Answers: 3
Chemistry, 23.06.2019 07:00, jboii11
An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o
Answers: 2
Chemistry, 23.06.2019 21:30, ashhuizing
Which particles make up the nucleus of an atom? a. protons and electrons b. neutrons and electrons c. protons only d. protons and neutrons e. neutrons only
Answers: 2
An electron moves along the z-axis with vz=3. 0×107m/svz=3. 0×107m/s. As it passes the origin, what...
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