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Chemistry, 22.06.2019 08:40
What is the value of keq for the reaction expressed in scientific notation?
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Chemistry, 22.06.2019 09:30
Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles
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Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
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Chemistry, 22.06.2019 12:00
From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor
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What is the volume of a gas at STP if it originally was at a volume of 94.7 La temperature of 23.0°C...
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