Chemistry, 26.02.2020 21:50 elijaahstepp041
1) An atom of nitrogen has 7 protons. How many protons does an atom of silicon have? 2) The element zinc (Zn) has an atomic number of 30. How many neurons does an atom of zinc contain?
Answers: 2
Chemistry, 21.06.2019 20:30
If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared
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Chemistry, 22.06.2019 11:00
An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it
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Chemistry, 22.06.2019 14:00
What mass of natural gas (ch4) must you burn to emit 276 kj of heat?
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Chemistry, 23.06.2019 00:40
To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.
Answers: 1
1) An atom of nitrogen has 7 protons. How many protons does an atom of silicon have? 2) The element...
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