subject
Chemistry, 09.12.2020 08:30 lumikuz123

15. How can a pure sample of barium sulphate be obtained from barium carbonate? A. Dissolve barium carbonate in dilute hydrochloric acid, followed by dilute
sulphuric acid, then filter and crystallise.

B. Dissolve barium carbonate in dilute hydrochloric acid, followed by dilute
sulphuric acid, then filter and rinse.

C. Dissolve barium carbonate in water, followed by dilute sulphuric acid, then filter
and crystallise.

D. Dissolve barium carbonate in water, followed by dilute sulphuric acid, then filter
and rinse.

ansver
Answers: 3

Another question on Chemistry

question
Chemistry, 22.06.2019 05:30
Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *
Answers: 1
question
Chemistry, 22.06.2019 10:50
8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
Answers: 1
question
Chemistry, 22.06.2019 14:30
Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.
Answers: 1
question
Chemistry, 22.06.2019 16:00
Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance
Answers: 2
You know the right answer?
15. How can a pure sample of barium sulphate be obtained from barium carbonate? A. Dissolve barium...
Questions
question
Mathematics, 22.12.2020 06:30
question
Mathematics, 22.12.2020 06:30
question
Mathematics, 22.12.2020 06:30
Questions on the website: 13722362