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Students in Dr. Lee’s class were conducting solubility experiments using sucrose and water. Students began with room temperature water (22oC) and then heated the water to boiling. They calculated the amount of sugar that could be dissolved in the water as the temperature increased. Marge and Bill lost their data and were trying to graph their results from memory. Help them out! Which graph is the MOST reasonable representation of their expected data? A) B) C) D)

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9. What type of bonds hold polyatomic ions together?

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What type of bonds hold polyatomic ions together? A. Metallic B. Covalent C. Hydrogen D. Ionic

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How is the mass number calculated for an element

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What mass of sulfur has to burn to produce 4.5l so2 at 300°c and 101kpa s(s) o2( g. so2( g.?

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The number of protons in an atom’s nucleus determines its

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A compound composed of electrically chargerd atoms is called?

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Which hemisphere of the earth releases the most carbon dioxide into the atmosphere? why

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Which statement is true about half-lives? a. different atoms of the same nuclide have different half-lives. b. each radioactive nuclide has its own half-life. c. all radioactive nuclides of an element have the same half-life. d. all radioactive nuclides have the same half-life.

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2Al + 6HCl → 2AlCl3 + 3H2 If 3.0 grams of H2 were produced, how many grams of Al reacted? (Molar mass of Al = 27 g/mol, molar mass of H2 = 2.0 g/mol) ___ grams

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Which element is probably most like carbon

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Kate gathered three boxes of the same size made of different materials: glass, clear plastic, and aluminum painted black. She placed them on a window sill in the sun for an hour and then measured the warmth of the air in each box. Which of the following best describes the purpose of the experiment?A. To relate the size of the box of the warmth of air within the boxB. To relate the type of box material to the warmth of air within the box C. To relate the amount of a time a box is exposed to sunlight to the warmth of air within the box D. To relate the type of box material to the mass of the box

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Which atom on the periodic table would require the most energy to take its electron

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I just need an advantage of disadvantage of Geothermal energy. I just need an advantage of Biomass and disadvantages of Biomass

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What type of bonds hold the atoms together in polyatomic ions

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Energy from the sun travels to the earth throughA. convection B. carbon dioxide C. radiation D. infared radiation

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What part of an atom cannot change without changing the atom’s identity??

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The mass in grams of 6.0 mol hydrogen gas (contains h2) is

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The average mass of all isotopes of n element is called the ______

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In a chemical reaction how does the mass of the products compare with the mass of the reaction a greater thenb less thenc equal tod depends on the reaction

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If an automobile air bag has a volume of 11.5 l , what mass of nan3 (in g. is required to fully inflate the air bag upon impact? assume stp conditions.

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Which of the following is not found in the nucleus of an atom? a. quark b. proton c. electron d. neutron

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The atomic mass is a measure of _____.protons plus neutronsatomic energycharge

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If the atomic weight of nitrogen is 14.0, what is the mass of one mole of nitrogen gas (n2)?

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How many o atoms are present in 1.04 mol of mgso4??

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Atoms of the same element that different in the number of neutrons are classified as

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How is the mass of a liquid substance affected after it freezes?

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Gravity is a force between any two objects with mass. Why doesn’t a person feel a gravitational force between him/herself and another person? A) A person doesn’t exert a gravitational force. B) The two gravitational forces cancel each other out. C) The gravitational forces of people is so small it is overshadowed by that of Earth. D) There are so many people we are actually balanced by all the different gravitational forces.

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If 12.6 grams of iron (III) oxide react with 9.65 grams of carbon monoxide to produce 7.23 g of pure iron, what are the theoretical yield and percent yield of this reaction? Be sure to show the work that you did to solve this problem. unbalanced equation: Fe2O3 + CO yields Fe + CO2

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A compound has 39 grams of potassium and 78 grams of selenium what is the mass ratio of potassium to selenium in the compound

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