Search & Filtering
A sample of gas at 26°C has a pressure of 1.5 atm. Calculate the final pressure in atmospheres if the temperature is changed to 98°C at constant volume.
A fire extinguisher has pressure of 150 psi at 35°C. What is the pressure in atm if the fire extinguisher is used at a temperature of 80°C?
Freon-12, CCl2F2, is used in refrigeration systems. What is the new volume (L) of a 8.0 L sample of Freon gas initially at 500 mm Hg after its pressure is changed to 2200 mm Hg at constant T? (Boyle's Law)
A 95.5 grams of sodium sulfate (Na₂SO₄)is dissolved in 1150 grams of distilled H2O. Calculate the molality of the Na₂SO₄ solution.
Molar mass: Na = 23 g/mol ; S = 32 g/mol ; O = 16 g/mol
how many grams of O2 will react completely with 35.0 grams PH3?
What volume will 12 g of fluorine gas occupy at stp
“ All electronic configuration must always start with 1s” is a statement of?
When 0.935g of a fuel underwent complete combustion in excess oxygen, the increase of temperature of water in a calorimeter containing 1,365g of water was 2.40˚C. Calculate the higher calorific vale of the fuel, if the water equivalent of calorimeter, etc. is 135g.
The volume of a gas is 250 ml at 760 torr (1 atm) and 25 oC. If the pressure is held constant and the temperature is raised to 100 oC, what will be the new volume?
a. Calculate the mass of manganese (IV) oxide that can be synthesized from
15.00 grams of potassium iodide.
b. Calculate the percent yield of this experiment if a mass of 1.982 grams of
manganese (IV) oxide is produced.
c. Determine the percent error.
d. Compute for the excess amount of the excess reactant.
