Chemistry, 22.01.2020 23:31 2002babygurl
The density of sio2 is 2.27 g cm-3. given that its structure is amorphous, calculate the number of molecules per unit volume, in nm-3. compare your result with (a) and comment on what happens when the surface of an si crystal oxidizes. the atomic masses of si and o are 28.09 and 16,respectively
Answers: 1
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Asmall amount of a solid is added to water. the observation made after fifteen minutes is shown in the figure. which of these solids has been probably added to water? a) oil b) sand c) sugar d) wood chips
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Chemistry, 22.06.2019 06:30
Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d
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Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
The density of sio2 is 2.27 g cm-3. given that its structure is amorphous, calculate the number of m...
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