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How do you balance chemical equations?

Example question: _H 2 O --> _O 2 + _H 2 First, work out how many of each element you have on each side. For example in this equation, Left: 2 hydrogen and 1 oxygen Right: 2 hydrogen and 2 oxygen We can t...
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Answered by Eve W. • Science tutor
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Conjugate the verb and underline the correct option --> Aunque yo ………………………………. (saber) la verdad, no te lo/la podría contar

Aunque yo supiera la verdad, no te la podría contar. If we analyze the second clause in the sentence, we notice that the verb poder is in the conditional tense. This implies that the 'aunque yo' is to be tra...
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Answered by Oscar S. • Spanish tutor
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Name the three components that make up a nucleotide

First of all a nucelotide is the monomer that makes up DNA. Millions of monomers are joined together to form the double helix of a DNA molecule. A nucleotide is made of a pentose sugar (in the case of DNA th...
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Answered by Amy S. • Biology tutor
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Differentiate x^3 − 3x^2 − 9x. Hence find the x-coordinates of the stationary points on the curve y = x^3 − 3x^2 − 9x

To differentiate, we bring the power down and decrease the power by 1. So x 3 becomes 3x 2 , -3x 2 becomes -6x, and -9x (which can be written as -9x 1 ) becomes -9. So y' = 3x 2 - 6x - 9 This equation tells ...
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Answered by Tutor105800 D. • Maths tutor
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How do I plan an essay question on a poetry collection?

As you will know, an essay question on a collection of poems will require at least two poems to be mentioned - it will end up being a more comparative-style essay than GCSEs. Therefore, planning out a tight ...
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