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Calculate the molarity of a solution prepared by dissolving 78.6g of KF in enough water to produce 225ml of solution. (at mass of F= 19g/mol, K= 39.10g/mol
If 5 grams of nitrogen is oxidized in air, then what is the empirical formula of compound, if it's mass is 19.3 grams?
Metal X will displace ions of Metal Y from soloution, but not those of metal Z. Metal W displaces ions of metal Z from soloution.
What is the order of these metals in the activity series?
Which pair of metals would you use to give the highest reading in a cell?
What is the order of these metals in the activity series?
Which pair of metals would you use to give the highest reading in a cell?
Suppose that 3.50 g of solid potassium chromate is added to 75.0 mL and 0.250 M Mg(NO3)2(aq).
a) What is the initial molarity of potassium chromate in the solution? b) What mass of potassium
is present in solution? Write the formula for the precipitate that forms. Assume a final volume
of 75.0 mL.
a) What is the initial molarity of potassium chromate in the solution? b) What mass of potassium
is present in solution? Write the formula for the precipitate that forms. Assume a final volume
of 75.0 mL.
&
9. & Which statement is incorrect?
& & & A. & One mole contains 6.02 1023 molecules.
& & & B. & One molar mass equals one mole.
& & & C. & One mole equals 6.02 1023 g of a compound.
& & & D. & One mole of water contains the same number of molecules as one mole of carbon & & & & & & & & & & & & &
& & & & & & dioxide.
9. & Which statement is incorrect?
& & & A. & One mole contains 6.02 1023 molecules.
& & & B. & One molar mass equals one mole.
& & & C. & One mole equals 6.02 1023 g of a compound.
& & & D. & One mole of water contains the same number of molecules as one mole of carbon & & & & & & & & & & & & &
& & & & & & dioxide.
How many moles of silver atoms are in 1.8 * 10^20 atoms of silver?
How many moles of HCl could be formed from 5.48 moles of PCl3 and 7.44 moles of water in the following reaction?
1.2g of Silver was roasted in air to form silver 1.289g of silver oxide. Find the Empirical formula for the silver oxide formed.
a quantity of 4^2 ml of 0.600 M HNO3 is mixed with 4^2 ml of 0.300 M Ba(OH)2 in a constant pressure calorimeter of negligible capacity. the initial temperature of the solution is 18.46oC. What is the final temperature of the solution?
Calculate the amount (in mole) of:
Cl- ions in 13.4g of nickel chloride (NiCl2)
Cl- ions in 13.4g of nickel chloride (NiCl2)
