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The specific heat is the amount of heat required to raise the temperature of one gram of a substance one degree Celsius. A 75.0g sample of an unkown substance absorbed 2.93kj of energy as it changed from a temperature of 23.2 C to 95.4c. What is the specific heat of the unknown substance.
suppose that we have a mixture of n2 g and o2 g of unknown composition whose total pressure is 385 torr. if all the
A proton in a linear accelerator has a de Broglie wavelength of 117pm. what is the speed of the proton?
Explain what is the molecular weight of an ideal gas if 0.480g of the gas occupies 590mL at 365torr and 45 degrees C
If 0.208g of an unknown salt of oxalate ion requires 25mL of 0.02 M MnO4^- solution, calculate the molar mass and write the molecular formula of the unknown ( oxalare is the anion, what is the cation).
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.00 mL Ti solution of unknown concentration with 2.00 mL of a 10.1 ?g/mL solution of Co.
Chemicals found in water include a minerals such as a.calcium, silica and magnesium b. lead c.arsenic d.all of the above
Define that the alkyl groups activating or deactivating to a benzene ring in electrophilic substitution. Are they o-, m- or p- directing.
In an experiment 20ml of 0.20M NH4OH is titrated with 0.25M HCl. What is the pH at the equivalent point
explain why a glacial acetic acid in a conductance set-up does forms gradually brighter lights that is dim to bright
An unknown compound has a melting point of 121 - 122 °C. Melting point of a mixture of pure benzoic acid and your unknown sample was 116-122 °C. Melting point of a mixture of 2-naphthol and your unknown sample was 110 - 116 °C. What is your unknow..
Draw the two alkenes that would yield 1-methylcyclohexanol when treated with hg(OAc)2 in water
Using the balanced equation: 2NaCl(s)+ 1H2SO4(aq)= 2HCl(aq)+1Na2SO4(aq) a. If 20. G of NaCl are used, and only 5.6 g of HCl are isolated, what is the percent yield of HCl? b. If only 5.6 g of HCl are obtained, how many grams of Na2SO4 must also ha..
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