Suppose the innermost orbit an electron can occupy has an energy level of - 19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4?

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What mass, in grams, of aluminum hydroxide will be required to prepare the 4 L of a 1.75 M solution?

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What is the percent magnesium in a sample made of 24g Mg and 70gCl?

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A chemist has dissolved a certain substance in water. The chemist knows that more of the substance could be dissolved into the water before it stops dissolving. Therefore, the current solution is

Which of these particles is the smallest? A. an atom B. a nucleus C. a proton D. an electron

In a five-fold serial dilution of a 20 pg/ml solution, all tube dilutions are 1/5. What is the substance concentration in the third tube of this series?

Which of the following substances is never a Brønsted-Lowry base in an aqueous solution? Group of answer choicespotassium hydroxide, KOHsodium hydrogen phosphate, Na2HPO4sodium phosphate, Na3PO4ammonium chloride, NH4Clsodium bicarbonate, NaHCO3