Chemistry, 30.03.2021 02:20, happysage12
A sample of iron (III) oxide has 5.34 mols. What is the mass of the sample ?
Answers: 3
Chemistry, 21.06.2019 21:00, sophiapknight
Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle
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
A sample of iron (III) oxide has 5.34 mols. What is the mass of the sample ?...
English, 07.07.2019 23:30
History, 07.07.2019 23:30
History, 07.07.2019 23:30
Health, 07.07.2019 23:30
Mathematics, 07.07.2019 23:30
English, 07.07.2019 23:30
Arts, 07.07.2019 23:30
Business, 07.07.2019 23:30