Chemistry, 05.09.2020 01:01 erinolson07cats
Which of the following options correctly describe physical and chemical properties? A- A phase change always occurs when a physical property is measured B- When a chemical property is measured, the substance being observed is converted to a different substance or interacts with another substance. C- A chemical property of a substance can be observed without changing its composition or interacting with another substance. D- A physical property can be observed without a chemical reaction.
Answers: 3
Chemistry, 22.06.2019 05:00, foreignking02
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 07:10, jasondesatnick
An experimental procedure requires a 10 ml of acid to be dissolved
Answers: 2
Which of the following options correctly describe physical and chemical properties? A- A phase chang...
Mathematics, 12.05.2021 19:50
Biology, 12.05.2021 19:50
Physics, 12.05.2021 19:50
Mathematics, 12.05.2021 19:50