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Determine the density in g/mL of a 0.70 g sample of oxygen gas that occupies 5.0L. Compare the density of oxygen gas to the density of water, assuming both substances are at STP.
Which solution will be a better buffer at pH 4.74? a. 0.5 M acetic acid + 0.5M sodium acetate b. 0.1 M acetic acid + 0.1 M sodium acetate
the element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. what is the percent
Table salt (NaCl) and sugar (C12H22O11) are accidentally mixed A 5.00g sample is burned and 2.20-g of CO2 are produced. What is the mass percentage of the table salt in the mixture.
in a coffee cup calorimeter 50.0 ml of 1.0 m naoh and 50 ml of 1.0 m hcl are mixed. both solutions are originally at
Calculate the volume of O2 at STP, required for the complete combustion of 175 g octane (C8H18) to CO2 and H2O?
For one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 3.
One of the students in lab decided to use two fractionating columns (one on top of the other) instead of just one. How would this: a) affect the separation between hexane and heptane?
Briefly explain how the calculated molar mass of HCL would be affected if the HCL-saturated cotton ball were placed in the tube the NH3-satureted cotton ball
You dissolve 261 mmol of sodium bicarbonate into a total volume of 1.2 L. What is the molarity of sodium bicarbonate in this solution?
Claisen reactions use a stoichiometric amount of base and do not polymerize, unlike aldol reactions that use a catalytic amount of base and can polymerize.
A system at equilibrium contains I2(g) at a pressure of 0.16 atm and I(g) at a pressure of 0.20 atm. The system is then compressed to half its volume
How many PopTarts® are needed to convert 1,000.0 g of water at 20.0 oC to steam at 100.0 oC? One PopTart is equal to 800,000 J of energy
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