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How and why does sp3 hybridization occur?

1 st consider the bonding in methane, CH4. The carbon atom forms 4 single covalent bonds to hydrogen atoms. However, when we consider the electronic configuration of Carbon (electrons-in-box notation), there...
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Answered by Farah D. • Chemistry tutor
16671 Views

How can I structure answers for a long writing question?

The first step is to create a basic checklist which can be used for any of these types of questions. This could include a few grammar tenses and structures, a few versatile bits of vocabulary, and some point...
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Answered by Cecilia O. • French tutor
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Solve the simultaneous equations for x and y: 3x+3y=5 and 6x+5y=9

3x+3y=5 6x+5y=9Multiply the first equation by 2 to get a workable x coefficient:6x+6y=10Write the equations above each other and subtract them:6x+6y=10 - 6x+5y=9 y = 10-9y = 1 By substituting your answer for...
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Answered by Joe C. • Maths tutor
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How can molecules cross a cell membrane?

Semi-permeable membranes in the cell will let some molecules through but not others. There are three main ways in which these molecules can move. 1) Active transportAs the name suggests, here, molecules are ...
JR
2963 Views

I do not understand why some words in French start with "le" "la" "une" or "un". Why isn't it just "the" or "a"?

French can be confusing like that! In English, nouns are neither feminine or masculine. So you can always use the same articles such as "a" or "the". In French, each word has a gender. Fo...
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Answered by Marjotte M. • French tutor
4046 Views