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A 4.78 g sample of aluminum completely reacts with oxygen to form 6.67 grams of aluminum oxide. Use this date to calculate the mass percent composition of aluminum in aluminum oxide.
A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage. What is the pressure of the basketball outside where the temperature is -5.00°C?
Write an equation for determining the average atomic mass number of an element that has two isotopes. Isotope 1 has a relative abundance of 33%, and isotope 2 has a relative abundance of 66%.
what volume does .103 mol of N2 gas occupy at a temperature of 27 degrees Celsius and a pressure of 784 mm Hg?
Determine how many moles of each Na+ and Cl- are in 1.00L of the saline solution?
Assume that the H2O2 solution has a density of 1.0g/cm3. What would the mass of 35cm3 of the H2O2 solution be?
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
A 1 L flask is filled with 1.45 g of argon at 25 C}. A sample of ethane vapor is added to the same flask until the total pressure is 1.25 atm.what is the partial pressure of argon in the flask?
What you need to know about Problems, The Ksp of La(IO3)3 is 1.0×10-11. Using activities, what is the molar solubility of La(IO3)3 in a 0.050 M solution of NaNO3?
The feldspar sanidine KSi3AlO8 is found in quickly cooled volcanic (extrusive) rocks whereas microcline is found in slowly cooled intrusive rocks such as granites
In the purification process, the organic layer is washed sequentially with 2 M NaOH, water, and saturated aqueous sodium chloride. What is the purpose of each of these washes and why is cold 2 M NaOH recommended?
a 251 mL sample of oxygen is collected over water at 25 deg C and 760 torr pressure. If the vapor pressure of water as 25 deg C is 23.8 torr, what is the pressure of the dry gas alone?
a mass of 2.50 g of hydrated copper sulfate is placed in a crucible and heated. On hesting, 1.59 g of white anhydrous copper sulfate is left behind. determine the ratio of water to copper sulfate.
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