Determining the molar mass of a vapor
Calculate the molar mass of a vapor that has a density of 7.535 g/L at 14°C and 743 torr.
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Compare the properties of elements and compounds. Give two examples of each, including one example that exists in the human body. Explain the atomic nature of one element and one compound found in human body.
A gas sample containing 1.55 mol at 25°C exerts a pressure of 387 torr. Some gas is added to the same container, and the temperature is increased to 50.°C. If the pressure increases to 800. torr, how many moles of gas were added to the con
The canister is placed in an oven until all the has boiled off and the canister is empty. How much energy in calories was absorbed?
The Hope diamond weighs 44.0 carats. Determine the volume occupied by the diamond, given that its density is 3.5 g/cm3 at 20°C, and that 1 carat = 0.200 g.
A toothpaste contains 0.24 % by mass sodium fluoride, NaF and 0.30 % by mass of triclosan, C12H7Cl3O2. The mass of one tube of toothpaste is 119 g. a) How many moles of C atoms are in the toothpaste?
The carbon dioxide that is exhaled by astronauts who are on a space shuttle is scrubbed by pumping the air through canisters of lithium hydroxide, LiOH.
What concentration of aqueous NH3 is necessary to just start precipitation of Mn(OH)2 from a 0.020 M solution of MnSO4? Kb for ammonia is 1.8 x 10-5, Ksp for Mn(OH)2 is 4.6 x 10-14
What is the actual amount of magnesium oxide produced when excess carbon dioxide reacts with 42.8grams of magnesium metal?
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