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A 500 ml sample of O2(g) is at 780 mmHg and 30C. What will be the new volume if, withe the constant pressure and amount of gas, the temperature is decreased to -15c
A 155 g sample of an unknown substance was heated from 25.0°C to 40.0°C. In the process, the substance absorbed 5696 J of energy. What is the specific heat of the substance?
Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O or N, is a chiral compound
What if any experimental evidence do you have that the equilibrium is affected by the addition of concentrated HCL? Explain Are your observation and explanation in A consistent with Le Chatelier's Principle? Explain
What mass of CCl2F2 substance must evaporate in order to freeze 135 g of water initially at 15 degrees celsius? (The heat of fusion of water is 334 J/g the specific heat of water is 4.18 J/gK .)
Draw a mechanism for each reaction which explains the results. All electron movement must be indicated by arrows.
Calculate the expected pH values of the buffer systems from the experiments (a, b, c, d) using the Henderson-Hasselbalch equation (pH= pKa + log [A-] ). Use for pKa values: carbonic acid= 6.37 and acetic acid= 4.75.
A certain reaction between a weak acid (boric acid) and a strong base (sodium hydroxide) has an equilibrium point at a pH of approximately 11. From what you know about indicators, which indicator would be best to use to tell when neutralization ha..
The equivalence point is reached after addition of 25.0 ml Naoh a) calculate the ionication ka for the acid HA
Using the abbreviated noble gas notation write the ground state electron configuration of the following ion
Consider the molecule cyclohexane, which contains only hydrogen and carbon atoms. When a sample is burned in oxygen, 4.822 g of CO(2) and 1.650g of H(2)O are obtained. What is its simplest formula?
Calculate the mass of glucose metabolized by a 54.8 person in climbing a mountain with an elevation gain of 1730
Determine the molecular geometry of each of the following molecules
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