Chemistry, 01.03.2021 20:20, shealwaysknows23
DE ACUERDO A LA SIGUIENTE ECUACIÓN, DEMUESTRE QUE SE CUMPLE LA LEY DE LA CONSERVACIÓN DE LA MASA (incorpora los cálculos) 2 H2O2 (ac)- > 2H2O (ac) + O2 (g)
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Chemistry, 22.06.2019 05:30, medlinalex
Compare and contrast physical changes with chemical changes.
Answers: 1
Chemistry, 22.06.2019 10:00, zionlopez543
Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.
Answers: 1
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, 22.06.2019 13:00, yaneiryx5476
Is 9 correct? and can someone me with 10? it’s due tomorrow, you
Answers: 1
DE ACUERDO A LA SIGUIENTE ECUACIÓN, DEMUESTRE QUE SE CUMPLE LA LEY DE LA CONSERVACIÓN DE LA MASA (in...
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