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Determine the number of protons and neutrons in a carbon-14 isotope and write its symbol in the form A/Z X
Explain The Chemistry of Food Composition, find the nutritional values/info in food from USDA Nutrient Data Laboratory?
What is the concentration of hydrogen ions in a solution containing 0.321 M HOCN (cyanic acid) and 0.223 M (NaOCN) (sodium cyanate)? The ionization constant of cyanic acid is 3.5 × 10-4.
Calculate the work done (in J) on the surrounding atmosphere (1atm pressure, 25.5 oC ) by the evolution of hydrogen in the subsequent reaction. State any assumptions you have made.
Calculate how much heat is released when this reactions occurs at a constant temperature of 25.00 degree Celicus in a constant-volume container.
There are very few compounds that contain an element from the noble gas family (elements in column 18, rightmost column). Explain why there are so few noble gas compounds in nature.
If a wave has a frequency of 6.9536 x 109 Hz and an energy of 4.6076 x 10-24 J, what is the speed of light.
What are the names and principle differences in the two models of substrate/enzyme complex formation?
water and titrated with 0.0633 M NaOH. After 10.0 mL of base has been added, the pH was determined to be 5.07. What is the Ka for the acid?
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 16.8g of carbon were burned in the presence of 57.4g of oxygen, 12.6g of oxygen remained unreacted. What mass of carbon dioxide was produced
If 3.55 g of CuSO4 are dissolved in 925 mL of 0.30 M NH3, what are the concentrations of Cu2+, Cu(NH3)42+, and NH3 at equilibrium Kf, Cu(NH3)42+= 1.1 x 1013 . Assume that most of the Cu2+ is converted to the complex since K is a very large number...
a 250ml solution of NaOH has 20g of solute. what is the concentration in moles per litre? what is the concentration of each ion?
Calculate the pH during the titration of 24.8 mL of 0.793 M HBr(aq) with 0.219 M KOH(aq) after 14.1 mL of the base have been added.
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