Search & Filtering
Draw the Lewis structures of the following:
1 dihydrogen sulfide
2. carbon tetraflouride
3. nitrite ion
Explain the electrophoresis mode of separation using a schematic representation
What is the percentage composition of nitrogen in one mole of ammonium nitrate?
It takes 22.53 mL of 0.1017 M NaOH solution to reach the endpoint when titrating a 25.00 mL sample of an H2SO4 solution. What is the molarity of the H2SO4 solution?
A 50.32 gram sample of iron (with a heat capacity of 0.450 J/g ºC) is heated to 100.0 ºC. It is then transferred to a coffee cup calorimeter containing 45.07 g of water (specific heat of 4.184 J/ g ºC) initially at 20.63 ºC. If the final temperature of the system is 23.59, how much heat was absorbed by the calorimeter? Record your answer as a whole number (assume the sign is positive).
How much heat (in joules) is used to heat a 39.79 gram sample of iron from 9.23 degrees Celcius to 100.00 degrees Celcius if the specific heat of Fe is 0.450 j/g*C? Record your answer to 2 decimal spaces.
How many kilojoules of energy are in a donut that contains 200.0 Calories?
Strontium chloride and sodium fluoride react to form strontium fluoride and sodium chloride, according to the reaction shown.
SrCl2(aq)+2NaF(aq)⟶SrF2(s)+2NaCl(aq)
What volume of a 0.190 M NaF solution is required to react completely with 417 mL of a 0.400 M SrCl2 solution?
How many moles of SrF2 are formed from this reaction?
A student needs to prepare 50.0 mL of a 1.30 M aqueous H2O2 solution. Calculate the volume of 5.1 M H2O2 stock solution that should be used to prepare the solution.
The pressure 80.0 m under water is 886 kPa.
What is this pressure in bar and Torr?
