what is the weight in grams of 300 ml of alcohol with a specific gravity of 0.80

ATES OF MATTER Solving applied mass concentration problems GenAlex Medical, a leading manufacturer of medical laboratory equipment, is designing a new automated system that can detect normal levels of dissolved triiodothyronine (230. to 660. pg/dL), using a blood sample that is as small as 150 µL. Calculate the minimum mass in picograms of triiodothyronine that the new system must be able to detect. Be sure your answer has the correct number of significant digits. Pg X 3/5 S

I need to make a solution containing 0.025 grams per liter. However, I do not want to weigh 0.025 grams and put this in one liter of solvent.  I want to make a stock solution of 0.25 grams in 500 ml of solvent and take a unknown aliquot and dilute this in 500ml of solvent instead of 1000 ml of solvent. How do I calculate the volume of aliquot from the stock solution to achieve a final concentation of 0.025 grams per liter? What is the proper equation(s) required to figure out the proper aliquots required?

Calculate the volume of stock glucose solutions (2.5 % and 15%) that need to be used to prepare 800 mL of glucose solution with a concentration of 13%. In this case % refers to the grams of glucose per 100 mL of water. V1= volume of stock solution with concentration C (2.5%) V2= volume of stock solution with concentration C2 (15 %) You need to determine V, and V2 in mL

You are a chemist and FBI crime scene investigator and find a sealed bag containing a suspicious white substance. The substance turns out to be a powder containing fentanyl (C22H28N2O, 336.470 g/mol) and lactose (C12H22O11) 342.298 g/mol). To find out exactly how much fentanyl was in the bag, you use a 100.0 mL volumetric flask to dissolve 1.000 g of the white powder in water. The osmotic pressure for the solution at laboratory temperature, 21.7 °C, is 538.2 mmHg. What percent of the white powder is fentanyl?

H2S + 2 NaOH  Na2S + 2 H2OCalculate the normality of a solution that contains 3.10 grams of H2S in 843 mL of solution.  ____N

Then, why  8.56 % = (42.8 g/volume of the solution) × 100 % Volume of the solution = [(42.8 × 100)/8.56] mL becomes 500mL not 500g?

Chemistry 64 g of Na2SO4 in 285 mL of Na2SO4 solution. what is mass/volume percent if the bottle of mouthwash contains 370 mL what is the volume in milliliters of the alcohol?