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The binary hydrogen compounds of the Group 4A elements and their boiling points are: CH4, -162 deg C; SiH4, -112 deg C; GeH4, -88 deg C; and SnH4, -52 deg C. Explain the increase in boiling points from CH4 to SnH4.
Which of the following substances have a standard heat of formation (?Hf°) of zero? Fe at 1200 °C Cl2(g) at 2 atm O2(g) at 25.0 °C and 1 atm C2H6(g) at standard conditions
You have measured the absorbance for a vitamin sample to be 1.2 at a wavelength of 264. Can you use this reading to determine the INITIAL CONCENTRATION of your vitamin sample?
Typically an adult will inhale 2.1 L of air per breath. What mass of ozone is taken into the lungs per breath by an adult breathing air containing 1.57 x 10^-4 micro(ug) grams of ozone per cm^3 of air?
what is the hybridization of phosphorus in the phosphonium ion (PH4+)
for the reaction X(g) + 3Y(g) equilibrium 3Z(g). Kp=2.08x10^-2 at a temperature of 277 degrees Celsius. Calculate the value of Kc
A gas contains 17% O2, 11% CO2 and 72%N2. It is at 1.013 *105 Pa pressure. Calculate the partial pressure of each component
if the reaction occurs at atmospheric pressure p 1 atm how much work in joules is done by the system in pushing back
In an endothermic reaction, in going from the reactants to the products at the same temperature, the value of q is negative.
Given 5.2 g of hydrobromic acid (48%) calculate the number of mL. (MW HBr: 80.91 g/mol, density: 1.49 g/mL) I am getting 1.675 but it is counting it wrong. Anyone else getting something different
How would one synthesize 1,3-dibromo-2-methoxy-5-nitrobenzene starting with benzene
Which of the following atoms has the smallest radius? At, Br, Ge, or Pb? Which of the following atoms has the smallest radius? At, Br, Ge, or Pb? The answer is Ge. Based on trends, wouldn't Br have a smaller atomic radius than Ge?
derive Raoul's law using the chemical potentials of the constituents that make up the mixture of the solution.
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