Master Chemistry with Fun Quizzes & Brain Teasers!

The momentum of a 23 000 kg truck traveling eastward with a velocity of 50.0 m/s is kom/s
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7th GRADE SCIENCE FIRDT PERSON MARKED BRAINLIEST A generator is used to convert ________ energy into ______ energy
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The orbital diagram shows the valence electrons of sulfur, which has 16 electrons. If the electrons were added to the atom one at a time, which would be the last electron to occupy an orbital?
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Science...............
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How would you classify a creepycrawly with no vertebrae and morethan 6 jointed legs?Rileachs. snakeT. spiderv.cockroach
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Which of the following is considered a sign of a chemical change?
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If a central atom of a molecule only has two electron domains, what is the bond angle associated with the molecule? 120o180o90o109.5o
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20 POINTS PLEASE ANSWER ASAP!!!! Why is calcium (Ca) in group 2, period 4 on the periodic table? A Calcium, like all group 2 elements, is nonreactive and a gas at room temperature. B Calcium, like all period 4 elements, is nonreactive and a gas at room temperature, C Calcium, like all group 2 elements, is reactive and a solid at room temperature. D. Calcium, like all period 4 elements, is reactive and a solid at room temperature.
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HELP FAST PLZ!!!!! Which phase change allows a substance to transform from a liquid to agas?meltingOfreezingO ionizationcondensationdeionizationOevaporationsublimation
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1. Properties that do not depend on the amount of matter present are... ????*Extrinsic PropertiesChemical PropertiesIntrinsic Propertiesi
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Help plz (will mark brainleist)
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Group the labels according to the type of waves they describe.
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I NEED THESE ANSWERED!!! PLEASEEE!!!!!
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How many minutes are In 3,417 seconds?
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3. A substance which is made up of two are more differentelements chemically combined is known as A. an atomB. a substanceC. a compoundD. a molecule
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Which statement accurately describes an object's weight and mass?A. Its mass changes with gravitational force, but its weight does not.B. Both its weight and its mass are the same everywhere in theuniverse.OC. Its weight is the same everywhere in the universe, but its mass isnot.O D. Its weight changes with gravitational force, but its mass does not.
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Sort the characteristics into those which are true of bryophytes and those which are true of modern land plants. Drag each item to the correct location.
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explain the difference in behavior between water and the buffer with addition of acid or base. are your results as expected? why or why?
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the half-life of plutonium-234 is 9 hours. if 80 milligrams is present now, how much will be present in 3 days?
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a 25.00 ml sample of hydrochloric acid solutions requires 24.16 ml of 0.106 m sodium hydroxide for complete neutralization. what is the concentration of the original hydrochloric acid solution?
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calculate the volume in milliliters of a zinc nitrate solution that contains of zinc nitrate . round your answer to significant digits.
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what is the total random kinetic energy of all the molecules in one mole of hydrogen at a temperature of 300 k? (b) with what speed would a mole of hydrogen have to move so that the kinetic energy of the mass as a whole would be equal to the total random kinetic energy of its molecules?
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a 150- mgmg sample of technetium-99 mm is used for a diagnostic test. if technetium-99 mm has a half-life of 6.0 hh , how many milligrams of the technetium-99 mm sample remains active 18 hh after the test? express your answer to two significant figures and include the appropriate units.
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the half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. starting with grams of a radioactive isotope, how much will be left after half-lives? use the calculator provided and round your answer to the nearest gram.
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