Molar Relationships Lab Report

To begin this, experiment our group start to weigh three difference empty test tube to get their mass before we put any unknown salt in so we don’t make a calculated mistake. Zeroing the balance with the beaker inside, we put the test tube in the beaker to calculate the unknown hydrate mass.

To begin with, is the experimental process used to determine the identity of the rock. In doing so one will need to discover the density of the rock. By measuring the rock sample with grams per milliliter is a way used to figure out the density. In starting one will need to measure the mass of the rock using grams. Then using a set milliliter amount of a liquid substance, such as water, one will place the rock sample inside.

Calculate the mass of the isolated alum from the initial mass of the beaker and the mass with the sample. 2. Determine the theoretical yield of the alum in each trial. Use the aluminum foil as the limiting reagent and presume that the foil was pure aluminum. 3.

AP Chemistry Semester 1 Final Review 2016 Basics of Chemistry: Name the following compounds BO3 H2S NaOH OF8 PCl6 HNO3 HgNO2 Write the formula for each compound Pentaboron triselenide Sulfuric Acid Carbon Monoxide Lithium Chloride How many moles are in 58.6 g of AgNO3 How many grams are in 2.5 moles of Cl2

The method of messuring, after deviding the rest of beans in the plates, we measured the weight of each plate of the mug, black, and coffee beans. we had a total of two plates each for the beans mug, black, and coffee beans. for the mug bean plate one the total

Which of the following unit is used to indicate mass? a. Cm3 b. Um c. Mg d. mL 21. Which of the following demonstrate a chemical reaction of water?

It will be helpful to refer to your chemistry journal notes. Answer questions in complete sentences. Were any of your substances difficult to identify as polar, nonpolar, or ionic? Explain.

The question is, how does a physical or chemical change affect the mass of a substance within a closed system? To respond to this question, my group did a lab to determine whether or not the mass would change or not. Our lab was to have a plastic bag containing baking soda, then add a cup of vinegar and a block of clay to the mix. We made sure to weight every element separately and then add them up for our total mass of 31 grams before the reaction. During the reaction, as soon as the vinegar was poured in there was a gas produced, bubbles.

In this experiment, the mass of the object is the independent variable. Mass is how much material an object has. (Singh, Lakhmir, 2012) It is the only variable that will be changed throughout the experiment. The dependent variable is what one observes or measures.

Rapid Oxidation of Steel Wool Arby D. Dickert Western Governors University Rapid Oxidation of Steel Wool Abstract The rapid oxidation of steel wool involves an exothermic reaction of iron with oxygen. Due to the decrease in volume of the combustion products compared to the original sample, many students would expect the products would weigh less than the original sample. This investigation determines that the product weighs more than the sample and why this occurs.

The object was dried with a paper towel to avoid any water droplets and the mass balance was checked to read 0.0 g when nothing was on it. The first measurement that was retrieved as the mass of the metal object was 24.15 g. This was repeated for a second measurement of 23.85 g, and a final measurement of 23.82 g. All three mass measurements were recorded. Moving forward, to find the volume of the metal object, the graduated cylinder

Once we read, we then obtained the materials needed, which were an electrical balance, a nickel, golf ball, pencil, rock, an empty 100 ml beaker and a 100-ml beaker containing 50 ml of water.   After obtaining our materials, we turned on the balance and set it to weigh in grams. Then, we "zeroed" the balance and began placing each object on the balance. While placing each object on the balance, our lab partner, Sandra recorded the weights. Eventually, we finishing weighing each object, recording their weights and then we began converting the recorded measurements to the English system and calculating the density.

A mole is a unit of measurement that follows the rule of ; 1.00 mole = molar mass = 6.02 x 10^23 atoms/ ions/ molecules / formula units = 22.4 L of any gas at standard temperature and pressure. That formula was used to determine the mass of the anhydrated substance. A anhydrate is a substance with water heated out of it. The purpose of this lab was to determine how many moles of water are

Each group was assigned a different percent of sucrose solution out of the four variables; 0% , 5%, 10%, and 15%. After we filled the beaker we then got two potato cores. Once we had the cores we cut the skin off the ends. Following this we then cut the two potato cores into four 2.00 cm potato cores. After they were cut into 2.00 cm each we found the mass.

In this lab when looking at cells, we observed the salinity and osmolarity of the cell when placed in the environment. With the different concentrations of NaCl, we are able to see how different environment can constrain an organism and see the wide range of responses to regulate in cell’s osmolarity. The cells we studied was sheep red blood cells (erythrocyte), because they are the most studied membrane system and therefore used as ideal membrane to study the relationship between water and the passing of the different concentration of NaCl across the membrane. The purpose of the experiment was to observe the cell and infer which direction of the flow of the water due to the cell volume change.