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Solid ammonium chloride, NH4CI reacts with solid sodium hydroxide to produce ammonia gas, water and sodium chloride NaCl
a, write a balanced equation for this reaction
b, according to the bronsted -lowry definition, which species is the acid species is the base explains
A current of 4.67 A is passed through a Sn(NO3)2 solution for 1.80 hours
When 2.45 g of an unknown weak acid HA with a molar mass of 85.0g /mol is dissolved in 250.0g of water, the freezing point of the resulting solution is -0.256 C.
Decide whether or not each of the following metals dissolves in 1M HCl. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves
How many atoms are contained in one unit cell of of this element? The atomic mass of the element is 193.5 amu.
What information is obtained from the partition function? How is the partition function used to calculate state functions u, s, and a
At 100 ?C the vapor pressures of hexane and octane are 1836 and 354 torr, respectively. A certain liquid mixture of these two compounds has a vapor pressure of 666 torr at 100 ?C. Find the mole fractions in the liquid mixture and in the vapor phas..
The element lanthanum has an atomic weight of 139 and consists of two stable isotopes lanthanum-138 and lanthanum-139.
What mass of carbon dioxide is produced from the complete combustion of 7.50×10^-3g of methane?
When the sodium atom becomes a sodium ion, how does the size and electron configuration of the sodium atom change?
How many different kinds of polypeptides, each composed of 12 amino acids, could be synthesized using the 20 common amino acids?
Cortisol ( M=362.47g/mol); Corisol is 69.6% C, 8.34% H, 22.1% O by mass. What are the empirical and molecular formula?
the concentration of carbon monoxide in a sample of air is 9.2 ppm. there are how many molecules of CO are in 1 liter of 755 torr and 23 degrees celcius
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