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1)Describe the term hypothesis.
2)What subatomic particles contribute to the atomic mass of an atom?
3)True or False. Your data will either prove or disprove your hypothesis.
4)Using the following information from the periodic table of elements for Nitrogen, determine the number valence electrons this atom contains when electrically neutral: Atomic number: 7; Atomic mass 14
5) Describe a polar covalent bond.
1-consider the element with the electron configuration [Kr]5s2 4d10 5p3. this element is a) an alkali metal b) a representative element c) an actinide element e) a transition metal e) a noble gas
Depict the structures of both of these molecules as well as give a brief explanation why the molar absorptivities of these two species would be expected to be similar.
One of the more effective treatments for HIV-positive individuals has been for them to take protease inhibitor cocktails. certain proteases are required for the virus to mature and these inhibitors prevent them from functioning.
Calculate an unknown concentration of cobalt (II) nitrate if it and the original substance I was using both exhibit the color red? I'm pretty sure the answer is yes, but I want to double check.
Calculate the equilibrium concentration of HC2O4- in a 0.20 M solution of oxalic acid.
An ammonia/ammonium buffer solution contains 0.22M NH3 and 0.83M NH4^+. The Kb value of ammonia is 1.8*10^-5. Calculate the of this buffer.
A solution containing an unknown quantity of A plus 930 nM B gave a relative detector response (peak area of A)/(peak area of B) = 1.21. Find the concentration of A in the unknown.
Dichloromethane has a specific gravity of 1.33: a) What is the mass (kg) of 75 liters? b) What is the volumetric flow rate (L/min) of the dichloromethane entering a storage tank if the mass flow rate is 960 kg/min.
For the balanced reaction 2 K2O2 (aq) O2 (g) + 2 K2O (aq) a mixture of the follow was at equilibrium at 86 °C (atmospheric pressure) in a closed container
1. How large (in kg) an oxygen candle (KClO3) would be needed to supply 8 people with enough oxygen for 24 hours on a small submarine. The average person needs .84 kg of O2 per day.
your chemiluminescence reaction will actually occur very slowly in air. what component of air will bring about this
Write a balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the standard heat of reaction using the appropriate enthalpies of formation
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