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Chemistry
When we say denser, it simply refers to the density of a substance. The substance with a higher density is denser as compared to the other substance/s. Density of an object is the ratio of its mass...
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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...
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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...
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Chemistry
Types of Electrolytes An electrolyte is a substance that will conduct electricity when dissolved in water. When electrolytes dissolve in water, they disassociate into positive and negative ions....
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Chemistry
Option (C) is the correct answer to this question. Explanations as to why the other options are not the correct responses are found below. Option (A) is not the correct answer because...
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Chemistry
Actually, what you are asking for is simply not possible. Both salt (sodium chloride) and sand are powdery solids. As a result, they cannot be mechanically separated by simply picking the...
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Chemistry
Acid-base titration is a chemical method to determine the concentration of either the acid or the base. It is based on the fact that acid and base neutralize each other completely. This reaction...
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Chemistry
Let me start by saying that energy is a flow, not a cycle. The reason it is a flow is because it has a starting place and an ending place. Fossil fuels all originally got their energy from the...
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Science
The elements that are part of group 7 of the periodic table are fluorine, chlorine, bromine and iodine. The elements fluorine, chlorine, bromine and iodine in this order display an increasing...
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Science
pH is a measure of the concentration of the hydronium ions present in the solution. To solve for the pH of a particular solution, we can use: `pH = -log[Acid] = -log[H^+]` `pH = -log (1.0x10^(-4))...
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Science
For the determining which atom loses an electron and which atom gains an electron, it is often very useful to consult the periodic table. From there, we are able to examine the chemical properties...
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Science
Answer is D i.e. None of the above
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Science
When calcium reacts with chlorine, calcium chloride is formed. The balanced chemical reaction of this equation is `Ca + Cl_2 -> CaCl_2` . One mole of calcium reacts with one mole of chlorine gas...
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Science
Calcium Chloride can be prepared from the reaction of metallic calcium with elemental chlorine as per the reaction: `Ca + Cl_2(g) rarr CaCl_2(s)` Molar mass of Calcium is 40.08 g/mol. Use of 5.3 g...
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Science
In the problem, the following information is provided: The heat of formation of `NO_2` from `N_2` and `O_2` is 68 kJ. The heat of formation of `NO_2` from NO and `O_2` is -131 kJ. The heat of...
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Science
The balanced chemical reaction of the HCl reacting with `BaOH_2` is: `2HCl + BaOH_2 -> BaCl_2 + 2H_2O` In reactions involving titration first determine the number of H+ and OH- ions liberated by...
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Science
In an elimination reaction, a pi-bond is formed by sidewise overlap of two orthogonal p-orbitals, one on each carbon undergoing elimination reaction. These p-orbitals evolve as the C-atoms...
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Science
40 g of calcium (Ca) reacts with 0.4 M hydrochloric acid (HCl). The balanced equation for the reaction is: `Ca + 2HCl -> H_2 + CaCl_2` From the balanced reaction 1 mole of calcium requires 2...
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Science
First, we have to consider that there are three phases in this problem. Water exists in three phases: solid, liquid and gas. We started by heating the solid water at -20 degrees Celsius up to 0...
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Science
The volume of n moles of a gas at temperature t , and under pressure p is equal to v where p*v = n*r*t. Here, r is a constant equal to 0.082 L*atm/K*mol.The balloon is filled with 6 moles of...
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Science
Ammonia (NH3) is an amine gas that is produced via an industrial chemical reaction called the Haber process. It is shown below. N2 + 3H2 --> 2NH3 During the Haber process, nitrogen gas (N2) and...
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Science
2AgNO3 + CaBr2 --> 2AgBr + CaN2O6 We have 28 g of AgNO3. We can see from the above balanced chemical equation that for every two moles of AgNO3 we need one mole of CaBr2. So let's convert the...
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Science
6ClO2 (g) + 3H2O(l) --> 5HClO3 (l) + HCl (g) The question you are asking deals with the concept of the limiting reagent. We use the balanced chemical equation to compare the moles of each of...
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Chemistry
NO2 + O2 --> NO + O3 In order to find the limiting reagent, first we must convert the mass in grams for each reagent into moles. 5.20 g NO2 (1 mole/46 g) = 0.113 moles NO2 3.90 g O2 (1 mole/32...
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Science
Charles law is the law that an ideal gas obeys when it is subjected to a transformation under constant pressure. It is a relation that relates the volume of a gas `V` to its absolute temperature...
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Science
Actually, NH4Cl and KOH will react with each other. NH4Cl contains the ammonium ion (NH4+). This is mildly acidic and will release a proton to produce ammonia (NH3). The hydroxide from the KOH...
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Science
All matter can be classified as mixtures, elements and compounds. Mixtures – two or more substances that are not chemically combined with each other and can be separated by physical means. The...
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Science
We can use the Boyle’s law in order to solve the problem. We know that pressure is inversely proportional to the volume of the gas. Having said that, the expression can be written as:...
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Science
Yes, two different chemical entities can be separated based on their densities, assuming that the densities of the two items are different enough from one another. Solids and liquids can easily be...
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Chemistry
I am to answer your first couple of questions and leave the last one for your practice. 6. The compound contains 48.8% cadmium, 20.8% carbon, 2.62% hydrogen, and 27.8% oxygen. Overall, sum of the...
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Chemistry
The compound is made up of iodine and cerium. A 6.21 gram sample of the compound contains 4.54 grams of iodine and 1.67 grams. The molar mass of iodine is 126.9 g/mole and the molar mass of cerium...
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Chemistry
C2H5OH+3O2=3H20+2CO2
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Science
The heat of reaction of a particular chemical reaction can be expressed as: `H_(reaction) = sum[n Delta H^0_(f) p r oducts] -sum[n Delta H^0_(f) react a nts ] ` Where n = number of moles in the...
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Science
CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g) deltaH=-802.4 kJ/mol CH3OH(g) + 3/2O2(g) --> CO2(g) + 2H2O(g) deltaH=-676 kJ/mol You had left out the CO2 term in the first reaction so I added it...
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Science
In chemistry, when we talk about a change we are talking about one of two types of changes: physical and chemical. A chemical change is a change whereby the actual chemical identity of the...
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Science
You are talking about Infrared Spectroscopy, usually abbreviated to IR. This is an analytical instrumentation technique that involves exposing a chemical sample to numerous wavelengths of light...
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Science
This all has to do with what ions an element will form. Once you know what type and what charge of ion an element tends to form, then you can combine the different elemental ions together in the...
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Science
What an interesting question! I can honestly say I haven't heard of this before or even really considered it before! In order to solve this, we first need to find the mass of the Earth and the...
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Science
For such a commonplace chemical, soap is actually quite interesting in how it works. It is actually made from fats, which are composed of a central triglyceride with three long chain, greasy fatty...
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Science
Sulfur is a pretty common and highly versatile chemical element. It can be found in pure elemental form, or it can be found in sulfide compounds or in oxidized form in sulfate and sulfite salts....
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Science
This type of analysis is called elemental analysis. This is where a measured sample of an unknown compound is thermally combusted in the presence of excess oxygen gas in a sealed system to produce...
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Chemistry
This was actually pretty tricky. Start at the top with the largest level of biological chemistry (organism). The first big split seems sensible for dividing organic and inorganic (since that is a...
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Science
The Earth's atmosphere is made up of different gasses, but the main two gasses are nitrogen and oxygen. In fact, nitrogen makes up for about 78% of the atmosphere, oxygen makes up for about 21% of...
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Science
The chemical substance we are dealing with here is water. On a very cold day if a person does not have their windshield defrost on, raindrops falling from the sky onto the freezing windshield will...
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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...
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Science
Hydrofluoric acid is denoted as HF. Pure HF is called hydrogen fluoride and it exists as a gas. Hydrofluoric acid is a saturated aqueous solution of HF, so it is in liquid form. HF is actually...
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Science
I believe that you are asking for the concentration of each ion present when the two solutions are mixed. Since we are dealing with HCl (hydrochloric acid), this is a strong acid that will...
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Science
A reaction that forms a precipitate is one in which two different solutions are mixed, thus forming a particular product that is not soluble in the solvent and crashes out, or precipitates, as a...
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Science
Long before it was isolated as a pure metal, aluminum was used in the form of ionic salts as early as ancient Greek and Roman times. Aluminum salts like alum (potassium aluminum sulfate) are...
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Science
The effective nuclear charge is the positive charge experienced by a particular electron from the nucleus that it is surrounding. The distance of the electron from the nucleus coupled with a...
