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12.755g of a metal initially at 99.0C are placed into 75.0g of water initially at 2.30C. The final temperature of the water is 24.5C. Calculate the specific heat of the metal. The specific heat of water is 4.184J/g.C
solution. Assume that the density of solution is 1.12 g/mL
NH3 + O2 —> NO2 + H2O
3.)How many mL of ethyl alcohol can be distilled from 1.5 L of a 90 proof wine?
4.)58.8 g H2SO4 (MM = 98 g/mol) is added to H2O to make a 500 mL solution. If the density of the solution is 1.2 g/mL, calculate the (a) M; (b) m.
5.)How many grams of CaCL2 (MM = 110 g/mol) should be dissolved in H2O to prepare a liter of 1.2M solution?
6.)How many mL of 6M HCl solution should be diluted to make 200 mL of a 1.5M solution?
7.)To what volume must 30 mL of a 2.5M NaOH solution be diluted to make a 0.4M solution?
100 mL of ether was divided into two portions of 50 mL each and two extraction was performed. How much A will be extracted after two extraction of 50 mL each.
If a Boeing 767 aircraft, requires 49163 lb of fuel to make the trip from Toronto to Edmonton, and already has 8000 L of fuel in the tank, how many litres of fuel need to be added to ensure sufficient fuel? The density of the fuel is 0.8 kg / L
Ammonium perchlorate NH
4
ClO
4
is the solid rocket fuel used by the U.S. Space Shuttle. It reacts with itself to produce nitrogen gas N
2
, chlorine gas Cl
2
, oxygen gas O
2
, water H
2
O
, and a great deal of energy.
What mass of chlorine gas is produced by the reaction of
7.59
g
of ammonium perchlorate?
1.)A 100 mL solution contains 4.7g MgCl2 (MM = 94 g/mol). The density of the solution is 1.03 g/mL. Express the concentration in (a) % by mass or mass %; (b) M
2.)How many grams of glycerine, C3H5(OH) (MM = 92 g/mol) is mixed with 36 g H2O to make a solution where the mol fraction of glycerine is 0.2?
3.)How many mL of ethyl alcohol can be distilled from 1.5 L of a 90 proof wine?
4.)58.8 g H2SO4 (MM = 98 g/mol) is added to H2O to make a 500 mL solution. If the density of the solution is 1.2 g/mL, calculate the (a) M; (b) m.
5.)How many grams of CaCL2 (MM = 110 g/mol) should be dissolved in H2O to prepare a liter of 1.2M solution?
6.)How many mL of 6M HCl solution should be diluted to make 200 mL of a 1.5M solution?
7.)To what volume must 30 mL of a 2.5M NaOH solution be diluted to make a 0.4M solution?
A 20 mM solution of ethanol is diluted 1 in 8. The diluted ethanol solution was used for an alcoholdehydrogenase assay that had a total volume of 1.5 mL. 20 μL of alcoholdehydrogenase was used for the assay. The reaction was followed spectrophotometrically and a progress curve plotted from the spectrophotometric data. Using the progress curve, the initial velocity was calculated as 0.30 ΔA/min.
The assay was repeated as above, with a different volume of alcoholdehydrogenase . The initial velocity was 0.01 ΔA/s. What volume (in μL) of alcoholdehydrogenase was used for the assay?
A 5 mM substrate is diluted 1 in 5. 2.95 mL of the diluted substrate is assayed in a cuvette with .05 mL of enzyme. What is the concentration of substrate in the cuvette (in mmol/L)?
