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Mass of empty container = 54.54 g
Mass of container and sample of slush = 160.65 g
Then the water is evaporated from the solution and determine the mass of the residue to be 3.90 g. What is the percent by mass of CaCl2 in the slush that was collected?
A nitric acid solution is labelled 6.0 % W/W nitric acid by mass. What mass in kg, of pure solute in 3.63 kg of nitric acid?
For each reaction below, (a) identify the oxidation states of the atoms and (b) identify the oxidant, reductant, species oxidized, and species reduced. Also, think about this
Question- In the video CIA Demonstration: Natural Acid-Base Indicators, red cabbage was demonstrated as a natural indicator, and the hydrangea flower was also mentioned.
The vapor pressure of water at 25deg C is 23.8 torr. Determine the mass of glucose (MolarMass=180g/mol) needed to add 500g of water to change the vapor pressure to 23.3 torr.
At equilibrium, it is found that .25 moles of COCl2 remain. What is the equilibrium concentration of CO?
Specific rotation of α and β -D-glucose - Determine the percentage of each anomer at equilibrium.
This experiment would have been more informative if errors in the experiment did not occur in both trials. The mass percentages calculated in both trials are far off from each other.
Understanding of Chemistry basics - explain a situation that violates the second law of thermodynamics?
How many grams of dry NH_4Cl need to be added to 2.10 L of a 0.100 it M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.84? K_b for ammonia is 1.8 * 10^{-5}
Problem- What is the wave length of a radio signal from an AM radio station operationg at a frequency of 820 kHz
Which satisfy the octet rule and which do not? PS3, SO2, SO3, NO3-1, CO3-2, PCl5
To the solution 5 mL of 0.8 M HNO3 is added. What is the pH of the resulting solution? Ka for acetic acid is 1.8 × 10-5.
Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32 P, how many grams will remain after 112 days?
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