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Calculate the minimum number of grams of that must be combusted to provide the energy necessary to convert 2.50kg of from its solid form at -14.0 C to its liquid form at 60.0 C .
a compound is composed of only C.H and O. the combustion of a 0.519-g sample of the compound yields 1.24g of CO2 and 0.255g of H2O.
how many grams of CaCl 2 would be required to produce a 3.5 M(molar) solution with a volume of 2.0 L?
Determine What is the percent by mass of sodium phosphate in a 0.142M Na 3 PO 4 (aq) solution? If it is given that it has a density =1.015g/mol.
The Ksp for Al(OH)3 is 2 x 10-32. At what pH will a 0.2 M Al3+ solution begin to show precipitation of Al(OH)3.
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
If a 2.5 L reaction vessel initially contains 725 torr of cyclopropane at 485C , how long will it take for the partial pressure of cylclopropane to drop to below 105 torr?
Evaluate the electronic configuration for ionization energies of Magnesium, the orbital number in which the electrons are added in phosphorus ion, and the one will lose in the ionization of Alluminium.
Carbonate buffers are significant in regulating PH of blood at 7.40. Calculate the concentration of Carbon dioxide in a 0.200M NaHCO3 at PH=7.40.
What mass of melamine will be obtained from 168 kg of urea if the yield of the overall reaction is 79.0%
A compound contains 43.64% P with the remainder being oxygen. What is the empirical formula of the compound?
A water pipe fills a container that measures 189 cm , 307 cm ,272 cm in 97 seconds, What is the rate of flow in the pipe in liters per minute.
Mercury-205 has how many protons, neutrons, electrons, and electrons in the 1st quantum shell and in the compound BCl3 which is the more electronegative element?
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