , I. Examples of covalent compounds: - CH2O, H2O etc., Ionic compound is formed between a...

Latest answer posted September 5, 2012 5:41 am UTC

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Chemistry

A 3.00 M solution of sodium chloride (NaCl) has 3 moles of NaCl in every liter of the solution. To find the mass/volume of the 3.00M solution, we must determine the mass of a single mole of NaCl...

Latest answer posted December 1, 2012 5:27 am UTC

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Chemistry

The chemical name for table sugar is sucrose (C12H22O11). To classify this compound first we have to know what happens when this compound is in the solution. If it is an acid, it will release...

Latest answer posted October 19, 2012 11:37 am UTC

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Chemistry

The concentration of a solution can be written in terms of the number of moles of the solute that are present in one liter of the solution. This is called the molar concentration or the molarity....

Latest answer posted April 3, 2011 3:37 pm UTC

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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....

Latest answer posted April 26, 2012 7:27 pm UTC

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Chemistry

To solve this problem look at the equation of the chemical reaction that takes place between the antacid which is sodium bicarbonate and citric acid: 3 NaHCO3 + H3C6H5O7 --> 3 CO2 + 3 H2O +...

Latest answer posted May 18, 2011 5:28 pm UTC

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Chemistry

The reaction between sadium chloride and the hydrochloric acid can be illustrated by, NaOH + HCl --> NaCl + H2O so here 1 mole of NaOH reacts with 1 mole of HCl. Hence it is required to convert...

Latest answer posted May 2, 2012 10:39 am UTC

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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...

Latest answer posted August 15, 2012 5:38 am UTC

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Chemistry

The reaction of copper (II) sulfate CuSO4 and ammonium hydroxide NH4OH will yield Copper (II) hydroxide Cu(OH)2 and ammonium sulfate (NH4)2SO4. The chemical equation for this reaction would be...

Latest answer posted October 30, 2012 5:18 pm UTC

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Chemistry

Chemists use many different tools and technologies to perform their work. The study of chemicals requires very accurate equipment that can measure precise weights, analyze reactions and color...

Latest answer posted July 23, 2012 9:45 pm UTC

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Chemistry

The limiting reactant in a chemical equation is the reactant that is completely consumed when the chemical reaction takes place. As a result the reactant determines for how long the reaction takes...

Latest answer posted June 21, 2012 1:13 pm UTC

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Chemistry

We should be careful when defining "properties" - chemical properties are probably the ones that an instructor would be taking into consideration. By contrast, elements of the same group have very...

Latest answer posted July 22, 2015 2:17 am UTC

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Chemistry

Copper Sulfate can dissolve in water because water is a polar solvent. A polar solvent is one where the molecules that make up the solvent have a charge that is unequally distributed in the...

Latest answer posted June 17, 2011 2:57 am UTC

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Chemistry

The first ionization energy of potassium is 419 kJ/mol while calcium's is 376 kJ/mol. Note that the first ionization energy is the amount of energy needed to remove an outer electron from the...

Latest answer posted April 10, 2012 1:53 pm UTC

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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...

Latest answer posted December 26, 2009 12:32 am UTC

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Chemistry

Chromatography is a very common lab technique that is used to separate different components of a complex mixture. It takes the advantage of differential solubility of different components of a...

Latest answer posted September 9, 2012 7:24 pm UTC

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Chemistry

Methanamide (HCONH2) is also called formamide. The standard Lewis structure notation involves a single bond between the hydrogen and the carbon, a double bond between the carbon and the oxygen, a...

Latest answer posted November 18, 2012 5:00 pm UTC

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Chemistry

We can calculate the concentration of H+ ions in a 0.1 M solution of acetic acid by using the pKa or ionization constant which for any compound is the negative logarithm of the equilibrium...

Latest answer posted August 31, 2011 1:26 am UTC

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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...

Latest answer posted November 22, 2010 4:30 am UTC

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Chemistry

Krypton has an atomic number 36, so it has 36 electrons. Bromine with an atomic number of 35 acquires one electron to attain 36 electrons. This makes it isoelectronic with krypton. The anion of...

Latest answer posted February 8, 2011 4:43 am UTC

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Chemistry

Finding the limiting reactant Given NO2(g) + O2(g) → NO(g) + O3(g) 5.20 g of nitrogen dioxide 3.90 g of oxygen. First step balance the given chemical reaction NO2(g) + O2(g) → 2NO(g) + O3(g) This...

Latest answer posted July 3, 2012 10:45 pm UTC

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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...

Latest answer posted January 19, 2010 10:18 am UTC

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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 --->...

Latest answer posted May 8, 2011 1:26 pm UTC

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Chemistry

You can set up stoichiemetry using the following equation: (15.6 g MgF2) x (38g F / 62g MgF2) x (6.022x10^23 / 19gF) = 3.03 x 10^23 molecules of F or 1.52 x 10^23 molecules of F2

Latest answer posted December 31, 2011 1:44 am UTC

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Chemistry

There are many ways of expressing the concentration of a solution. One of them is to write it in terms of the number of moles of the solute that are present in one liter of the solution. This is...

Latest answer posted April 3, 2011 3:56 pm UTC

1 educator answer

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...

Latest answer posted March 17, 2016 1:34 am UTC

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Chemistry

Molarity is the concentration of a dissolved compound expressed in terms of mole/liter. A solution with a molarity of one has one mole of the dissolved compound in every liter of the solution. A...

Latest answer posted March 31, 2011 12:18 am UTC

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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...

Latest answer posted October 19, 2012 1:30 am UTC

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Chemistry

Separating a mixture of salt and sugar is actually quite easy. Athough sugar is soluble in any type of alcohol, salt on the other hand is not. If you want to separate the two, first mix both salt...

Latest answer posted January 22, 2014 6:09 pm UTC

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Chemistry

In ionic bonds one atom is positively charged (the atom that gives its electrons), and the other atom is negatively charged (the atom that receives the electrons); therefore, it is the opposite...

Latest answer posted June 2, 2013 8:16 pm UTC

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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...

Latest answer posted October 22, 2008 5:54 pm UTC

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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...

Latest answer posted September 5, 2012 5:07 am UTC

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Chemistry

In a blast furnace, which is generally used to obtain pure iron from its ore, the following reactions take place. C + O2 --> CO2 + Heat C + CO2 --> 2CO Fe2O3 + 3CO --> 2Fe + 3CO2 Fe2O3 +...

Latest answer posted January 5, 2011 10:05 pm UTC

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Chemistry

Nitrogen oxides, including NO and NO2, are produced as a result of combustion in a car engine. Pure combustion takes hydrocarbons (gasoline) and pure oxygen (O2) and produces CO2 and H2O. But...

Latest answer posted November 18, 2012 5:23 pm UTC

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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...

Latest answer posted March 18, 2011 4:21 pm UTC

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Chemistry

If we are looking at a galvanic cell, then it be a spontaneous process so we need to determine which is the oxidation reaction and which one is the reduction reaction. The half-reaction with the...

Latest answer posted April 26, 2012 6:18 pm UTC

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