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Complete and balance the following equation Write the ionic equation and net ionic equation. Indicate spectator ions and determine if a precipatie would form. (NH4)2C03(aq)+CaCl2
Calculate the concentration of oxygen in mg/L required to completely oxidize the following organic compounds. Use 500 mg/L for the concentration of each compound.
CaH2(s) + 2H2O(l) Ca(OH)2(aq) + 2H2(g) How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
Explain the difference in the answers to question 2 and question 5. Which is the "correct" value for the concentration of the standard NaOH solution? Why?
A sample of H2SO4 contains 1.11 grams of H (1.01 g/mol). How many moles of H2SO4 (98.02 g/mol) are present?
How many grams of Hcl will be produced from the reaction of 50.0mL of a 0.300M CaCl2 according to the reaction:CaCl2 + H3PO4(aq) ----> Ca3(PO4)2 (s) + HCl (aq)
What is mass percent (%w/w) of H2SO4 in this solution? (b) Would the mass percent (%w/w) of H2SO4 change with changes in temperature? Explain.
A gas has a volume of 50.0 cm3 at a temperature of -73 C. What volume would the gas occupy at a temperature of -123 C if the pressure stays constant?
Identify which pairs of all of the stereoisomers of 2-chloro-3-methylpentane are enantiomers, diastereomers, and/or meso compounds.
In milk at 37 C, lactobacillus acidophilus has a generation time (doubling time) of about 75 minutes. Calculate the population relative to the initial value at 30,60,90 and 150 minutes
If 0.628 moles of a substance weighs 77.3 g, what is the molar mass of the substance, in units of g/mol?
What is the molarity of a NaOH solution if 28.2 mL of a 0.112 M H2SO4 solution is required to neutralize a 25.0-mL sample of the NaOH solution?
If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, how many half-lives have passed?
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