Chemistry, 23.09.2019 07:00 whitefraide
Which characteristic best explains the difference in melting behavior of covalent substances and ionic substances?
a. ionic substances have weaker intermolecular attractions.
b. ionic substances usually have stronger atomic bonds.
c. covalent substances have weaker intermolecular attractions.
d. covalent substances usually have stronger atomic bonds.
Answers: 2
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If two atoms are bonded to a central atom with no lone pairs,how will they be arranged
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
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The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
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Chemistry, 23.06.2019 00:30
Which of the following best describes technology a. something created for only scientists to use b.the method of thinking that scientists use. c.the application of engineering to create useful products. c. a scientific idea
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Which characteristic best explains the difference in melting behavior of covalent substances and ion...
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