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Rzqust [24]
3 years ago
11

Explain the difference in appearance between a pure substance and a mixture

Chemistry
1 answer:
frosja888 [35]3 years ago
6 0
1) Mix can be divided on components using physical methods like filtration, of evaporation, or distillation and so on. But substance cannot.
2) Substance contains only one kind of the molecules (particles) , but mix can contain several kinds of molecules.
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Mannitol salt agar is defined as both a selective and a differential agar since it selects against non-halophiles and allows the
viktelen [127]

Answer: The above statement is true

Explanation:

Mannitol salt agar is a medium which contain high concentration of salt,about 7.5%-10%. It is commonly used as a selective and differential growth medium.Because of its high concentration of salt,it inhibits growth if non halophiles(as they only grow best in media containing less tha 0.2M salts). If the bacteria can ferment mannitol,an acidic byproduct is formed which turns phenol red agar into yellow.So only those bacteria grow well which can ferment mannitol.

8 0
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Match each renewable energy source with the correct description. solar cell converts sunlight into electricity geothermal energy
natka813 [3]

Answer:

Explanation:

solar cell - converts sunlight into electricity

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2 years ago
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Answer:

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5 0
2 years ago
When 250 ml of water is added to 35 ml of 0.2 M HCl
Paladinen [302]
Assuming that you’re looking for the concentration of water in the solution, then it would be 0.028 M.

You would have to use the formula:
c1v1 = c2v2, where c =concentration and
v = volume

C1 = ?
V1 = 250 mL
C2 = 0.2 M
V2 = 35 mL

C1 x 250 mL = 0.2 M x 35 mL

C1 = (0.2 M x 35 mL) / 250 mL

C1 = 0.028 M of water added to 35mL of 0.2M HCl

Therefore, there is 0.028 M of water added to 35mL of 0.2M HCl
8 0
3 years ago
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