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How many moles of NaOH (FW= 40g/mol) are there in 2.0 grams NaOH?
How many dilutions are needed in using a 25 mL volumetric pipet and 100 mL volumetric flask for each dilution to prepare a 100 mL solution with final concentration of 0.00293 M from 12 M HCl? Illustrate this serial dilution by drawing the glasswares and put labels, arrows, etc.
The specific heat of aluminum is 0.902j/g.°C.How much heat is absorbed by an aluminum pie tin with a mass of 473g to raise its temperature from room temperature (23.00°C)to oven temperature(375°F
Using the solubility guidelines, determine which aqueous solution below will react to form a solid in an exchange (metathesis) reaction with lithium chloride, LiCl?
Calculate the number of milliliters of 0.618 M KOH required to precipitate all of the Cr3+ ions in 194 mL of 0.621 M CrCl3 solution as Cr(OH)3. The equation for the reaction is:
CrCl3(aq) + 3KOH(aq) Cr(OH)3(s) + 3KCl(aq)
Calculate the number of milliliters of 0.673 M Ba(OH)2 required to precipitate all of the Al3+ ions in 111 mL of 0.662 M Al(NO3)3 solution as Al(OH)3. The equation for the reaction is:
2Al(NO3)3(aq) + 3Ba(OH)2(aq) 2Al(OH)3(s) + 3Ba(NO3)2(aq)
A sample of helium gas occupies a volume of 8.89 L at 59.0°C and 1.26 atm.
If it is desired to increase the volume of the gas sample to 10.5 L, while increasing its pressure to 1.54 atm, the temperature of the gas sample at the new volume and pressure must be
°C.
A sample of nitrogen gas has a volume of 3.76 L at 27°C. What volume will it occupy at 270. K if the pressure and number of mol are constant? Enter your answer in the provided box.
A sample of argon gas occupies a volume of 8.89 L at 49.0°C and 0.600 atm.
If it is desired to decrease the volume of the gas sample to 5.95 L, while increasing its pressure to 0.763 atm, the temperature of the gas sample at the new volume and pressure must be what in degrees celsius?
