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A certain type of nucleus has a half life of 32 min. What percent of the original sample of nucleotides remains after 3.0 hours has passed?
How many moles of Mg3N2 would be produced when 180.0 g of Mg reacts with 85.0 g of N2.
Calculate the amount of heat energy in each of the following: A) calories removed to condense 125g of steam at 100 degrees celsius and to cool the liquid to 15 degrees celsius
The total pressure of the container after the water condenses (5C) is .857 atm. What are the partial pressures of the 4 gases at 5C. e)What was the temperature of the container in Kelvin before it was cooled to 5C?
chromium crystalizes forming body center cubic unit cell length 280 pm. What is the radius of chromium atom in pm
A student was instructed to prepare 250 mL of a 0.500 mol/L solution potassium permanganate. What is the correct order for this
write equations for the chemical reactions that occurred between the aqueous solutions of the oxides of sulfur and calcium and between the aqueous solutions
Do the values bear out the assertion that hydrogen bonds are about one tenth as strong as covalent bonds? How does such a 'weak' force
Please give a description of one-shot play and an example dicussed from life experience. not text book examples
Explain how many moles of argon gas are in a sample that is collected over water at 27oC vapor pressure of water is 27torr if the volume of the gases is 430mL and the atmospheric pressure is 754torr
a 48.4 ml sample of gas in a cylinder is warmed from 19 degrees celsius to to 88 degrees celsius. what is its volume at
Which member of each pair should have the higher melting point? Use intermolecular forces to explain why.a. CO2 or CCl4
the temperature of a metal bar rises by 15 C when it absorbs 4.26 kJ of heat. The mass of the bar is 472g. Determine the specific heat of the metal bar.
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