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77julia77 [94]
3 years ago
9

When a drawing made with a black marker gets wet, the marker bleeds and more separates into several colors. What method of separ

ation does this describe?
Chemistry
2 answers:
Mnenie [13.5K]3 years ago
8 0
This example is describing the Chromatography method. 
Firdavs [7]3 years ago
3 0
Chromatography is the answer i am am positive
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Which of the following is an example of a chemical change? Group of answer choices aftershave or perfume on your skin evaporatin
Bingel [31]

Answer:

Gasoline being used in the engine of a car producing exhaust

Explanation:

Hello,

As it is known, gasoline is the component which car engines use to gain energy in order to allow the movement, in such a way, gasoline experiences a combustion chemical reaction, which is a chemical change, induced by the spark that the oxygen provides to allow the combustion. Such chemical process turns both gasoline and oxygen into carbon, nitrogen and sulfur oxides, water, ashes, other side products and the aforesaid energy to move the car.

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3 0
2 years ago
What are the major reservoirs for sulfur
lapo4ka [179]

Answer:

the ocean, the ocean floor basalts, evaporite deposits and reduced marine sediments.

Explanation:

7 0
2 years ago
Morgan did an experiment to see the effect of water temperature on the rate at which sugar dissolves. She placed a sugar cube in
Dominik [7]

Answer:

B is correct → since temperature can be measured confidently and the variations with temperature are greater ( then the errors in measuring time diminishes)

Explanation:

A is not correct → since the sugar cubes will be still surrounded by water at the temperature chosen regardless of the size of the glass, organising the data by size of the glass is not correct since the glass size does not affect in a significant way to the results ( it could affect the cooling rate of water due to the exposed surface , it but would be insignificant)  

C is not correct → since the sugar cubes are approximately of the same size , putting 2 cubes or "n" cubes will not affect the time significantly since each cube is still surrounded by water at the same temperature and behaves independently from others , then each cube dissolves at the same time ( there would be small variations due to the different sizes of the cubes and the small variation due to the limited mass of water)

D is not correct → since the solubility of sugar in water is high , the amount left after the experiment would be very small ( thus the relative errors are high) and the sugar would be contaminated with water in the weighting operation, leading to more errors

B is correct → since temperature can be measured confidently and the variations with temperature are greater ( then the errors in measuring time diminishes)

7 0
2 years ago
Read 2 more answers
A. How many hydrogen atoms are on the Reactants side?
patriot [66]
The reactants side are the first ones in a chemical reaction. 
8 0
3 years ago
The pH of a solution of a is increased from 2 to 3 then the concentration of h + ions will become​
Tpy6a [65]

Answer:

The H+ concentration would decrease by 10 fold. From .01 to .001

Explanation:

This is due to how a pH of 2 is expressed in scientific notation as 10^-2 power when referring to H+ concentration so a pH of 3 would be 10^-3. Hence it would be 10 times smaller in concentration as the power increases to the negative power the smaller the concentration becomes.

3 0
3 years ago
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