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olga2289 [7]
3 years ago
11

List 5 examples of electromagnetic radiation.

Chemistry
1 answer:
jekas [21]3 years ago
3 0
Visible light, x-rays, ultraviolet, infrared light, microwaves, and radiowaves
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<span>H2O2 First, let's determine how many moles of hydrogen and oxygen atoms we have. Start by looking up the atomic weights of those elements: Atomic weight hydrogen = 1.00794 Atomic weight oxygen = 15.999 Moles hydrogen = 1.33 g / 1.00794 g/mol = 1.319522987 mol Moles oxygen = 21.3 g / 15.999 g/mol = 1.331333208 mol We now have a ratio of 1.319522987 : 1.331333208 and we want a ratio of small integers that is close. Start by dividing all the numbers in the ratio by the smallest value, giving: 1 : 1.008950371 This ratio is acceptably close to 1:1 so I assume the formula is of the form HnOn where n is a small integer. Let's initially assume that n is 1, so the mass would be 1.00794 + 15.999 = 17.00694 Obviously 17 is far smaller than 34.1. So let's divide 34.1 by 17.00694 and see what n should be: 34.1 / 17.00694 = 2.005063815 So the formula we want is H2O2, which is hydrogen peroxide.</span>
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What is one thing that all polysaccharides have in common?
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<h3><u>Answer</u>;</h3>

D. All polysaccharides are made up of carbon, hydrogen, and oxygen.

<h3><u>Explanation</u>;</h3>
  • A polysaccharide is a large molecule made of many monomers called monosaccharides such as glucose, galactose, fructose, etc.
  • Polysaccharides can be homopolysaccharides, where all monosaccharides are the same or heteropolysaccharide in which the monosaccharides vary.
  • They may be linear, where a molecule of polysaccharides has straight chain of monosaccharides, or branched polysaccharides in which a chain has arms.
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