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Express the concentration of a 0.0510 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
If 750 grams of ammonia and 750 grams of oxygen gas were mixed, what maximum mass of nitrogen monoxide could be produced
Use the ? - l?+ convention and the crossed arrow to show the direction of the expected polarity of the indicated bonds in the following compounds.
When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid. Assume water has a density of 1.00 g/cm3 at the temper
What mass (in grams) of the mineral ilmenite, FeTiO3, is required if you wish to obtain 7.50x103 grams of titanium metal (Ti) from the ilmenite
Express the concentration of a 0.0480 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
In one experiment, when 112 grams of calcium oxide was mixed with 224 grams of ammonium chloride, 16.3 grams of ammonia was produced. What is the percent yield of ammonia in the experiment
Calculate the molarity of a solution made by adding 22.1 mL of concentrated ammonia (28.0 % by mass, density 0.880 g/mL) to some water in a volumetric flask, then adding water to the mark to make ex
Write an equation to show how diethyl malonate can react with sodium ethoxide, Na+OCH2CH33, in an acid-base reaction.
What is the work exchanged between the system(gas) and its surroundings. What is the change in internal energy of the gas. What is the change in enthalpy of the gas
Can SO2 be maintained a liquid under a pressure of 100atm at 0 C. Can liquid methane be obtained under the same conditions.
why is lithium chlorate be a more practical choice for the "chlorate candle" than either sodium or potassium chlorate
What is the pressure of the gas in kPa. The gas is heated by raising the piston by 1.20 m. How much work is performed by the expanding gas
What is the maximum kinetic energy of a photoelectron ejected from cesium by 555 nm light? Note that if the wavelength of the light used to irradiate the cesium surface becomes longer than 660 nm, n
The Specific Heat of a cooling oil is 1.75 J/g. How much heat energy is neededto raise he temp of 2.72 kg of this oil from 23 C to 191 C.
Na2CO3 is dissolved in approximately 25 mL of distilled water. How many grams of Na2CO3 are required to react with approximately 25 mL of 0.1 M HCl
Calculate the volume of approximately 37 wt% HCl that should be added to 1 L of distilled water to produce 0.1 M HCl
Calculate the grams of potassium hydrogen phthalate required to react with approximately 25 mL of 0.1 M NaOH
Understand how the ability to form hydrogen bonds gives water cohesiveness and how this property is exploited by living things.
where a is constant and -infinity <x< infinity (a) normalize this function and (b) calculate the probabiltiy of finding the particle in the range -a equal to or greater than x equal to or grea
Why are some covalent bonds polar and others aren't? Understand why the covalent bonds of water are polar and those in the hydrogen molecule (H2) are non-polar.
Identify the intermolecular forces present in each of these substances. HCl, He, CO, HF Match these to the correct groups below. Dipole-dipole and dispersion only, Dispersion only
A buffer contains 0.010 mol of lactic acid (pKa=3.86) and 0.050 mol of sodium lactate per liter. Calculate the change in pH when 5mL of 0.5M NaOH is added to 1L of the buffer.
An enzyme-catalyzed reaction was carried out in a 0.2M "Tris" buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1). What was the ratio of Tris+