Chemistry Questions and Answers

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 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

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

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

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

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

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

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

1 educator answer

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 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 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

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

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

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

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

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 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

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

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

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

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

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

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

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

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 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

An Na+ ion is a sodium atom that has lost one electron as that makes the number of electrons in the atom equal to that of the nearest Nobel gas Neon which has 10 electrons. This completely fills...

Latest answer posted November 26, 2011 12:49 pm UTC

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Chemistry

Vanadium (V) oxide (V2O5) is used as a catalyst for the oxidation of sulfur dioxide to sulfur trioxide. It is able to catalyze this reaction because it releases oxygen (O2) when heated up. The...

Latest answer posted November 19, 2012 5:41 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

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

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

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...

Latest answer posted December 18, 2011 2:58 pm 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

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

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

3 educator answers

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

1 educator answer

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...

Latest answer posted April 10, 2011 7:50 pm UTC

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Chemistry

A homogeneous mixture and a heterogeneous mixture are first and foremost both mixtures. That means no chemical bonding has occurred between the substances within the mixtures. They can be...

Latest answer posted October 12, 2015 1:32 pm UTC

4 educator answers

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

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...

Latest answer posted July 12, 2012 7:49 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

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

A dielectric is a material that will polarize itself when subjected to an external electric field. The dielectric material itself is not a true conductor of electricity. But the partial positive...

Latest answer posted November 30, 2012 5:49 pm UTC

1 educator answer

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

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

1 educator answer

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

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...

Latest answer posted December 2, 2011 2:26 am UTC

1 educator answer

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