Chemistry, 19.09.2019 02:10 rerunkle96
Minerals are very useful to us. which of the following is a false statement? question options: pyrite is an ore of gold and is used in jewelry making. talc is used in paper making, plastics, and paint. quartz is used to make glass. cobalt is not used in medicine.
Answers: 1
Chemistry, 22.06.2019 05:00
1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false
Answers: 3
Chemistry, 22.06.2019 12:00
1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c
Answers: 2
Chemistry, 22.06.2019 14:30
Which of the following describes a situation where competition between producers exists
Answers: 1
Chemistry, 22.06.2019 18:10
Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate
Answers: 1
Minerals are very useful to us. which of the following is a false statement? question options: pyr...
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