Chemistry Questions

What does Vitamin D do for the body?A. It transports oxygen to the muscles.B. It converts glucose into energy.C. It controls the way your body uses calcium.D. It effectively rehydrates the system
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Number of CO2 molecules in 0.0180 mol CO2
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is it possible for a cup of tea and tea pot that is full of tea to have the same thermal energy? explain
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What type of solution is formed when steam from boiling water evaporates into the air
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True or false when elements chemically combine they usually form compounds that have properties that are similar to those of the uncombined elements
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How does Silicon shape our technological reality
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Which is a molecule?A. NeB. NaCLC. Trail MixD. graphene
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The particle that is identical to a high energy electron is known as a(n) _____. alpha particle, beta particle, gamma ray
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What is the molar mass of a substance
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A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?
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If you eat foods that are compact and _______, more can fit into your stomach with less discomfort.A. denseB. dryC. puffedD. tasty
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Which is the best metal to use in an alloy to increase its electrical conductivity?A) AlB) CuC) Fe D) Sb
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A chemical reaction in which compounds break up into simpler constituents is a _______ reaction.a. combinationb. decompositionc. double replacementd. substitution
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What particle is emitted in alpha radiation
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One major goal of the Progressive movementwas to(1) balance the federal budget by decreasingspending(2) provide unemployment insurance to workers(3) limit direct citizen control over government(4) pass laws to help solve economic and socialproblems
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1 Which best defines concentration?A ratio that describes the amount of solute divided by the amount of solvent or solutionB ratio that describes the amount of solvent or solution divided by the amount of solute C ratio that describes the mass of solute divided by the mass of solvent D ratio that describes the amount of solvent in a solution 2 Which contributes to the dissolution of sugar in water?A the dissociation of an ionic compound in waterB a strong pull of water molecules on an ionic compoundC the dissociation of a polar covalent compound in waterD a strong pull of water molecules on a polar covalent compound
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What is the mass of a neutron?
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When nickel combines with fluorine to form nickel (III) fluoride, the charge of the nickel ion isa. Ni1+.c. Ni3+.b. Ni2+.d. Ni4+.
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