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Question- Write one paragraph (no more than half a page) summarizing the properties of each of the following groups 4A, Group 5A, Group 6A and Group 7A.
State your answer as a chemical formula.
The flask revealed here contains 10.0mL of HCL as well as a few drops of phenolphthalein indicator. The burette contains 0.120 M NaOH.
a gaseous system undergoes a change in temperature and volume. what is the entropy change for a particle in this system
According to the valence bond theory, which of the following molecules involves sp2 hybridization of orbitals on the central atom?
how heavy in pounds is a gold bar at Fort Knox (dimensions of 7.0 in x 3 5/8 in x 1 3/4 inches? If the current price for gold is $1400 per troy ounce, how much is 1 bar of gold worth in ? (make sure you look up troy ounce!)
Enough of a monoprotic acid is dissolved in water to produce a 0.0113 M solution. The pH of the resulting solution is 6.43
What volume of a stock 0.0242 M of KOH solution is required to titrate 0.147 g of oxalic acid dehydrate, H2C2H4 . 2H2O to a phenolphthalein endpoint?
An alloy is made of Copper (Cu) and tin (Sn). The density of the alloy is found to be 8.76g/cm3. The reported densities of copper and tin are as follows: Cu = 8.96g/cm3 Sn = 7.30g/cm3. Find the % of copper and zinc in the alloy.
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 9.80..
the age of any remains from a once-living organism can be determined by radiocarbon dating a procedure that works by
A solution is made by dissolving 45 g toluene (C7H8) in 125 mL of liquid benzene (C6H6; d=0.874 g/mL). What is the molality of toluene in the resulting solution.
When 5.00 g of fructose, C6H12O6, (FW 180.16 g/mol) is burned in a calorimeter whose heat capacity is 29.7 kJ/oK, the temperature increases by 2.635oK. Calculate the heat of combustion of fructose in kJ per mole.
0.200 mol of NO is placed in a one liter flask at 2273K. After equilibrium is attained 0.0863 mol N2 and 0.0863 mol O2 are present. What is the Kc for this reaction
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