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2.20 grams of chromium reacts with excess oxygen to give 3.22 grams of a chromium oxide. What is the name and formula of the chromium oxide? Write a balanced equation for the reaction
when zinc metal is placed into a copper (II) nitrate solution, a single-displacement reaction occurs. Write a balanced equation to describe this reaction.
Calculate the pKa value of the acid and determine the number of moles of acid initially present. b) When the reaction is complete, what is the concentration ratio of conjugate base to acid
Calculate the pH for an aqueous solution of acetic acid that contains 2.15x10^-3M hydronium ion.
what is the molarity of a solution prepared by combining 125mL of 0.251 molar HCl with 250mL of pure water
the solubility product constant for mgf2 is 6.4 times 10-9. how many grams of mgf2 will dissolve in 150 ml of h2o at
If the pressure exerted by ozone, in the stratosphere is 3.0*10^-3 atm and the temperature is 253 K, how many ozone molecules are in a liter?
What are some factors to help you determine the relative strength of a base. For example, how would you know that NH2- is a very strong base. Or that OH- is a weaker base than NH2- And that CN- is a relatively weak base
how many grams of gold would plate on the metal used for the medallion? Explain what you are thinking as you show your calculations.
a mole of n-hexane is confined in a volume of 0.500L at 600 K. What will be the pressure according to a) the ideal gas law and b) the van der Waals equation
a. A 0.1044 gram sample of an unknown monoprotic acid required 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
how many grams of sulfuric acid are produced?
How much of the solution is needed?
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