Chemistry, 01.10.2019 03:20 deeoki3384
Which of the following are redox reactions? p4(s)+10hclo(aq)+6h2o(l)→4h3po4(aq) +10hcl(aq) br2(l)+2k(s)→2kbr(s) ch3ch2oh(l)+3o2(g)→3h2o(l)+2co2(g) zncl2(aq)+2naoh(aq)→zn(oh)2(s)+2nac l(aq) for those reactions that are redox, indicate which elements are oxidized.
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Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation
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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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The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397
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Which of the following are redox reactions? p4(s)+10hclo(aq)+6h2o(l)→4h3po4(aq) +10hcl(aq) br2(l)+2...
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