Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
A car is going at a speed of 21.6 km/hr when it encounters a 12.8m long slope of angle 30 degree. The friction coefficient between the road and the tyre is 1/2*0.732. Show that no matter how hard th
Calcium reacts with oxygen to make calcium oxide, CaO. What is the maximum mass of CaO(s) in grams that could be prepared from 9.12 g of Ca(s) and 2.03 g of O2(g)?
An equilateral triangle has vertices at (0,0) and (6,0) in acoordinate plane. What are the coordinates of the third vertex? Youmay want to sketch it out.
If the student would like this investment to be worth $1,000,000 in 45 years, what annual interest rate would the account need to pay?
Estimate how many feet by assuming that the sand grains are roughly cube-shaped, each one with an edge length of 0.10 mm Texas has a land area of 268,601 square miles.
The experiment is performed with hexane. A final weight for the gas of 0.31 grams is obtained. What is the value for n to be used in the gas law calculation?
Discuss the mechanism of oscillating reactions using the Briggs-Rauscher or the Belousov-Zhabotinsky reactions as examples.
How many mmol of acetic acid (HC2H3O2) are required to react with the NaOH? If your titration solution is 0.424 M in NaOH, and the endpoint occurs at 13.50 mL of titrant.
In the northern states during winter, "salt" is sprinkled on roads to reduce the formation of ice. What chemical principles are involved in the process?
A titration is performed on 1.3245g of a sample of a diprotic acid that is dissolved in 50 ml of water. if 44.10 ml of .6124 M NaOH is required to reach the end-point, what is the molecular weight o
If the unit of measurement were changed to grams of cholesterol per milliliter of blood, what would a cholesterol reading of 185 kg/dl translate to?
Combustion of a .225g sample of a compound containing only carbon, hydgrogen and oxygen produces .306g water and .561g carbon dioxide. what is the empirical formula of the compound?
Ammonia rapidly reacts with HCl producing ammonium chloride. Calculate the number of grams of excess reactant when 7.5g NH3 reacts with 4.3g of HCl.
The filter used originally weighed 0.4327 grams. After the sample was filtered and dried at 103C to 105C, the filter was weighed again at 0.4396 grams. Calculate the TSS of the sample.
Some diamonds appear yellow because they contain nitrogen compounds that absorb purple light of frequency 7.46 10^14 Hz. Calculate the wavelength (in nm) of the absorbed light.
Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7
One metric tonne(t) equals 1000kg. What is the amount of sulfur dioxide produced by a power plant that burns 7.5 million metric tonnes(t) of coal over a year? Assume that the coal is 2.4% sulfur
Assume that you are a chemical engineer attempting to optimize the process CO(g) + 2H2(g) (right arrow) CH3OH(g), what conditions would you use? Explain purpose of each factor by applying Le Chai
The half life of an isotope is 3.15 x 104 years. How many hours will it take for a 4.92 g sample to decay until 1.81 g of the isotope remains? Remember - that there are actually 365.25 days in a yea
The end position of the arm must be deteermined accurately in order to weld the components at the precise position. a) In selecting the material for the arm of such robots, what factors must be c
A 0.0125-g sample of a gas with an empirical formula of CHF2 is placed in a 165-mL flask. It has a pressure of 13.7 mm Hg at 22.5 ?C. What is the molecular formula of the compound?
When chemists are preparing dilute acid solutions in water they follow the proverb "Always add acid" Explain why this is a good idea. What would happen if the water is added to the acid?
The Henry's Law constant KH for O2 in water at 20 degrees C is 1.28 x 10-3 mol L-1atm-1. How many grams of O2 will dissolve in 2.0 L of H2O that is in contact with pure O2 at 1 atm?
A 5.05g sample of a copper substance was heated in air and 6.32g of copper II oxide was formed. what was the formula of the orginal copper substance?
In an experiment, 6.00 g of Mg(s) was reacted completely with O2(g) to form MgO(s) and 148.5 kJ of heat was evolved. What is the molar enthalpy in kJ/mol of formation of MgO(s)?