Chemistry, 28.10.2020 20:00 RegencySlayer5304
According to the reaction below, hydrogen gas is one substance produced as a result of the single replacement reaction that occurs when calcium and water react. If the reaction occurs at standard temperature and pressure conditions, how many liters of hydrogen gas will be produced when 8.08 x 10^23 molecules of water are reacted?
Answers: 2
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Identify the electromagnets with poles that are reversed from the electromagnet shown above
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How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?
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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.)
Answers: 1
Chemistry, 22.06.2019 12:00
Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon
Answers: 2
According to the reaction below, hydrogen gas is one substance produced as a result of the single re...
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