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Such a star could be thought of as a huge atomic nucleus. When a star of mass of around 1.4 x 1.99 x 10^30 kg collapsed into neutrons (mn = 1.67 x 10^-27 kg), determine what would its radius be? (Su
When using TLC plates how you do pick out the best solvent? For example: Match the appropriate solvent out of ethylene chloride, hexane, and acetone for each of the following: 2-phenylethanol, brom
Why are these molar volumes slightly less than the ideal molar volume, 22,4L/mol when the molar volume for HCl and CO2 are 22,262L/mol and 22,262L/mol, respectively?
Calculate the number of valence electrons for the molecules NH3, CH4 and H2O by adding up the valence electrons for the constituent atoms. Calculate the numbers of -bonds and the number of lone elec
By using 2.30 x 10^17 kg/m3 as the density of nuclear matter, determine the radius of a sphere of such matter which would encompass a mass equivalent to that of Earth. Earth consists of a mass equiv
Explain what is meant by the polarity of molecules? Explain what causes differences in polarity? Illustrate the structural formula of isopropyl alcohol. Discuss how it differs in polarity from the wat
A 0.1247 g sample of ascorbic acid, Vitamin C, was burned in a carbon-hydrogen combustion apparatus to form the 0.0510 g of water and 0.1869 g of carbon dioxide.
A 32 N force, parallel to the incline, is needed to push a certain crate at constant velocity up a frictionless incline which is 30 degrees over the horizontal. Determine the mass of crate?
Calculate the molecular formula for this compound. Determine the numbers of moles of hydrogen atoms are in one mole of molecules (or equivalently discuss how many hydrogen atoms are in one molecule)
If it took 7.85 of a.102 M H2SO4 to reach the equivalence point, given a 10.0 mL sample of an unknown Ba (OH)2 solution.
Discuss why p-nitro phenol is a stronger acid than the phenol itself. Would p-methoxyphenol be a stronger or weaker acid than phenol? Explain.
Explain what percentage of hydrogen is present in a 2-g sample of hydrogen chloride? A 1-g sample of the compound hydrogen chloride was determined and found to be 97.3 percent chloride and 2.
Make sure in the first case, the t-butyl group and the ethyl group are cis to each other and the vinyl group is trans to these two groups. "There are two stereoisomers of1-t-butyl-
Compute the amount of mechanical work essential to lift a 120 kg barbell 2.00m (iv) He drops the barbell to the floor and lifts it continually.
A mixture of 25% hydrogen and 75% propane is burned with the 25% excess air. Fractional conversions of 85% of the hydrogen and 90% of the propane are achieved; of the propane that reacts, 95% reacts
Determine the mass percent of sulfuric acid in the original battery acid sample (assume sulfuric acid completely ionizes both protons in this solution)
Of the 18 who tested positive, three finished in top 10. 25 cyclists tested negative. How many cyclists who tested negative didn't finish in top 10? How many cyclists were tested?
The electric field within a 30 cm long copper wire is around 0.010 V/m. Determine the potential difference among the ends of the wire? Determine the current in the wire? The diameter of the wire is
What effect does the ph of the solution have on the reactivity of the phenol? In this reaction, diazonium salts couple with phenols in slightly alkaline solution.
How high would it go in comparison to the tennis ball if the same amount of energy were imparted to a ball the same size as a tennis ball, but of twice the mass.
A car having mass 1.20 x 103 kg is primarily moving on a level road at a speed of 22.0 m/s. Calculate the raise in temperature of the brakes, supposing that all the mechanical energy ends up as int
A crate of 11 kg is pulled through a force 150N (parallel to the incline) up a rough 35 deg incline. The crate consists of an initial speed 1.65 m/s. The crate is pulled a distance of around 8.21 m
Currently Jack has been in poor health and would like you to evaluate the estate tax must he die this year. Jack evaluates the taxable estate (after deductions) will be worth $5.4 million at the de
A satellite functions at an altitude of around 19,700 km and employs communication frequencies of 1609.58 MHz. Determine the gravitational frequency change with respect to the Earth.
At what average rate would heat have to be eliminated from 1.5 L of water to decrease the liquid's temperature from 20 deg C to its freezing point in around 3 minutes?