J.R. S.

f I know the amount of dissolved oxygen in such a solution, how can I know the required concentration of sodium sulfite to be used and react as oxygen scavenger?

Please answer these equations and show how you got the answer! Thanks! 1. (209.6J/K) = [2mol(213.74 J/molK) + 6mol(S (188.825 J/molK)] – [1mol(219.56 J/molK) + 3mol(x)] 2. ?Grxn = [12mol(-394.359... more

A student measured out a 15.0 mL aliquot (portion) of juice into an Erlenmeyer flask. She added 3 drops of Phenolphtalein indicator to the solution. It took 27.30 mL of 0.1003 M NaOH to reach the... more

A block of aluminum with a volume of 99.0cm3 absorbs 65.2J of heat.  (density of aluminum =2.70 g/cm3)

Use the equation below to answer the following questions. Ba + ZnSO4 BaSO4 + Zn   a. Determine the oxidation state of the atoms in the equation's reactants and products: (6 points)   Oxidation... more

PRESSURE HELP!The vapor pressure of liquid iodomethane, CH3I, is 100. mm Hg at 266 K. A 0.541 g sample of liquid CH3I is placed in a closed, evacuated 490. mL container at a temperature of 266... more

Frank and Linda just finished a meal and received their bill for $47.60. They would like to leave their server a 20 percent tip. Which expression could be used to find the total bill including... more

Thew title of this topic in Chemistry is "Graham's Law of Diffusion." It's entirely okay if you'll provide your own datas/numbers, cuz' I'm only concerned with the solution on how to solve these.... more

Demochares has lived one-fourth of his life as a boy, one-fifth as a youth, one-third as a man, and has spent thirteen years in his dotage. How old is the gentleman?

I don't understand at all

please explain the answer

ow do you find the formula of a hydrate when given an impure substance? Is there any procedure to find this out in a laboratory setting?

How do I start this problem?