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An unknown mass of each of the following substances, initially at 23.0 °C, absorbs 1930 J of heat. The final temperature is recorded as indicated. Find the mass of each substance. Part B: sand (Tf= 62).
Ethanol is frequently present in solvent -grade diethyl ether. If this grade rather than anhydrous were used what effect would the ethanol have on the formation of the grignard reagent
I take 250.0 mL of 0.25 M NaCl and mix it with 500.0 Ml of 0.100 M NaCl. what is the concentration of NaCl in the mixture
Proper equilibrium expression for the following reaction. 6CO2(g) + 6H2O(l) -> C6H12O6(s) + 6O2(g)
The wavelength of light emitted if the electron drops from n=5 to n=4 will be shorter than the wavelength of light emitted when the electron falls from n=5 to n=3.
Use the dipole moments of HF and HCl ( HCl= 1.08 D, HF= 1.82 D) together with the percent ionic character of each bond (HCl 20% ionic, HCl 45% ionic) to estimate the bond length in each molecule.
Because of increasing evidence of damage to ozone layer,CFC production was banned in 1996.However, there are 100 million auto air conditioners that still use CFC-12(CF2C12) These air conditioners are recharged from stockpiled supplies of CFC-12.
A typical popcorn kernel has a volume of .250 mL and contains 1.114 mg of water. The kernel will pop at a temperature of 170 C. What is the pressure in atm inside the kernel right before it explodes?
to obtain the same antifreeze protection requires 76 of propylene glycol to replace each 62 of ethylene glycol.
Problem- If all of the energy from decay of the 40-K in one banana could be captured and converted into electrical energy, how many bananas would be needed to power a 100 W light bulb
Iron reacts with chlorine gas as follows: 2 Fe (s) + 3 Cl2 (g) > 2 FeCl3 (s)
utilized 2.18 g of 0.15 M cobalt (II) nitrate to prepare as well as dissolve in 25mL of deionized water then added 35 more mL of rinsing to the volumetric flask. Explain what is the concentration
1. The entropy of a substance increases when converted from a liquid to a solid 2. The entropy of a substance decreases as its temperature increases 3.All substances have positive entropy values at temperatures above 0 k a) 1 only b) 2 only c) 3 o..
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