Twenty students were surveyed to find out how
many hours of TV they watch during a school
we...
Answers: 3
Chemistry, 21.06.2019 20:30
The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?
Answers: 2
Chemistry, 21.06.2019 22:20
Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?
Answers: 2
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 05:50
Why doesn't heat added to water make the tempature rise above 100c
Answers: 2
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00
Biology, 30.06.2019 03:00
Mathematics, 30.06.2019 03:00