Chemistry, 09.12.2021 07:20, rosepederson80
A plant uses the energy from sunlight to create oxygen and glucose from carbon dioxide and water which statement is true about the changes that have occurred
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Chemistry, 22.06.2019 11:40, Wemaybewrong
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.)
Answers: 1
Chemistry, 23.06.2019 00:30, zaniathomasel
What is bromine+calcium iodide--> calcium bromide +iodine balanced
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Chemistry, 23.06.2019 08:00, mantha0402
Can anyone answer these questions? ? i need it before 1: 00pm today
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Chemistry, 23.06.2019 09:40, ventalexander8406
Write balanced nuclear equations for the formation of five elements whose atomic number is between helium (2) and iron (26):
Answers: 1
A plant uses the energy from sunlight to create oxygen and glucose from carbon dioxide and water whi...
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