Chemistry, 03.07.2019 00:00 hardwick744
This element is found in period 2, group 15. this nonmetal is the fifth most abundant element in the universe and makes up 78% of earth’s atmosphere. what is the atomic number and name of this element? *
Answers: 1
Chemistry, 21.06.2019 13:10
How many grams of naoh are needed to make 0.250 liter of a 0.500 m solution of naoh? 0.125 g 5.00 g 2.00 g
Answers: 1
Chemistry, 22.06.2019 09:00
What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.
Answers: 1
Chemistry, 22.06.2019 10:30
Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space
Answers: 2
Chemistry, 22.06.2019 23:30
What are the similarities between compounds and mixtures?
Answers: 3
This element is found in period 2, group 15. this nonmetal is the fifth most abundant element in the...
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