Final temperature of the gold
A 4.10 g nugget of pure gold absorbed 278 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
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Draw the molecular orbital diagram for O2. Assuming that the 2p molecular orbital is from the 2pz atomic orbitals and that the two 2p orbitals are from the 2px and 2py atomic orbitals.
when 50. grams of ethane gas is burned completely in oxygen. Carbon dioxide and water vapor are produce. How many mole of water vapor are produced?
A sample of nitrogen gas in a 4.7-L container at a temperature of 28°C exerts a pressure of 3.6 atm. Calculate the number of moles of gas in the sample.
A perfect percent yield would be 100%. For each reaction, comment on your degree of accuracy and suggest possible sources of measurement error. How could these errors be reduced in the future?
A researcher plans to compare two treatment conditions by measuring one sample in treatment 1 and a second sample in treatment 2. Briefly explain how the difference simply may be sampling error.
How many grams of Cu metal (63.55 g/mol) will be plated out of a Cu(NO3)2 solution by passing a current of 3.00 amperes for 11 minutes?
How much heat is needed to melt 1050g of the unknown at 510k. the melting point of the solis unknown is 670k and the boilding point is 800k.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons. Show the formal charges of all atoms in the correct structure.
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