subject
Chemistry, 23.09.2019 14:30 rivermadds4163

The hardest known mineral is
topaz
talc
diamond
graphite

ansver
Answers: 2

Another question on Chemistry

question
Chemistry, 22.06.2019 01:20
1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.
Answers: 2
question
Chemistry, 22.06.2019 02:30
Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass
Answers: 3
question
Chemistry, 22.06.2019 02:30
24 points and brainliest to anyone who can answer under 10 minutes with best ! the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.
Answers: 1
question
Chemistry, 23.06.2019 04:10
What does the field of thermodynamics relate to a-changes in nuclear reactions b- changes in energy in systems c changes in molecular structure d changes in atomic properties
Answers: 1
You know the right answer?
The hardest known mineral is
topaz
talc
diamond
graphite...
Questions
question
English, 29.09.2021 03:10
question
Mathematics, 29.09.2021 03:10
question
Chemistry, 29.09.2021 03:10
question
Biology, 29.09.2021 03:10
question
Social Studies, 29.09.2021 03:10
question
History, 29.09.2021 03:10
Questions on the website: 13722360