Chemistry, 09.07.2019 17:30 Loveraeee17
Asingle hydrogen atom has a mass of 1.67 × 10−24 g. a sodium atom has an atomic mass of 23. how many sodium atoms are required to reach a total mass of 973 mg in a substance of pure sodium?
Answers: 1
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Consider the elements bromine and chlorine; which elements has a larger ionic radius ?
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Chemistry, 22.06.2019 07:50
Which of the following electromagnetic waves can create ions?
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Chemistry, 22.06.2019 10:00
Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.
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
Asingle hydrogen atom has a mass of 1.67 × 10−24 g. a sodium atom has an atomic mass of 23. how many...
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