Chemistry Questions

In an energy diagram, the reactants are at a higher potential energy compared to the products. Which of the following best describes this reaction?A) It is endothermic and will have a positive enthalpy.B) It is endothermic and will have a negative enthalpyC) It is exothermic and will have a positive enthalpy.D) It is exothermic and will have a negative enthalpy.
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From which layer of the atmosphere do particles of air escape into space?will give brainly
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If x is 5, then 6x = ___.3030x5x
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As ocean depth increases, _____. temperature increases density decreases salinity increases pressure decreases
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Where are alkaline earth metals found on the periodic table
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Which balloon is heavier, inflated or deflated
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Which is evidence that a chemical Reagan occurred?A. A phase change occurs B. A new gas is observed in the form of bubbles C. Red and yellow paint mixing to make orange D. The temperature of the substance remains constant updates
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Water can dissolve other substances. Which factor best contributes to this property of water?A. Water is made up of ionic bonds.B. Water has weak intermolecular forces.C. Water is denser than most substances.D. Water particles are not fixed in place.
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What causes some materials to have magnetic fields?
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The metric unit of force is theA. newton.B. kilogram.C. gram.D. nanometer.
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Classify wine and beef stew as homogeneous or heterogeneous.
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The movement of organisms into a range is called A. immigration. B. emigration. C. population shift. D. carrying capacity.
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What color represents the highest elevation
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Which substance cannot be broken down by a chemical change?1) ammonia2) ethanol3) propanol4) zirconium
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Which quantity identifies an element?1. Atomic number 2. Mass Number3. total number of neutrons in an atom of the element 4. total number of valence electrons in an atom of the element
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In a play, the rising action consists of the events that lead up to the a. last line in the sceneb. climaxc. external conflictd. internal conflict
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Why does a catalyst work for a long time before it needs replacing?
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Why does sodium form a 1+ ion but magnesium forms a 2+ ion
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