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1. Which of the following statements about free radicals is true?
options:
Free radicals are considered good because they are good oxidizing agents.
Free radicals are considered good because they are easily oxidized.
Free radicals are considered bad because they are easily oxidized by healthy tissue.
Free radicals are considered bad because they can oxidize healthy tissue.
2. Molecules that function as antioxidants tend to be small ionic compounds.
TrueFalse
3. Which of the following is NOT a common non-enzymatic antioxidant in the human body?
Vitamin C
Vitamin E
O2
All of these are common non-enzymatic antioxidants in the human body.
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
Hemoglobin is the protein that transports oxygen in mammals. Hemoglobin is 0.342% Fe by mass, and each hemoglobin molecule contains four iron atoms. Calculate the molar mass of hemoglobin
Why do we measure the volume of the flask with water rather than using the volume listed on the side?
If the reaction of 2.50 g of aluminum with 2.50 g of oxygen produced 3.50 g of aluminum oxide, What is the % yield of the reaction?
find calories and joules lost when 75.0 g of water H20 cools from 86.4 degrees celsius to 2.1 degrees celsius.
If all the energy obtained by by burning 1.26 lb of butane (fuel value is 10.85 kcal/g) is used to heat 126.0 kg of water at an initial temp of 19.7C, what is the final temperature.
What is the sum of all the coefficients in the balanced equation?
The ionization constant, Ka, for HOI(aq), hypoiodous acid, is 2.3 × 10-11. What is the pH of a 0.050 molar solution of sodium hypoiodite, which contains the hypoiodite ion?
If carbon dioxide gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water at 25 °C is 23.8 torr.
Meaning, use and calculation of empirical formulas, In this introduction are given the explanation of how to find out an empirical formula if one has found out the chemical elements of an unknown substance and measured their ratio of masses
If 18.26 grams of sulfuric acid are reacted with a large amount of aluminum metal, what volume of hydrogen gas would be produced at STP?
If 12800 calories is required to change 45g of substance X from a liquid to a gas, what is the heat of vaporization of substance X?
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