Answers: 2
Chemistry, 22.06.2019 05:30
According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc
Answers: 3
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 20:00
Glucose (c6h12o6) is an important biological molecule. (round the answer to nearest hundredth.) what is the percent by mass of carbon in glucose?
Answers: 2
Chemistry, 23.06.2019 01:30
Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity
Answers: 2
How to Balance La2O3 + H2O and La(OH)...
Health, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Arts, 24.09.2020 09:01
Mathematics, 24.09.2020 09:01
Chemistry, 24.09.2020 09:01