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A sample may contain any or all of the following ions: Hg22+, Ba2+, and Mn2+. No precipitate formed when a solution of NaCl or Na2SO4 was added to the sample solution. A precipitate formed when the sample solution was made basic with NaOH. Which ion (or ions) are present in the sample solution? Explain.
Write the net ionic reaction for the precipitate.
What is the volume of 0.750 M KCl(aq) that can be prepared from 125.0 g KCl(s)? The volume is ___x10^____ L
Choose all of the processes from below which describe changes which are independent of the path by which the change occurs. the elevation increase experienced by a traveller travelling from Grand Isle, LA to Denver, Colorado
The calorimeter and water absorb 21.9 kJ of heat. How much heat is given off when one mole of salicylic acid burns
What is the pH of a buffer solution prepared from 5.15g of NH4NO3 and 0.10L of 0.15M NH3? What is the new pH if the solution is diluted with pure water to a volume of 500mL
Calculate the bp of a 10% aqueous sodium chloride solution. Assume this is an ideal solution. Kb (water) = .520 C/m: the molar mass of NaCl is 58.5g. Pure water boils at 100.00 C
Calculate the pH of this solution. When 0.20 mol of H+ ions is added to the solution what is the pH (assuming volume change is negligible)
Which of the following solvents would be good to use for 1H NMR analyses? (Check all that apply) acetone-d6 chloroform-d dimethyl sulfoxide deuterium oxide acetone
Why are the melting points of sodium halides very high and the melting points of silicon halides very low. Response should include descriptions of the bonding and refernce to the attractive forces that must be overcome in the two types of compound..
A sample of nitrogen gas occupies 1.55 L at 27.0 degrees Celsius and 1.00atm. What will the volume be at -100.0 degrees Celsius and the same pressure?
Calcium in a mineral was analyzed five times by each of two methods. Are the mean values significantly different at the 95% confidence level? Method1: 0.0271 0.0282 0.0279 0.0271 0.0275 Method2: 0.0271 0.0268 0.0263 0.0274 0.0269 Chemistry
A copper wire (density = 8.96 g/cm3) has a diameter of 0.26 mm. If a sample of this copper wire has a mass of 43 g, how long is the wire?
How many air molecules are in a 12.5x12.0x10 room? Assume atmospheric pressure of 1.00 , a room temperature of 20.0 , and ideal behavior. Volume conversion:There are 28.2 liters in one cubic foot.
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