Stoichiometry Question

Stoichiometry Question NASA’s long term plans for sending astronauts to Mars involves an “ISRU” strategy. ISRU is in-situ resource utilization and means that to the extent possible, chemical resources already on Mars will be utilized. The Martian atmosphere contains about 95.3% carbon dioxide. According to o ...continues

Chemical Conversion Problem

How do I make a 0.4mg/kg dose of Na2SeO3 (sodium selenite FW=172.9)? I need to prepare a stock solution (10mls) of sodium selenite dissolved in deionized water. Once this solution is made, I need to administer 0.4mg/kg of this compound to a 200g lab rat. The stock solution needs to be made first and then the lab rat ...continues

Calculations

Please show me how these problems are correctly solved: 15. The density of liquid water at 0 degrees C is 0.9987 g/cm cubed; the density of ice at this same temperature is 0.917 g/cm cubed. a. Calculate the volume occupied at 0 degrees C by 100. g of liquid water and by 100. g of ice. b. Calculate the percentage increase ...continues

Density of ice/water, conductivity, and fuel calculations

15. The density of liquid water at 0 degrees C is 0.9987 g/cm cubed; the density of ice at this same temperature is 0.917 g/cm cubed. a. Calculate the volume occupied at 0 degrees C by 100. g of liquid water and by 100. g of ice. b. Calculate the percentage increase in volume when 100. g of water freezes at 0 degrees C. 1 ...continues

Chemistry - Gases

Chemistry - Gases Using "dimensional analysis" show that 1 L kPa = 1 J. Hints : P= F/A; 1 Pa = 1 N/m^2; energy = F x d

The relation between pressure volume and temperature with respect to ideal Gases

If a gas occupies 625mL at 0 C and 760 torr pressure, what will its volume be at 273 C and 1520 torr pressure?

Calculating moles of reactants and products and interchanging between volume and moles at constant pressure

The following reaction is used in laboratories to produce oxygen: 2KclO3 (s) + 2KCl (s) + 3O2 (g) At 25 degrees Celsius and one atmosphere pressure, how many liters of O2 gas will be produced from the reaction of 165g of KClO3?

interchange between units in this case those of force, pressure and distance and an insight to dimensional analysis

Using "dimensional analysis" show that 1 L kPa = 1 J. Hints : P= F/A; 1 Pa = 1 N/m^2; energy = F x d

Assume that Isaac Asimov’s figures are correct...

Assume that Isaac Asimov’s figures are correct, and that 3.5 X 10 to the 14th power of the 3.0 X 10 to the 26th power carbon atoms in your body are radioactive. Calculate the fraction of carbon atoms that are radioactive carbon-14. Natural sources of radiation account for 82 % of all public exposure while human-made sources a ...continues

Chemistry - Calorimetry

Chemistry - Calorimetry Coal used to fire a power plant has an energy value of 13,250 Btu/lb. A 0.2500 g sample of this coal is combusted in a bomb calorimeter with a heat capacity of 4,589 J/K. Calculate the temperature rise of the calorimeter?