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How many protons and electrons are needed to make an atom neutral? What about the number of neutrons? How many protons and electrons are needed to make an ion of charge +1?
when a metal at a higher temperature is transferred to water at a lower temperature heat is inevitably lost to the
Coal as fired, contains 2.5% moisture. On the dry basis the coal analysis is as follows: carbon -80%, hydrogen- 6%, oxygen-8%, ash- 6%. The flue gas analysis.
What is the pH of a buffer that results when .60mol NaF is mixed with 100ml of 2.0M HCl and diluted with water to a final volume of 250 ml? (Ka of HF=7.2e-4)
For each of the following reactions, balance reaction, determine the number of electrons transferred in the reaction, and write the equilibrium constant
Presume 12.0 g of carbon (C) reacts with 73.0g of sulfur (S) to give 76.0 g of the compound carbon disulfide (CS2). In the process, all the carbon gets used up however some elemental sulfur is left over.
what would be the payload if helium were used instead of hydrogen?, d.) would you and a companion on board, the balloon ascends to 30,000 feet where pressure is 0.28 atm. Assume no volume change, what is the temp (in celsius) at 30,000 feet?
A particular element M has a heat capacity of 0.36 JgK and it forms an oxide that contains 2.9 grams of M per gram of oxygen What is the molar mass of the metal
Write the chemical equation for the formation of CH from H and C atoms. Lone pairs do not need to be included. Then Using the table of bond energies determine the ?H for the above reaction.
If a graduated cylinder contains 155 g of water a 11.0 g piece of iron (density = 7.86 g/cm3) and a 16.0 g piece of lead are added. Explain what is the new water level in the cylinder
an aqueous solution of a nonelectrolyte boils at 100.32c. what is its expected freezing
Calculate OH- of each aqueous solution using the following H3o+ a. 1.0 X 10-7m in OH- b.1.0 x 10-5 in OH-
The absorbance at 340 nm was 0.427 in a 1.000 cm cuvet. The molar absorptivity for this compound at 340 nm is = 6130 M-1 cm-1. Calculate the concentration of compound in the cuvet
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