2 attempts left Check my work Enter your answer in the provided box. Hemoglobin is the...
2 attempts left Check my work Enter your answer in the provided box. Hemoglobin is the protein that transports 02 through the blood from the lungs to the rest of the body. In doing so, each molecule of hemoglobin combines with four molecules of O2. If 1.59 g of hemoglobin combines with 2.47 mL of O2 at 37°C and 731 torr, what is the molar mass of hemoglobin? 1 x10 g/mol
Enter your answer in the provided box. Hemoglobin is the protein that transports 02 through the blood from the lungs to the rest of the body. In doing so, each molecule of hemoglobin combines with four molecules of O. If 1.58 g of hemoglobin combines with 2.48 mL of O2 at 37°C and 724 torr, what is the molar mass of hemoglobin? 10 g/mol (Enter your answer in scientific notation.)
3 attempts left Check my work Enter your answer in the provided box. A sample of chlorine gas occupies a volume of 823 mL at a pressure of 609 mmHg. Calculate the pressure of the gas (in mmHg) if the volume is reduced at constant temperature to 215 mL. Enter your answer in scientific notation. mmHg
2 attempts left Check my work Be sure to answer all parts. Enter your answer in scientific notation. Calculate K, for the following equilibrium: 2502(g) + O2(g) = 2803(); K = x 10 Kn=2.5 x 1010 at 725 K.
2 attempts left Check my work Enter your answer in the provided box. A solution of 1.15 g of solute dissolved in 25.0 mL of H20 at 25°C has a boiling point of 100.750°C. What is the molar mass of the solute if it is a nonvolatile nonelectrolyte and the solution behaves ideally (d of H20 at 25°C = 0.997 g/mL)? g/mol
3 attempts left Check my work Enter your answer in the provided box. Consider the reaction: 2NO(g) + O2(g) → 2NO2(g) Suppose that a particular moment during the reaction nitric oxide (NO) is reacting at a rate of 0.018 M/s. At what rate is molecular oxygen reacting? Molecular oxygen is (select at a rate of
3 attempts left Check my work Enter your answer in the provided box. A 0.2123-g sample of a monoprotic acid neutralizes 25.6 mL of a 0.06903 M KOH solution. Calculate the molar mass of the acid. g/mol
2 attempts left Check my work Enter your answer in the provided box. Insulin is a polypeptide hormone released from the pancreas that stimulates fat and muscle to take up glucose. In a certain patient, it has a first-order half-life in the blood of 3.9 min. To maintain an adequate blood concentration of insulin, it must be replenished in a time interval equal to 1/k. How long is the time interval in this patient? min
2 attempts left Check my work Enter your answer in the provided box. Many drugs decompose in blood by a first-order process. Two tablets of aspirin supply 0.60 g of the active compound. After 30 min, this compound reaches a maximum concentration of 2 mg/100 mL of blood. If the half-life for its breakdown is 90 min, what is its concentration (in mg/100 mL) 2.5 h after it reaches its maximum concentration? mg/100 mL
5 attempts left Check my work Enter your answer in the provided box. Nitrogen dioxide is used industrially to produce nitric acid, but it contributes to acid rain and photochemical smog. What volume of nitrogen dioxide is formed at 725 torr and 28.2°C by reacting 3.31 cm of copper (d=8.95 g/cm) with 229 mL of nitric acid (d - 1.42 em 68.0% HNO, by mass)? Cu(s) + 4HNO3(aq) + Cu(NO3)2(aq) + 2NO2(8) + 2H20(1) 23.04 10