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Determine the number of chloride ions in 11.73 g of magnesium chloride.
Why is it organized in this way? Why is the presence of ozone in the stratosphere important to us? Why does the presence of CFC"s in the stratosphere interfere with this process?
Determine the number of moles of hydrogen atoms when you are given 2 moles of water.
The density of liquid water at 0 degrees Celsius is 0.9987 g/cm^3; the density of ice at this same temperature is 0.917 g/cm^3. Calculate the volume occupied at 0 degrees Celsius by 100.0 g of liquid
Identify any incorrect formulas. explain your answer.
The 20 degrees C water in the Calorimeter then becomes 29 degrees C. Estimate the specific heat and atomic weight of the Iron. Use 1 cal/g°C for water.
What is the theoretical amount of water (MW 18.02 g/mol), in grams, that could form when 26.67 grams of aluminum oxide (MW 101.96 g/mol) reacts with excess hydrogen gas (MW 2.02 g/mol) to produce w
A total of 17.34 mL of 0.122 M H2O2 titrant is required to completely neutralize 25.00 mL of an unknown concentration of Fe2+ in basic aqueous solution according to the generalized redox reaction form
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more com- plicated, but this is a reasonable ?rst approximation.)
The vapor pressure of a liquid at 25C is 200 torr. What will happen when the barometric pressure Pbar is lowered to 190 torr?
Although this compound is ordinarily found as a gas, it is reasonably soluble in water. What is the maximum concentration of dissolved hydrogen sulfide species (H2S, HS-, and S2-)that could theoretica
This means that you used moles of NaOH to titrate moles of acetic acid in the vinegar sample or grams of acetic acid. The percent mass of your sample of vinegar was %.
What is the final temperature of the water after the preceding reaction occurs? Assume tat all the heat is used to raise the temperature of the water.
Rank the following compounds in order of decreasing vapor pressure. Rank from highest to lowest vapor pressure. To rank items as equivalent, overlap them.
Assuming that the answer to part b is "Yes", at what temperature will the crystals begin to appear when the student"s solution begins to cool? If the student cooled the solution to 0o C and filtered o
The molar mass of the substance was found to be about 300g/mol. what is the molecular formula of the unknown powder? was the substance cocaine?
Choose the answer that has the following compounds correctly arranged with respect to acid catalyzed hydrolysis. Propose a mechanism for the following reaction.
Calculate the final pessure in the container when the temperature is 110 degrees C. (Assume no oxygen remains unreacted and that all products are gaseous)
A piece of metal of mass 18 g at 104?C is placed in a calorimeter containing 53.6 g of water at 21?C. The final temperature of the mixture is 72.2?C. What is the specific heat capacity of the metal?
The coefficients in a balanced chemical equation tell how many molecules, and thus how many moles, of each reactant are needed and how many molecules, and thus moles, of each product are formed.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
An automobile gasoline tank holds 47 kg of gasoline. When the gasoline burns, 165 kg of oxygen are consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxi
If 5.0 of nitrogen at 12 degree Celsius and 1.30 atm pressure reacts with the same volume of hydrogen at the same temperature and pressure, what volume of ammonia is obtained at that temperature and
How many charges will it need to travel from Boston, Massachusetts to Miami, Florida, a distance of 1486 mi, assuming that the trip begins with a full charge?
How many grams of magnesium chloride, MgCl2, would be required to prepare a 0.2019 m MgCl2 solution by combining this compound with 0.2050 L of water (assume a density of 1.00 g/mL)?