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1.What is the molality of the 50.0 mass % ethylene glycol (C2H602) solution in the water used for automobile antifreeze?
2. A 2.400×10-2M solution of NaCl in water is at 20.0°C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed was 999.4 mL. The density of water at 20.0°C is 0.9982 g/mL
a. Calculate the molality of the salt solution. to four sig figs
b. Calculate the mole fraction of salt in this solution. to four sig figs
c. Calculate the concentration of the salt solution in percent by mass. to four sig figs
d. Calculate the concentration of the salt solution in parts per million. - answer as an integer to four significant figures and include the appropriate units.
3. How many grams of a 1.5×10-3 m aqueous solution of nalorphine are needed to obtain a dose of 1.7 mg? 2 sig figs
at standard temperature and pressure 0 c and 1.00atm 1.00mol of an ideal gas occupies a volume of 22.4l. what volume
A hypothetical compound XY has an actual molar mass of 62.8562 g/mol, but it was experimentally determined to have a molar mass of 63.0196. Calculate the absolute and relative errors.
The jewlers' mass unit for dimond is the carat. By, definition, 1 carat equals exactly 200 mg. What is the volume of a 1.00 carat diamond
You recently have been hired as the company's new IT Director. One of the main projects that you have been tasked with is to establish an IT Help Desk to support the company's operations. This function does not currently exist, so you will start from..
Zinc chloride (ZnCl2) is 52.02% chlorine by mass. What mass of chlorine is contained in 65.0 g of ZnCl2?Answer in units of g.How many moles of Cl is this?Answer in units of mol.
liquid butane c4h10 is stored in cylinders to be used as a fuel. suppose 30.4 g of butane gas is removed from a
Does a weak acid have a low molarity? Please explain why if so.
What is the theoretical economy of heating A mixture of sodium carbonate and sodium bicarbonate ? sodium carbonate is the desired product and water and carbon dioxide are the undesirable wastes.
one type of electromagnetic radiation has a frequency of 107.1 MHz another type has a wavelength of 2.12*10^-10m,and another type ofelectromagnetic radiation has photons with energy equal to 3.97*10^-19J/photon. identify each type of electromagnet..
In a laboratory electrolysis experiment, 40mL of N2 gas and 60mL of O2 gas are liberated at the cathode and anode, respectively.
What is the concentration (in M) of the hydroxide ion when 19.4 mL of a 0.712 M solution of sodium hydroxide is combined with 15.9 mL of a 0.703 M solution of barium hydroxide? Assume the volumes are additive
Asswne the field oxide between an n+ poly-Si wire and the p-substrate is 0.3 j.lm thick and that Na = 5El7 cm-3.
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