Which describes the enthalpy change associated with an endothermic reaction? a) it is negative because the enthalpy of the products is greater than the enthalpy of the reactants. b) it is positive because the enthalpy of the products is greater than the enthalpy of the reactants. c) it is negative because the enthalpy of the reactants is greater than the enthalpy of the products. d) it is positive because the enthalpy of the reactants is greater than the enthalpy of the products.
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The molality of calcium chloride (cacl2) in an aqueous solution is 2.46 m. what is mole fraction of the solute?
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Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?
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F1.5 mol of nabh4 react, how many moles of b2h6 are formed? 2 nabh4(aq) + h2so4(aq) → 2 h2(g) + na2so4(aq) + b2h6(g)
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Chemistry, 23.06.2019 11:40
Which of the following observations indicates that an atom has neutrons? some uncharged particles are scattered by a beryllium atom when it hits a gold foil. some uncharged particles bounce back from a gold foil when it is bombarded with alpha particles. a radiation consisting of uncharged particles is emitted when alpha particles strike beryllium atoms. a radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.
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Which describes the enthalpy change associated with an endothermic reaction? a) it is negative bec...
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