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1. Using Avogadro's number, calculate the number of atoms in 0.005 kilograms of carbon.
2. If there are 'x' atoms in 5 grams of carbon, how many atoms are there in 5 grams of silicon?
3. If 10 grams of iron contain 'y' atoms, how many grams of aluminum will contain 'y' atoms.
(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds
Assume that an air conditioner consumes 1.50 X 103 W of electrical power, and that it can be idealized as a reversible Carnot refrigerator. If the coefficient of performance of this device is 2.50, how much heat can be extracted from the house in ..
In the boron trifluoride etherate-catalyzed reaction of acetic anhydride and salicylic acid to produce acetylsalicylic acid, or aspirin, anhydrous conditions prevail. So, what serves as the base, as water cannot?
Methyl orange is an indicator that changes color over a range from pH =3.1 to pH =4.4 . What is Ka of methyl orange
Problem- The city of LA is now 2400 mi south of alaska. If LA is to arrive near Anchorage Alaska in 76million years at what average rate will it have to move in mm per month
170mL of O2 gas is collected over water at 25 degrees C and the total pressure is 742 mm Hg. The vapor pressure of water is 23.8 mm Hg at this temperature. What would the volume of the dry gas be at STP? ( hint Daltons Law and Combination Law are ..
a sample of potassium hydrogen oxalate khc2o4 weighing 0.832 g was dissolved in water and titrated with 25.80 ml of
In order for a hydrogen atom to be capable of hydrogen bonding, what is required?
How much heat (in kJ) is needed when 58.9 g of water warms and boils from 47.91 degrees C to 100 degrees C
The same apparatus is then filled with an unknown gas at 32.3 C to a pressure of 645 mm Hg. It takes 5 hours 34 minutes and 25 seconds for the pressure to fall to 207 mm Hg. Calculate the molar mass of the unknown gas.
Sketch the temperature dependence for i) a simple paramagnet, (ii) ferromagnetically coupled material, (iii) antiferromagnetically coupled material
The de Broglie wavelength of a 455 kg car is found to be 5.43 *10-47 nm. Compute the speed (m/s) of the car.
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