Chemistry Homework Help

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Dimensional Analysis

Q. How many hours are there in exactly 12 days? This answer has ____ significant figures.

Solved • Jan 20, 2020

Dimensional Analysis

Q. The vapor pressure of a substance describes how readily molecules at the surface of the substance enter the gaseous phase. At the boiling point of a liquid, the liquid's vapor pressure is equal to or greater than the atmospheric pressure exerted on the surface of the liquid. Since the atmospheric pressure at higher elevations is lower than at sea level, the boiling point of water decreases as the elevation increases. The atmospheric pressure at sea level is 760 mm Hh. This pressure decreases by 19.8 mm Hg for every 1000-ft increase in elevation. The boiling point of water decreases 0.05 °C for every 1 mmHg drop in atmospheric pressure. What is the boiling point of water at an elevation of 1.35x10^4 ft? Express your answer with the appropriate units using three significant figures.

Solved • Jan 20, 2020

Dimensional Analysis

Q. What is the conversion factor of m ^3 to in^3

Solved • Jan 14, 2020

Dimensional Analysis

Q. The density of mercury (Hg, atomic mass 200.59 g/mol) is 13.53 g/cm. The number of moles of Hg in 1.00 x 10^3 nm^3 of pure Hg is ______. a. 6.75 x 10^-20 mol b. 6.75 x 10^-15 mol c. 67.5 mol d. 6.75 x 10^+3 mol

Solved • Jan 9, 2020

Dimensional Analysis

Q. Silver chloride (AgCl) is relatively insoluble in water. At 25 C, 1.3 x 10^3 L of water is needed to dissolve 2.5 g of AgCl. What mass (in milligrams) of AgCl will dissolve in 1.0 L of water?

Solved • Dec 19, 2019

Dimensional Analysis

Q. Luis went camping and found a bag with 2500 silverish looking metal cubes in a cavern in the hills of Yosemite. These cubes have a height of 10 cm. He believes it is either silver, aluminium, or nickel. Remembering you were a chemistry genius, Luis promises to give you 500 cubes of the metal if you can tell him what the metal it is. Using 250 mL of each following solution at the stated concentrations. You have to use your cubes to identify after all the reactions determine how many grams of solid metal will be left. Calculate how much money you can make if you sold the metal Luis will give you. Explain how you figured out the identity of the metal.

Solved • Dec 6, 2019

Dimensional Analysis

Q. In Ch.0 - Essentials: Units, Measurement, and Problem Solving (exam practice), Is 1dm^3 = 1L a conversion factor that should be memorized? As i'm doing an exam review I am confused where the 1dm^3 = 1L is coming from.

Solved • Dec 5, 2019