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Chemistry, 22.06.2019 18:00
How many moles of oxygen gas are produced from the decomposition of six moles of potassium
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Chemistry, 23.06.2019 06:30
Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.
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Chemistry, 23.06.2019 07:00
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 11:30
Which of the following is a property of an acid solution? a. slippery to the touch b. ph less than 7 c. turns red litmus paper blue d. bitter taste
Answers: 1
Is pancake syrup a compound mixture or element ?...
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