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What is the internal energy change for the system if 969 joules of heat flows into the system from the surroundings and 253 joules of work is done by the system on the surroundings?
Enter an integer, with a "+" or "-" sign as appropriate. Don't forget to include an appropriate SI abbreviation for the units
A line in the emission spectrum of an atom occurs at a wavelength of 560 nm. What is the energy difference between the two energy levels involved in this emission.
if 500g of potassium chlorate solid decomposes and produces 303g of potassium chloride solid, how many grams of oxygen gas are produced?
What volume of gaseous chlorine at STP would you need to obtain a 250.0 g sample of gas
If 1/2 mole of oxygen are reduced at the end of electron transport, how many moles of electrons and protons are needed in order to accomplish that conversion?
To determine its identity, 0.150g of the unknown was dissolved using 10.00ml, 0.531 M HCl. Three drops of methyl orange was added to the solution and then titrated with 0.2440 M NaOH.
A student heats 5.128 g sodium bicarbonate to completely decompose the sample to sodium carbonate. 3.2349 g of sodium carbonate was produced. Calculate the atom economy of this reaction.
Determine the number of bonding electrons and the number non-bonding electrons
The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2 (aq, 0.100 M)||Zn2 (aq, ? M)|Zn(s) is 28.0 mV at 25 °C. Calculate the concentration of the Zn2
what is happening when Nh4Cl is added to NH3 (a basic solution)? what is happening when HCl is added to NH3? how are these example
Calculate the uncertainty in position. The function Ax(1-(x/a)) is an acceptable wave function for the particle in the one dimensional
A 0.5485 g solid mixture have only ferrous chloride hexahydrate and ferrous ammonium sulfate hexahydrate. dissolved in 1M sulphuric acid get oxidized to Fe3+ with hydrogen peroxide, and get precipitated with cupferron.
A pH of 3.74 is reached when 18.50 mL of sodium hydroxide has been added to the acid solution. What is the molar mass of formic acid given this data?
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