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An unknown compound contains carbon, hydrogen, oxygen, and sulfur atoms. When a 10.00 mg sample of the unknown compound was combusted, it produced 16.27 mg of CO2, 5.55 mg of water, and 7.90 mg of SO2. What is the empirical formula of the unknown compound?
What main type of intermolecular attraction would you expect for cl2c0?
A mixture of 4.50 g of He, 12.0 g of Ne, and 29.0 g of Kr is placed in a cylinder at STP. Calculate the partial pressure of each gas.
Calcium in a mineral was analyzed five times by each of two methods. Are the mean values significantly different at the 95% confidence level? Method1: 0.0271 0.0282 0.0279 0.0271 0.0275 Method2: 0.0271 0.0268 0.0263 0.0274 0.0269 Chemistry
What is the rate constant for the reverse reaction at the same temperature?
Measurements also show that a certain sample of the unknown compound contains 9.8 mol of oxygen and 3.31 mol of chromium.
A piece of metal with a mass of 146 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?
The fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from reservoir.
Calculate the mass of HONH2 required to dissolve in enough water to make 250.0 ml of solution having a pHof 10.00 (Kb=1.1*10 (-8).
It takes 47.0 to raise the temperature of an 11.7 piece of unknown metal from 13.0 to 24.4. What is the specific heat for the metal?
Hydrogen was cooled from 150 c to 50 c. It's new volume is 75 ml. What was the original volume?
calculate the expected pH value of the buffer system 5mL .1M CH3COOH + 5mL .1M CH3COO-Na+ using the henderson-hasselbalch equation using the pKa values: carbonic acid= 6.37 and acetic acid=4.75
The mass spectrum of an organic compound shows the relative abundances of M to be 62.87% and M 1 to be 4.760%. Assuming the peaks are caused by 12C and 13C isotopes,
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