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A certain carbon-hydrogen compound contains 84.1% C by mass and the remainder is hydrogen. What is the empirical formula of the compound?
A. C4H10
B. C4H9
C. C3H4
D. C3H6
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.5 cm. Its mass is 1.2 kg. Calculate the density of the metal.
A 0.3459 g tablet that contains bicarbonate generates 1.24 x 10?3 moles of CO2. What is the percent bicarbonate in the tablet? Bicarbonate is 61.0138 g/mol.
Illustrate (draw) the thermodynamic cycles for the acid dissociation of both HCl and HF. Classify each cycle as exergonic or endergonic. Do your calculated values agree with the observed strengths of each acid in water?
calculate the concentration of an NaOH solution if 25.0ml of the solution is needed to neutralize 17.5ml of a 0.419M HCL solution
A graduated cylinder contains 31.0 of water. What is the new water level after 38.0 of silver metal is submerged in the water?
Does pH have an effect on the cell potential (Ecell) for the following oxidation-reduction reaction? 5Fe^2+(aq) + MnO4^-(aq) + 8H^+(aq) ---> 5Fe^3+(aq) + Mn^2+(aq) + 4H20(l)
osmium has a density of 22.6 g/cm3. what volume (in mL) would be occupied by a 21.8 g sample of osmium?
When 5.0 g of an unknown compound is dissolved in 200.0 g of carbon tetrachloride, CCl4, the freezing point of the solution is -31.8 degC. The freezing point of pure carbon tetrachloride is -22.3degC
If 25 ml of solution A is needed to make a 0.7 liters with a final concentration of 1.5%, what was the concentration percentage of the stock solution
If a diagnostic test starts with 15mCi of Ga-68, how much is left after the test if the test runs for 2 hr and 15 minutes?
Calculate the amount of heat energy required to convert 55.0 g of water at 62.5 degrees Celsius to steam at 124.0 degrees Celsius
What are the steps to recrystallize an impure solid? Answer 1. Heating the water. 2. Dissolving the solute.3. Letting the solute cool.4. Collecting and washing the crystals.
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