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A sample of ethanol (C2H5OH) has a mass of 43.8 g.(a) How many carbon atoms does the sample contain?(b) How many hydrogen atoms are present?(c) How many oxygen atoms are present?
If 125 calories of heat is applied to a 60.0 grams piece of copper at 21.0 degrees Celsius, what will the final temperature be? The specific heat of copper is 0.0920 calories per grams times Celsius.
Consider an area-source box model for air pollution above a peninsula of land. the length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m.
Ammonia burns in pure oxygen and reaction produces nitrogen and water. What is the amount of Nitrogen produced from 45.0 g NH3?
Deuterium oxide (D2O, where D is deuterium, the hydrogen-2 isotope) has an ion-product constant, Kw, of 8.9 x 10^-16 at 20 *C (degrees Celsius). Calculate [D+] and [OD-] for pure (neutral) D2O at this temperature.
The running engine of an automobile preoduces carbon monoxide Co, a toxic gas at the rate is of about 0.117 mol CO per minute. A car is left idling in a poorly ventilated garage that is 6.0m long 4.0m wide and 2.2 m hight and 20.0 C.
What is the boiling point of a mixture composed of 95.0 g HOCH2CH2OH (ethylene glycol) and 205 g H2O? The boiling point elevation constant for H2O is 0.512 °C/m.
How much heat is required to vaporize 351 g of liquid ethanol at its boiling point.
You have 250.0 mL of 4.00 M sugar solution. You add 319.7 mL of water to this solution. Determine the concentration of the sugar solution after the water has been added.
A sample of a dish from an archaeological dig gave 18 500 disintegrations per gram of carbon per day. A 1.00-g sample of carbon from a modern source gave 22 080 disintegrations per day.
Compute the ratio of the concentration of H 2 CO 3 to that of the HCO 3- if The pH of a bicarbonate-carbonic acid buffer is 8.50
Chlorine has an average atomic mass of 35.453 amu. The main isotopes of chlorine are 35Cl which has an atomic mass of 34.968 amu and 37Cl, which has an atomic mass of 36.956amu. Given this, what is the percent abundance of each isotope in natural ..
A synthetic organic chemist wants to make 100.0 grams of benzoyl chloride C7H5OCl from benzoic acid C7H6O2 in the following reaction.
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