Nitrous oxide

The antimicrobial applications of metal NPs is currently interview of the hour , is due to the growing microbial resistances to multiple antimicrobial agents and the development of resistant strains. Their high surface area to volume ratio compared to bulk material, provides a large active surface with large number of the low coordinate atoms, available to interact with microbial membranes or to release metal ions. Among the others metal NPs, the recent interest in the CuNPs is propelled by both

Introduction: The main purpose of this experiment is to determine the empirical formula of zinc iodide, and in addition, validate the law of conservation of mass by precisely determining the quantities of reactants and products. Empirical formula is the simplest type of chemical formula. The simplest ratio of the number of atoms of each element in the compound is determined by the empirical formal of a compound. Typically the ratio provided by the empirical formula contains whole numbers. On the

precipitate was allowed to settle to repeat the decanting process again. In the fourth reaction, 15 mL of 6.0 M sulfuric acid was added to the copper (II) oxide while stirring. The balanced equation for this reaction is as follows: CuO (s) + H2SO4 (aq) à CuSO4 (aq) + H2O (l) + SO2 (g) When the sulfuric acid was added to copper (II) oxide, the solution turned blue. This was due to the formation of aqueous copper (II) sulfate, which produced the copper ions to change the color of the solution

Empirical Formula Of Magnesium Oxide The goal of the assignment was to determine the empirical formula based on the reaction of Magnesium and oxygen. Empirical Formula is a calculation to find the lowest whole number ratio of elements within a compound. To find the empirical formula, first the student must assume that the total mass is 100g for each element if the problem given is a percentage, then convert mass to moles, after that, divide each mole by the lowest value of moles calculated

Title: Percent Composition of an Oreo Cookie Purpose: The purpose for this experiment is to ensure our understanding of percentage composition, as well as prepare us for writing more in-depth lab reports later on. Our objective was to find the percentage composition (by mass) of an Oreo cookie. From closely inspecting the Oreo cookie, my hypothesis was that the per cent composition of the Oreo cookie is 60% chocolate wafer and 40% cream. This hypothesis is mainly based on visuals, however since percentage

Final Exam Firstly, we have to assume what metal oxide was Timmy playing with. Since most of the basic oxides have similar properties, we can assume that he was using an oxide of a metal, that is beneficial for the human body (this way its base can be transformed into a solution, safe for consumption) (). The most common metals, that have that property, are K and Ca (). Another very important thing, that should be considered, is what compound can react with either K2O or CaO, in order to produce

PERIOD 3 OXIDES These pages explain the relationship between the physical properties of the oxides of Period 3 elements (sodium to chlorine) and their structures. Argon is obviously omitted because it doesn't form an oxide. A quick summary of the trends The oxides The oxides we'll be looking at are: |Na2O |MgO |Al2O3 |SiO2 |P4O10 |SO3 |Cl2O7 | | | | | |P4O6 |SO2 |Cl2O | Those oxides in the top

synthesis of a wide range of materials especially metal oxides such as hematite and quartz. Hydrothermal synthesis of quartz was demonstrated several decades ago and now currently used commercially. The traditional hydrothermal synthesis method is carried out in an autoclave type reactor where an aqueous solution is heated slowly to a certain temperature and then aged for several hours or days. In the case of the formation of metal oxides, hydrothermal synthesis method is generally involve two reactions

produce a product of 75% silica (SiO2) and 25% sodium oxide (Na2O). This mixture will melt and fuse at a much lower temperature of 800°C. Unfortunately, the glass produced with this composition is water-soluble which is also known as water glass. This is not suitable for glass bottle since it need to contain water so, to stabilise the glass, other chemical substance is mixed into the composition such as calcium oxide (CaO) and magnesium oxide (MgO). The chemical mixtures are obtained by the addition

is “’rainfall made so acidic by atmospheric pollution that it causes environmental harm, chiefly to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulphur and nitrogen oxides which combine with atmospheric water to form acids.” In Northern Europe and North America millions of trees have died because of the causes of acid rain. Some lakes contain so much acid that all the fish have died and the birds that relied on this