0.15g Mg reacted with 50ml 1M HCL in a calorimeter: The
calorimeter constant is 9.3
Mg (s) + 2HCL (aq) ---> Mg2+ (aq) + 2Cl- (aq) + H2 (g)
Mass of the empty calorimeter (g)
18.600g
Initial temperature of the calorimeter (°C)
21.5 C
Maximum temperature in the calorimeter from the reaction
(°C)
34.5C
Calculate delta T by subtracting (b) from (c) (°C) delta T =
Tmaximum - Tinitial
13.0C
Mass of the calorimeter and its contents after the reaction...
if 45.55ml of 0.0105M EDTA solution was needed to
titrate the Mg in a 0.2600g sample of the mineral hydromagnesite,
3MgCO3Mg (OH)2• 3H2O (365.3 g/mol), what was the weight percent of
hydromagnesite in the sample? what was the weight percent ofMg+2 in
the sample.
A solution consists of 35 ppm of benzene. The density of the
solution is 1.00g/mL. How many grams of benzene are in 1 g of
solution? How many grams of benzene are in 1.0 L of the solution?
What is the mass percentage of benzene in the solution? Please show
calculations!
A) Calculate the concentration in ppm and the molarity of Cd in
a 2.00 mL sample which has been shown to contain 16.4 μg Cd. Assume
the sample has a density of 1.00 g/mL.
The molarity of Lit of a solution that contains 65.5
ppm of Li2CO3 MW = 73.9 g / mol Select one: O a. 5.65X10-3 O b.
1.77X10-3 O c. 8.86X10-4 O d. 9.05X10-4 O e. 7.39X10-3
The following results were obtained in the replicate
analysis of lead content in water: 0.752, 0.756, 0.752, 0.751, and
0.760 ppm. If the standard deviation is 0.004 ppm, the confidence
limits at 95% level is t = 2.02 at degree of freedom 5, and...
A solution consisting of 221 mg of dopamine in 52mL of a
solution is administered at a rate of 16 mL/hr. dopamine. If a
patient is prescribed to receive 408 mg of dopamine, how long
should the infusion last? the flow rate in mg of dopamine 68 is
mg/hr