Chemistry, 12.12.2020 17:00 pheonixhowls
What is the speed of light of an orange light with a wavelength of 600nm and a frequency of 5.00x1014?
Answers: 1
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 12:00
Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.
Answers: 3
Chemistry, 23.06.2019 07:30
Can you guys answer these questions i need it before 1: 00pm
Answers: 3
What is the speed of light of an orange light with a wavelength of 600nm and a frequency of 5.00x101...
Mathematics, 23.01.2021 03:00
Mathematics, 23.01.2021 03:00
Mathematics, 23.01.2021 03:00
English, 23.01.2021 03:00
Mathematics, 23.01.2021 03:00
Mathematics, 23.01.2021 03:00
Mathematics, 23.01.2021 03:00
English, 23.01.2021 03:10
SAT, 23.01.2021 03:10
History, 23.01.2021 03:10