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You have to prepare a pH 3.45 buffer, and you have the following 0.10 M solutions available: HCOOH and HCOONa How many milliliters of HCOOH and HCOONa would you use to make approximately a liter of the buffer?
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 1817 nm and the second at 97.20 nm, to return to the ground state (n=1).
The reaction between white phosphorous and oxygen produces solid tetra phosphorus decoxide (P 4 O 10 ).
The minimum energy required to break an oxygen-oxygen bond in ozone (O3) is 387 kJ/mole. What is the longest wavelength of light
When 17 mL of a solution containing .29 M Ca(OH)2 is diluted to 30 mL, a dilute solution is formed. What is the OH- concentration in 5 mL of the dilute solution?
What is the rate constant of a first-order reaction that takes 343 seconds for the reactant concentration to drop to half of its initial value?
If this energy were used to vaporize water at 100 degrees C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
the volume of a gas is 93 mL when the temperature is 91C. If the temperature is reduced to 5C without changing the pressure, what is the new volume of the gas?
When 25mL of a 120mL stock solution containing 2M AlCl3 is diluted to 80mL, how many moles of Al3+ are in the new solution.
If a 180 mg piece of gold (density =19.32 ) is hammered into a sheet measuring 2.41.0 , what is the average thickness of the sheet in meters.
At atmospheric sample is composed of nitrogen, oxygen, argon, water vapor, and trace other gases. If the partial pressure of nitrogen is 577 mmHg, oxygen is 148 mmHg, water vapor is 20 mmHg and argon is 7 mmHg, what is the observed barometric pres..
A 4.50-g sample of liquid water at 25.0 C is heated by the addition of 133 J of energy. The final temperature of the water is __________ °C. The specific heat capacity of liquid water is 4.18 J/gK.
What is the new boiling point point of water if you add 188 grams of magnesium chloride to 1250 g of water.
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