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A ball is thrown horizontally from the top of a building 19.0 m high and lands 63.7 m from base of the building. With what intial speed was the ball thrown?
Determine which metal will reach the lowest temperature If the same amount of heat is added to both the metals?
Calculate the amount of heat required to heat a 3.6 kg gold bar from 25 C to 64 C. Specific heat capacity of gold is 0.128 j/g C.
Consider the following balanced equation: 2 N2O5 → 4 NO2 + O2. If a 5.00 g sample of N2O5 undergoes this reaction, how many grams of O2 will also be formed?
A beaker contains 0.964 grams of nitrogen. How many moles of molecular nitrogen does the beaker contain?
toothpaste contains 0.24% by mass sodium flouride used to prevent dental cavities. One tube contains 119g of toothpaste. How many moles of NaF are in the tube?
What is the pH of the buffer that results when 11 g of NaCH3CO2 is mixed with 85 mL of 1.0 M CH3CO2H and diluted with water to 1.0 L? (Ka of CH3CO2H = 1.8 ´ 10-5)
potassium permanganate was used to determine the percentage of iron (Fe, At weight: 55.845? in an ore sample. the procedure included dissolving the iron wiht HCl and then converting all the iron in the ore to Fe2+ using several reagents.
The equalibrium constant for the reaction AgBr(s) Ag^+(aq)+Br^-(aq) is the solubility product constant, Ksp=7.7x10^-13 at 25 degrees C. Calculate deltaG for the reaction
if 489 mg gas occupies 249 mL at 80 degrees celcius and 745 mmHg of pressure, what is the molar mass of the gas.
How many molecules of acetylene (HCCH) react with 146 molecules of oxygen to produce carbon dioxide and water?
In combustion analysis, 2.00mg of vitamin C yielded 3.00mg CO2 and 0.816mg H2o. From mass spectrometry, it was found that the molecular weight of vitamin C is 176amu. Determine the mass composition of vitamin C, its empirical formula, and its molecul..
Assuming the final concentration of chloride anion after the addition of hcl (precipitation step) was 0.1M what is the remaining concentration of Ag in the solution
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