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The American Civil War had a major impact in American economy; while the North flourished, the South was left in ruins. The South, an agriculutural society, lost its ability to exploit profitable slave la...
In this question we have to use the equation Moles= Mass(g)/ Mr. We have the mass of PbO2 so to find the moles we need to divide the mass, which is 37.2g, by Its Mr, which is 207.2 + (162) = 239.2. th...
To expand, you would multiply each term in the first bracket set by each term of the second bracket set. Thus, your expansion would mean:3a^2 -6ab + ab -2b^2To simplify, note that there are two 'ab'...
There are three blood vessel types in humans: arteries, veins and capillaries.Arteries pump blood away from the heart (easy point to remember - "A" in arteries = AWAY from the heart) while veins...
Plant cells have cell walls and animal cells do not. Plant cells also have chloroplasts while animal cells do not.Optional third point: plant cells have vacuoles while animal cells do not.
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