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Problem: A 5.70-g sample of iron is heated from 45.0°C to 75.0°C. The amount of energy required is 76.95 J. What is the specific heat capacity of this sample? Please provide the authentic solution of this problem.
For UV light of wavelength 254 nm, calculate the frequency and the amount of energy absorbed by a single molecule when it absorbs a quantum of this light. (Remember ??=c, where c = 3.00 x 108m/s and E = h?, where h = 6.63 x 10-34 J·s) 1nm = 1x10-9..
For oxygen difluoride, OF 2 give the following information: a.) Available Electrons (AE) b.) Needed Electrons (NE) c.) Geometry Description d.) Number of sigma bonds
An ideal gas at 300K has an initial pressure of 15 bar and is allowed to expand isothermally to a pressure of 1 bar. Calculate the maximum work that can be obtained from the expansion
Two students measure the density of gold. One works with a 100-g bar of pure gold. The other works with a 200-g bar of pure gold. Which student measures the larger density.
What is the equilibrium partial pressure of water vapor in the air at 25 degrees Celsius, and how much water remains in the bucket after equilibrium is established
a gas has a volume of 534 ml at 25 degrees celsius and under a pressure of 73.0 cmhg. correct the volume to standard
The common ion effect states that when a weak acid solution of HA (pH3.1 by itself) is mixed with a solution of NaA, the solution pH will
Suppose you made up a solution in which you dissolved 4.5 g of glucose (C6H12O6) into a total volume of 200mL. What is the % w/v concentration
it is desired to produce an aqueous solution of ph8.75 by dissolving one of the following salts in water at 298 k.
which mixture would not be expected to be homogeneous? pentanol and hexane kbr and water acetic acid and methanol
A 224mL sample of an aqueous solution contains 2.80% MgCl2 by mass. Exactly one-half of the magnesium ions are Mg?28, a beta emitter with a half-life of 21 hours
Which of the following pairs of elements is most likely to form a covalent bond? Select one:a. Ca and O, (b) CS AND BR (C) CI AND S (d) Mg and N
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