Chemistry, 26.09.2019 07:30 justincsh7238
Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? k zr ca sc
Answers: 2
Chemistry, 22.06.2019 23:30
The density of benzene at 15 °c is 0.8787 g/ml. calculate the mass of 0.1500 l of benzene at this temperature. enter your answer in terms of grams
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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
Chemistry, 23.06.2019 02:00
Which of the following substances is the most soluble in water? a. sodium chloride b. methane c. bromine d. carbon
Answers: 1
Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? k zr...
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