Describe and justify the optimal type/amount of carbohydrate consumption for various times related to exercise (pre-, during-, post-)
In: Chemistry
- Minimum 2 pages
- Topic: Scientific discovery/development relating to chemistry (no more than 3 years ago)
Paper should cosnsist of:
- Brief summary of the topic
- Why it is important (why you chose it)
- How it will affect society (positively/negatively)
Please, give me a hand for this paper. I can not find the topic at all, and it's hard to cauth the points up.
The due date is until Thursday.
In: Chemistry
What are resistant starches/carbohydrates? Why are they considered a ‘good’ carbohydrate? Would they be good to consume during exercise? After? Explain. What is retrogradation?
In: Chemistry
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Heat of Vaporization and Heat of Fusion Learning Goal: To calculate the total energy required to convert a solid to a gas using heat capacity, heat of fusion, and heat of vaporization. The amount of heat required to melt one mole of a solid is called the heat of fusion (ΔHfus). The amount of heat required to vaporize (boil) one mole of a liquid is called the heat of vaporization (ΔHvap). The heat of fusion and the heat of vaporization can be used to calculate the amount of heat needed to melt or vaporize, respectively, a given amount of substance.For example, the heat of fusion for H2O is 6.02 kJ/mol, which means that 6.02 kJ of heat is needed to melt a mole of ice. Twice as much heat is needed to melt twice as much ice, as shown here: 2.00 mol×6.02 kJ/mol=12.0 kJ |
Constants Heat of fusion (ΔHfus) is used for calculations involving a phase change between solid and liquid, with no temperature change. For H2O, ΔHfus=6.02 kJ/mol. Specific heat capacity (C) is used for calculations that involve a temperature change, but no phase change. For liquid water, C=4.184 J/(g⋅∘C). Heat of vaporization (ΔHvap) is used for calculations involving a phase change between liquid and gas, with no temperature change. For H2O, ΔHvap=40.7 kJ/mol. Part A How much heat is required to melt 52.5 g of ice at its melting point? Express your answer numerically in kilojoules.
SubmitHintsMy AnswersGive UpReview Part Correct Part B How much heat is required to raise the temperature of 52.5 g of water from its melting point to its boiling point? Express your answer numerically in kilojoules.
SubmitHintsMy AnswersGive UpReview Part Incorrect; Try Again; 4 attempts remaining; no points deducted ****NEED HELP PLEASE PART B ANSWER IS WRONG**** |
In: Chemistry
Every time the compound is contaminated the melting range will go up.
Group of answer choices
True
False
In: Chemistry
Using the following data, calculate the Hrxnfor the reaction: C2H4(g) + H2(g) →C2H6(g) (ch8)
1.H2(g) + . O2(g) H2O(ℓ)H1= –285.8 kJ
2.C2H4(g) + 3 O2(g) 2 H2O(ℓ) + 2 CO2(g)H2= –1411 kJ
3.3 H2O(ℓ) + 2 CO2(g) 7/2 O2(g) + C2H6(g)H3= –(–1560 kJ)
In: Chemistry
Question 1
How many orbitals are in a 4d subshell?
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1 |
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3 |
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5 |
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6 |
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7 |
4 points
Question 2
Which of the following requires the greatest amount of energy to remove one valence electron from an atom?
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Al |
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Ga |
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C |
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Si |
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N |
4 points
Question 3
Which of the following bonds is most polar?
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C |
In: Chemistry
Balance the following redox equation in basic conditions:
Ag(s) + MnO4⁻(aq) ⟶ MnO2(s) + Ag+(aq)
What is the stochiometric coefficient for H2O in the balanced equation?
In: Chemistry
Part A -
Bovine Insulin
An aqueous solution containing 1.0 g/liter of bovine insulin (a protein not ionized) has an osmotic pressure of 3.1 mm Hg at 25
In: Chemistry
What process would you use to disrupt the primary level of organization of a protein? [Select all that apply]
A. Hydrolysis
B. Denaturation
C. Hydrogenation
D. Acidification
E. Enzymatic digestion (Protease)
In: Chemistry
Calculate the pH after 0.14 mole of NaOH is added to 1.09 L of a solution that is 0.49 M HNO2 and 1.18 M NaNO2, and calculate the pH after 0.28 mole of HCl is added to 1.09 L of the same solution of HNO2 and NaNO2.
| 0.14 mole of NaOH | |
| 0.28 mole of HCl |
In: Chemistry
What are the critical temperatures and pressure values of three different fluids, namely CO2, N2 and Air? Discuss which is more suitable for use in supercritical fluid extraction and why.
In: Chemistry
A miniature volcano can be made in the laboratory with ammonium dichromate. When ignited, it decomposes in a fiery display. (NH4)2Cr2O7(s) → N2(g) + 4 H2O(g) + Cr2O3(s) If 0.70 g of ammonium dichromate is used, and the gases from this reaction are trapped in a 13.3 L flask at 28 °C, what is the total pressure of the gas in the flask? What are the partial pressures of N2 and H2O?
In: Chemistry
an ic engine burns octane C8H18 and uses 125% theortical air.the air and fuel enter at 25, the product leave at 700k. in the engine 85% of carbon burns to co2 and the remainder burn to co. the heat transfer loss to the cooling jacket is negligible. determine the power output if the engine burns 6kg fuel per hour
In: Chemistry
In: Chemistry