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What is the mass in grams of Al that were reacted with excess HCl if 1.28 L of hydrogen gas were collected at STP in the following reaction? 2 Al (s) + 6 HCl (aq) → 2 AlCl3 (aq) + 3 H2 (g)
What principle is being used here to determine the volume of the solid?
How many steps of crystallization you needed to do to get pure compound A? C) What is the amount of pure compound A after all crystallization steps? D) Calculate the percent recovery of pure compound A after all the crystallization st
A sample containing 33.87 g of metal pellets is poured into a graduated cylinder initially containing 10.8 mL of water, causing the water level in the cylinder to rise to 14.3 mL. Calculate the density of the metal. Answer must match significant f..
In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?
Give the structure of the sodium salt of methyl salicylate and in the second part of the experiment, what is the structure of the anionic form of salicylic acid before it is acidified with the dilute sulphuric acid?
The wavelength of the fundamental N-H stretching vibration is aobut 1.5 µm. What is the approximate wavenumber and wavelength of the first overtone band for the N-H stretch
According to molecular orbital theory which of hte following is not predicted to exist I know its He2 but how do you get bond order from that is there an easy way
A solution contains a mixture of 0.25 M Ni2+ and 0.25 M Cu2+. Na2CO3 is slowly added to the solution in order to separate the ions by selective precipitation. What is the [Cu2+] when NiCO3 begins to precipitate
What is the pH of a 0.50 M CH3COOH and 0.10 M NaCH3COO solution. The p Ka of acetic acid is 4.76.
when 0.6 g of impure zinc reacted with an excess of hydrochloric acid 135 ml of hydrogen was collected over water at
A sample of H2O with a mass of 46.0 grams has a temperature of -58.0C. How many joules of energy are necessary to melt 46.0 grams of ice.
The contents of one 40-lb bag of topsoil can cover 10.0 square feet of ground to a depth of 1.0 in. How many bags are needed to cover a plot that measures 200.0 meters by 300.0 meters to a depth of 4.0 cm?
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