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A sample of liquidmercury is heated with an electrical coil. If 37.9 Joules of energy are added to a 14.3 gram sample and the final temperature is 39.7°C, what is the initial temperature of the mercury?
the mass spectrum determined the molecular weight of mehtyl salicylate to be 125.15 g/mol. What is the molecular formula of methyl salicylate?
How many milliliters (to two decimal places) of a 0.919 M H2SO4 solution must be used to make 300.0 mL of a 0.100 M H2SO4 solution
The helium thus produced was collected for 1 year; at the end of the year, the total volume of helium gas was found to be 0.237mL at 27? C and 152.0 torr. Calculate Avogadro's number from these data.
Calculate the energy in joules of a 7.46 g object moving at a speed of 713 m/s. Enter in Scientific notation. Also determine how much greater the electrostatic energy is between charges
Problem- Calculate the equilibrium concentrations of all species in the formation of [Ag(NH3)2]^+ when 15.0 mL of 0.100 M AgNO3 is mixed with 5.00 mL of 0.200 M NH3. Kf is 1.7x10^7.
The density of an unknown element in the gaseous state is 1.60 g/L at300 K and 1 atm. Which of the following could be the element
what is the molarity of a solution when 2.25g NaF is dissolved in enough water to make 250mL of solution
Calculate the vapor pressure of water, in torr, above a solution prepared by dissolving 62.60 g of ZnCl2 in 429.0 g of water at 328.0 K. The vapor pressure of pure water at 328.0 K is 118.0 torr.
Concentrated stock HCl has a molecular weight of 36.46 and contains 32g of salt for every 100g of acid (termed as 32% w/w). To prepare molar solutions %w/w must be converted into %w/v by considering the density of stock HCl which is 1.16.
Calculate the total pressure (in atm) in the tank at 25°C. First need to calculate the number of moles of each gas added.
Two students are debating whether methanol, CH3OH(l), or propanol, C3H7OH(l), is the better fuel. One student states that methanol produces more heat than an equal mass of propanol.
Also, determine the constant volume and constant-pressure specific heats of the gas if its specific heat ratio is 1.667.
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