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Magnesium has a 2+ charge: Mg2+. In combination with the nitrate ion, it forms the compound Mg(NO3)2.
(a) What is the charge on the nitrate ion?
(b) What is the charge on a potassium ion if it forms the compound KNO3?
The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.300 M NaOH. B. What was the initial concentration of HCl?
ow many milliliters of 0.200 M NaOH will be required to titrate 8 mL of 0.479 M H2SO4
osmium has a density of 22.6 gcm3. what volume would be occupied by a 21.8 g sample of
Write any two characteristics of Chemisorption.Why does physisorption decrease with the increase of temperature?
Carbon dioxide has an enthalpy of sublimation of 25.2 kJ/mol at -78 OC. If 0.975 kg of dry ice is placed into a bowl open to the atmosphere (i.e., constant pressure), what is the entropy of sublimation at this temperature
Finely divided sulfur ignites spontaneously in fluorine gas to produce sulfur hexafluoride, as in the following equation S(s) + 3F2(g) --> SF6(g)
12.00g of an unknown solid is dissolved in 200.0g benzene. If the mixture freezes at 3.45 Celsius. Determine the molar mass of the compound. Benzene's freezing point is 5.49 Celsius.
Calculate the percentage composition by mass of each of the elements in sulfuric acid. Report each of your answers to 4 significant figures
if the oxalic acid in a 50.0 ml of aqueous spinach extract was titrated with 0.0250 molarity naoh and the 1st
After 273 m3 of ethylene oxide at 748 kPa and 525 K is cooled to 239 K, it is allowed to expand to 1.10 x 10 3(to the 3rd) m3. What is the new pressure
how do i calculate delta G at a given temperature when delta H and delta S remain unchanged
An equilibrium mixture at 225 degrees C contains .14 M NH3 and .18 M H2 for the reaction 3H2(g)+N2(g) 2NH3(g). if the Kc at this temperature is 1.7 X 10^2 what is [N2]
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