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A balloon is filled with hydrogen gas and produces the following chemical reaction between iron and sulfuric acid: Fe(s) + H2SO4(aq) --> FeSO4 (aq) + H2(g). The total mass that can be lifted by a balloon is equal to the difference between the mass of gas in the balloon and the mass of air displaced by the balloon. How much mass could be lifted by the balloon stated above? What if the same balloon was filled with helium instead?
The solubility of strontium fluoride (SrF2) in water is 111.5 mg/L. What is Ksp for strontium fluoride (molar mass = 125.62 g)?
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 870 mL at 40C and a barometric pressure of 755 torr.
How many grams of sodium ion Na+ are in 2.50 g toothpaste. A toothpaste contains 0.24 by mass sodium fluoride used to prevent dental caries and 0.30 by mass triclosan , a preservative and antigingivitis agent
What will happen if a small amount of sodium hydroxide is added to a 0.1 M solution of ammonia. a) Kb for ammonia will increase b) Kb for ammonia will decrease
Aluminum is a lightweight metal (density=2.70 g/cm^3) used in aircraft construction, beverage cans, and foils. a) What is its density in kg/m^3? b) How many pounds would an aluminum clock measuring 1.0 m x 2.0 m x 1.5 m weigh
Please draw a detailed, arrow-pushing mechanism for the addition of HBr to trans-2-butene. 4. Please draw a potential energy diagram for this reaction
How much heat (in J) is evolved or absorbed when a 36.9 g sample of water (specific heat = 4.18 J/(g K)) cools from 87.7oC to 79.2oC
Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 3.80 g of sodium carbonate is mixed with one containing 5.43 of silver nitrate.
Air is mostly nitrogen and oxygen. Determine the rms speed of nitrogen and oxygen at room temperature (20° C).
Consider a liquid with a vapor pressure of 320. torr at 20.0 degrees C and a vapor pressure of 540. torr at 50.0 degress C. What is the normal boiling point of this liquid?
Electrophilic Substitution, Which compound is more reactive toward electrophilic substitution (e.g., nitration)? Explain you reasoning.
Copper metal and zinc metal react differently in the presence of certain acids. For example, while both react with concentrated nitric acid and dissolve completely, only zinc reacts and dissolves in dilute hydrochloric acid.
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