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A sample of concrete contains cement, gravel, crushed rocks, sand, and water. Each of these contains different metals and minerals and hence has different colors and different properties. Which term or terms could be used to describe this sample of concrete?
Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g..
a toothpaste contains 0.24% by mass sodium fluoride to prevent dental cavaties. One tube contains 119g of toothpaste. How many moles of NaF are in the tube of toothpaste.
What is the value of the rate constant. What is the reaction rate when the concentration of NO2(g) is 0.842 M and that of O3(g) is 1.82 M if the temperature is the same as that used to obtain the data shown above
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR
The surroundings are at 285 K. The gas may be assumed to be ideal. Calculate the entropy change for the system, the surroundings, and the universe when the gas increases in volume by a factor of four in each of the following processes
considering the given equationcuscn kio3 hcl rarr cuso4 kcl hcn icl h2o balance the equation using the smallest
What is the empirical formula of a hydrocarbon that is 92.3% C and 7.69% H. Given the molar mass is 78.0 g/mol, what is the molecular formula of the hydrocarbon
What is H in kJ for the process of freezing a 39.2 g sample of liquid antimony at its normal melting point of 631oC. is it positive or negative
Carry out the following mathematical operations, and give each result with the correct number of significant figures. (1.05 x10-3)/ (6.135 )
What percentage of the original Ag+ remains in solution when 180 mL 2.10×10-2 M AgNO3 is added to 240 mL 3.76×10-2 M K2CrO4 ?
Write out a detailed procedure for determining the enthalpy of reaction between citric acid (H3Cit) and sodium hydroxide (NaOH). Note that the neutralization reaction is
The Reaction of Ba(OH)2+2HCl=BaCl2+2H2O it requires 12.01mL of .03582 M HCl to react with 25.00ml of Ba(OH)2 solution calculate the concentration of the Ba(OH)
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