Chemistry, 28.07.2019 13:00 haleyzoey7
Aneutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and electrons are found within the atom? a) 21 protons, 21 electrons, and 20 neutrons b) 20 protons, 20 electrons, and 21 neutrons c) 21 protons, 20 electrons, and 20 neutrons d) 41 protons, 41 electrons, and 20 neutrons
Answers: 1
Chemistry, 22.06.2019 12:00
In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =
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Chemistry, 22.06.2019 13:30
Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?
Answers: 1
Chemistry, 22.06.2019 14:10
Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?
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Chemistry, 22.06.2019 23:30
The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth
Answers: 1
Aneutral atom has an atomic number of 20 and a mass number of 41; how many protons, neutrons, and e...
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