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Compute the change in energy necessary in making 55.0 mL of water from its elements under standard conditions.
The chemical equation for the formation of water is -H2(g) + 1/2 O2(g) --> H2O(l)
The chemical equation for the vaporization of water is- H2O(l) --> H2O(g)
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as After many years, rebar will begin to corrode, and the concrete will weaken. Studies are ongoing regarding the best metal to be a sacrificial anode ..
How many moles and number of ions of each type are present in the following aqueous solution. 471 ml of 0.21g aluminum sulfate/L
A typical cup of tea is made by starting with six fluid ounces of cold water (177 mL). How much heat (in joules) is required to heat this amount of water from 17.7 oC to 87.8 oC, a good temperature for brewing geen tea
Calculate the molarity of the solution at the limit of detection if the molecular weight of THC is 315 g/mol
Tums is an example of an antacid that contains calcium carbonate , caco3. consider the reaction between this basic material and HCI. how many moles of HCI do you need to neutralize
find the empirical formula for the ion mnxo-y using this experimental info the reaction below takes place in a 608 ml
What mass of silver chloride will be recovered if excess sodium chloride is added to 500 mL of solution containing 10.79g of Ag+?
what volume of 0.50 m sodium hydroxide is needed to titrate 150 ml of 0.33 m hydrocyanic acid hcn to the equivalence
What is the maximum number of electrons that can be identified with each of the following sets of quantum numbers? In some cases, the answer may be "none."
calculate how many moles of the product form when 0.040mol of K completely reacts. Assume that there is more than enough of the other reactant. 4K(s)+O2(g)?2K2O(s)
Part A What is the reaction that corresponds to the first ionization energy of rubidium, Rb ? Part B What is the reaction that corresponds to the electron affinity of iodine, I
A large cylinder of helium filled at 2000 lb/in^2 had a small orifice through which helium escaped into a space at the rate of 6.4 mmol/hour. How long would it take for 10 mmol of CO toleak through a similar orifice at the same pressure
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