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Describe how ethanol can be produced from ethene

Ethanol can be produced by hydrating ethene, through reacting it with steam under the influence of a catalyst e.g. phosphoric acid.
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Answered by Amy A. • Chemistry tutor
4211 Views

From the perspective of food security, how successful is China's one child policy?

In theory, China’s one child policy should drive down per capita food consumption which therefore could lead to increased food security in the future. However, in practice, China have not stringently carried...
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Answered by Thomas F. • Geography tutor
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How do the components of a plasma membrane affect the movement of substances into and out of a cell, and why is this regulation important?

Phospholipids and proteins regulate the movement of substances through the membrane, thereby allowing the membrane to be selectively permeable . This is important since it allows the cell to, for example, ma...
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Answered by Joy H. • Biology tutor
3839 Views

Find the integral of tan^2x dx

You can not integrate tan 2 x but you can integrate sec 2 x Since sec 2 x = 1 + tan 2 x Then tan 2 x = sec 2 x-1 so the intragral of tan 2 x dx = the integral of (sec 2 x-1) dx = intrgral of sec 2 x dx + int...
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Answered by Nandini P. • Maths tutor
21390 Views

Find the determinant of a 3x3 square matrix

We can expand following any row or column we want. A wise choice would be to use a row/column in which we have one or more zero entries to reduce the calculations. From this, we pick the first entry on the c...
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