Cold symptoms usually begin with a sore throat, which usually goes away after a day or two. Nasal symptoms, runny nose, and congestion follow, along with a cough by the fourth and fifth days. Fever is uncommon in adults, but a slight fever is possible. Children are more likely to have a fever with a cold. With cold symptoms, the nose teems with watery nasal secretions for the first few days. Later, these become thicker and darker. Dark mucus is natural and does not usually mean you have developed a bacterial infection, such as a sinus infection.
3) Find the mass of the graduated cylinder with 50ml of unknown liquid #1. 4) Repeat steps 1-3 for unknown liquid #2. We can calculate density of a liquid using the formula: Density= Mass/Volumewhere mass is that for just the liquid (you must subtract out the mass of the graduated cylinder). Density= Mass/Volume.
Multiply the pressure and molecular weight, and then divide by temperature T and gas constant to calculate the density (g/cubic meter). In our example, the density of CO2 is 202,650 Pa x 44 g/mole / (8.3145 x 300 K) = 3,574.71 g / cubic meters. Divide the density in g/ cubic meters by 1,000 to compute it in g/L. In this example, the density = 3,574.71 /1,000 or 3.57 g/L. Note that results in Steps 4 and 5 are rounded to the second decimal point.