Chemistry Questions

Which step would help a student find the molecular formula of a compound from the empirical formula?
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Which compound is insoluble in water?(1) KOH (3) Na3PO4(2) NH4Cl (4) PbSO4
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How do you know when the reaction between baking soda and an acid ingredient has ended
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Which of the following conditions would most likely affect the rate of a chemical reaction? A. Increasing the number of reaction steps B. Decreasing the size of the reaction vessel C. Decreasing the amount of air in the reaction vessel D. Increasing the concentration of reactants
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Other planets have an atmosphere, but Earth's is unique because it has large amounts of _____.nitrogenoxygenwater vapor
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Prehistory can be described as _____.what happened last yearwhat happened millions of years agothe time prior to the use of written records
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The digestion process starts in the _____.esophagusstomachsmall intestinemouth
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A pH of 2 indicates a(n) _____.
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Explain the function of ribosomes and why cells need them
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If solving for the slope of the best fit line it is a good choice to choose the points on the line.TrueFalse
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The mass in a chemical reaction is found in
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Increasing the intensity and duration of an exercise program too quickly can lead to injury.
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The Dome of the Rock and Al-Aqsa Mosque are located in what city?JerusalemCairoDamascusBaghdad
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A person makes a 400 dollar deposit in a bank account in January. By December, the value of that deposit willA. be three hundred dollars.B. actually double.C. remain the same, plus interest.D. be two hundred dollars.
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Henri Becquerel discovered radium and polonium.Please select the best answer from the choices providedTF
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Which of the following instruments is used to measure air pressure? A. AnemometerB. ThermometerC. BarometerD. Hygrometer
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When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although several elements seemed out of order, later discoveries showed the order to be correct. Which event most likely helped the development of the periodic table?
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Is freezing water a physical or chemical change
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