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Abanoub M.
Chemistry Tutor
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Organic Chemistry
TutorMe
Question:

The reagent used to convert 2-butyne to cis-2-butene is a) Li / NH3 b) H+ / zinc dust c) Na / NH3 d) H2 / Lindlars catalyst e) H2 / Pt

Abanoub M.
Answer:

answer: d

Chemistry
TutorMe
Question:

If you lived in Alaska, which of the following natural gases could you keep in an outdoor storage tank in winter and why? methane (CH4), propane (C3H8), or butane (C4H10)

Abanoub M.
Answer:

Methane, Propane, and Butane are non-polar gases. Therefore, it has one type of intermolecular forces which is London force. As molecular weight increases, London force between the molecules increases and so boiling point increases. Therefore, we can arrange the three gases, according to their boiling points: Butane < Propane< Methane, so we can conclude that at very cold Temperature (outdoor), Butane and Propane (less volatile) will freeze while Methane (More Volatile) will not freeze and still a gas. Therefore, the only gas, which we can store outdoor is Methane.

Basic Chemistry
TutorMe
Question:

Give the number of significant figures: 1- 5623.00 2- 0.031

Abanoub M.
Answer:

1- six significant figure 2- two significant figures

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