Perform the following operation
and express the answer in
scientific notation.
7.09x10^...
Chemistry, 10.10.2020 14:01 jasminelynn135owmyj1
Perform the following operation
and express the answer in
scientific notation.
7.09x10^5 – 6.10x10^4
[? ]x10^[?]
Answers: 2
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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
Answers: 2
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Ill give brainiestif one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated? if each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron? how many neutrons in total were produced by the two fission events described?
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Which statement best describes the flow of energy in this scenario
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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.)
Answers: 1
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