Starch is a polysaccharides which is made up of a long chain of glucose. The sub units that for starch are GLUCOSE. The long chains of glucose in starch are connected by alpha 1,4 linkages. The simplest starch in existence is amylose.
<span>The alkali metals and hydrogen are reactive because they have only one electron to give in order to complete their valence shell. It is easier to give that one electron so when given the opportunity they will. This means they will react with anything polar or willing to take an electron.</span>
Answer:
This is because no energy is being created or destroyed in this system
Explanation:
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Answer:
(Highest kinetic energy)
3. Neon at 65 K and 15 atm
2. Neon at 55 K and 10 atm
4. Neon at 25 K and 5 atm
1. Neon at 5 K and 0 atm
(Lowest kinetic energy)
Explanation:
In gases, <em>kinetic energy is higher the higher the temperature is</em>. This is because the molecules have more available energy under those conditions. <u>Generally there's also an increase in kinetic energy if there's an increase in pressure</u> -assuming there's no phase changes ie. the gas condenses into a liquid-.
Answer:
the entropy change for the surroundings when 1.68 moles of Fe2O3(s) react at standard conditions = 49.73 J/K.
Explanation:
3Fe2O3(s) + H2(g)-----------2Fe3O4(s) + H2O(g)
∆S°rxn = n x sum of ∆S° products - n x sum of ∆S° reactants
∆S°rxn = [2x∆S°Fe3O4(s) + ∆S°H2O(g)] - [3x∆S°Fe2O3(s) + ∆S°H2(g)]
∆S°rxn = [(2x146.44)+(188.72)] - [(3x87.40)+(130.59)] J/K
∆S°rxn = (481.6 - 392.79) J/K =88.81J/K.
For 3 moles of Fe2O3 react, ∆S° =88.81 J/K,
then for 1.68 moles Fe2O3 react, ∆S° = (1.68 mol x 88.81 J/K)/(3 mol) = 49.73 J/K the entropy change for the surroundings when 1.68 moles of Fe2O3(s) react at standard conditions.
