Lab Report Unknown Sample

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Using elemental analysis to determine the percent mass composition of each element in a compound is the first step in creating an empirical formula. There are many different types of elemental analysis, but in this experiment gravitational analysis and Beer’s Law are used. Elemental analysis is first used to find the moles of each element, then converted to mass, and then the percent mass of the element in the product is found (2).

My unknown organism #6 is Morganella morganii, which is a gram-negative bacillus rods commonly found in the environment and also in the intestinal tracts of humans, mammals, and reptiles as a normal flora. (3, 5) This bacterium Morganella morganii, was first discovered in the 1906 by a British bacteriologist named H. de R. Morgan. (2) Despite its wide distribution, it is an uncommon cause of community-acquired infection and is most often encountered inpostoperative and other nosocomial settings. (2, 3) Morganella morganii infections respond well to appropriate antibiotic therapy; however, its

Once you have the mass of the gas, calculate the number of moles of CO2 that were produced in the chemical reaction between the vinegar and the 2 Alka-Seltzer® tablets?

Purpose: To find the relationship between the mass and the volume of the four samples.

Both experiments were able to determine the yield of hydrogen gas by testing the effect of limiting reactants, balanced equations, stoichiometry, mole ratios and molar masses. Balanced equations are equations that have a balanced number of moles of each element on both sides of the equation. Molar mass is the sum of the atomic masses of all elements combined in a chemical substance. Mole rations can be determined using the coefficients of the reactants and products in the balanced equation. Mole ratios can be used to relate moles of product formed from a certain number of moles of a reactant. Stoichiometry is the method of using the relationship between two or more substances in a chemical reaction. The limiting reactant of a chemical reaction is the reactant that is used up first in the reaction and limits how much of the product can be formed. In experiment 2-1, a company wanted to know if magnesium or aluminum would be practical to use as an alternative to zinc to produce a given volume of hydrogen gas. In experiment 2-2, the company wants to know how to optimize the production of hydrogen gas and whether hydrochloric or sulfuric acids are reasonable alternatives for gas production. The The reactions performed in experiment 2-1

To learn about balancing chemical equations and law of conservation of mass in chemical reactions

Masses of relevant equipment, reactants and products were recorded to be used later in calculations to determine the percent composition and empirical formula of magnesium oxide.

For example, Brooke and Lily’s mass of their reactants was 32.3 grams. Likewise, after their experiment was performed the mass was also 32.3

Using the direct weighing and weighing by difference methods to find weight and mass of chemicals and compounds.

In this lab relating to the Law of Conservation of Mass, the mass changed because the gas was released from the chemical reaction. The Law of Conservation of Mass demonstrates that before and after the chemical reaction, the mass of reactants and the mass of products have to be the same.

The law of conservation of mass states that atoms cannot be created nor destroyed during a chemical reaction. The mass of the reactants of an atom rearranges to form an equal mass of the products. An example of the law of conservation of mass in an everyday life is the combustion of a piece of paper burning. In the process of the paper burning, the paper forms into ash, water, and carbon dioxide. The mass of the paper does not destroy; instead, it transforms into another form. Assuming that the total mass of the compounds from the burning paper(products) is weighed, it still equals the mass of the paper(reactants). The purpose of this lab is to determine if the mass of the reactants will equal the mass of the products when the Acetic acid and

Discuss the qualitative information that can be determined from chemical formulas and balanced chemical equations:

The purpose of this lab was to test the law of conservation of mass by comparing the total mass of the reactants in a chemical reaction with the total mass of the product.

A mix-up at a local distribution company has occurred and the company needs assistance in determining which bicarbonate contains potassium and which possess sodium. Due to the uniquely opposite reactant properties each element contains, it is essential to determine and be positive of which bicarbonate is which. Three possible chemical reactions occur during the thermal decomposition of either bicarbonate. We are to use the predicted product masses of those reactions to determine if it has potassium or sodium, along with a flame test.