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JOe makes a buffer solution for an experiment. He intends to have the pH set to 10.0 . He uses acetic acid /acetate as the buffer system. Is the oH buffered in the desired range. How would you improve on Joe experiment design
when carbon is burned in the presence of oxygen, the carbon and oxygen combine to produce carbon dioxide. if you start with 3 grams of carbon and 8 grams of oxygen and they react completely, how many grams of carbon dioxide will be produced?
calculate the number of NaCl formula units formed when 190 Na atoms and 98 Cl2 molecules react? 2Na + Cl2 → 2NaCl
What weight of sodium acetate, NaCO2CH3, must be added to 500.0 mL of 0.500 M acetic acid HCO2CH3 to produce a buffer solution
Cd2+, Co2+ is saturated with H2S at a pH of 3.00. Which metals form a sulfide solid? [H2S]sat=0.10 and Ka1= 1.3e-7 and Ka2=8.5e-14
Calculate the amount of heat required to heat a 3.8kg gold bar from 27 degree celsius to 63 degree celsius.
Calculate how wide is the cloud of organisms at the time peak concentration takes place at the intake pipe.
In a particular biological reaction taking place in the body at 37°C, the change in enthalpy was --135 kJ mol--1 and the change in entropy was --136 J K--1 mol--1. (a) Calculate the change in Gibbs energy (b) Is the reaction spontaneous? (c) ..
Draw and construct the open-chain model of glucose, How many chiral carbons are in the open-chain version of glucose?
when 50.0 g of Copper are reacted with silver nitrate solution Cu + 2AgNo3 - Cu(No3)2 +2 Ag 148 g of silver are obtained. what is the percent yeild of silver obtained?
Ammonia can be oxidized in oxygen as shown: 4 NH3(g) + 3 O2(g) 2 N2(g) + 6 H2O(g). When 0.791 mol of NH3 and 0.814 mol of O2 are placed in a 1.00 L container at a certain temperature,
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.740 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition
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