# Alginate: Properties and Biomedical Applications

Topics: Mobile phone, Water, Concentration Pages: 2 (429 words) Published: October 1, 2014

As a side note, upon researching the molecular weight of sugar, I found it to be 342.30 g, not 331.23 g, however, in my calculation I used 15.00 g as the molecular weight of O2, whereas online 16.00 g was used. Eight8 g of sugar were placed on the scale, and then transferred into the volumetric flask (Table 8 shows the calculations of the molecular weight, moles, mass, volume and molarity recorded before doing so). Distilled water was added to the sugar until a total of 25mL were in the flask. Then the flask was capped, and the solution was mixed together until the sugar was dissolved. Once dissolved, the solution was transferred into the glass beaker, and certain aspects were measured and recorded in table 9. Once this step was complete, 2.5 mL were removed from the solution, and diluted in the volumetric flask. The steps were then repeated using different amounts of the diluted solution each time.This laboratory involved utilizing equipment to dilute a sugar water solution. It also created solutions containing varying levels of concentrations and densities. Equations were used to figure the molecular weight of the sugar, and the number of moles of sugar in the volumetric flask. There was also an equation to figure the Molarity, as well. As a result of the experiment, I now have a better understanding of the density of a concentration, and what Molarity is growth. egulate Use of Cell Phones on the Road

When a cell phone goes off in a classroom or at a concert, we are irritated, but at least our lives are not endangered. When we are on the road, however, irresponsible cell phone users are more than irritating: They are putting our lives at risk. Many of us have witnessed drivers so distracted by dialing and chatting that they resemble drunk drivers, weaving between lanes, for example, or nearly running down pedestrians in crosswalks. A number of bills to regulate use of cell phones on the road have been introduced in state legislatures, and the time has come...