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mixas84 [53]
2 years ago
10

Is food coloring dissolving in water a chemical change

Chemistry
2 answers:
zubka84 [21]2 years ago
6 0
Answer: There no chemical change, but there is a physical change.


Reason: When a substance dissolves in water, the substance retains its molecular identity and simply mixes throughout the water
GarryVolchara [31]2 years ago
5 0
No it is still the same element
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Convert 175 g of H,O into moles.
devlian [24]

Answer:

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3 years ago
Carbon dioxide (CO2) is a gaseous compound. Calculate the percent composition of this compound. Answer using three significant f
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Carbon dioxide is a gaseous molecule made up of the elements, C and O. Each mole of carbon dioxide has one mole C and two mole oxygen atoms.

Molar mass of carbon dioxide (CO_{2})=(1 * 12.01\frac{g}{mol}) +(2* 16\frac{g}{mol})=44.01\frac{g}{mol}

Percentage by mass of carbon = \frac{(1*12.01\frac{g}{mol}) }{44.01\frac{g}{mol} } *100=27.3%

Percentage by mass of oxygen = \frac{(2*16\frac{g}{mol})}{44.01\frac{g}{mol} } *100=72.7%

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7 0
3 years ago
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Select all the correct answers.
pantera1 [17]

Answer:

B:  Fission reactors generate huge amounts of heat.

C:  Fission breaks down unstable elements such as uranium in a breeder                         reactor which is broken down in the process of fusion which is literally breaking down of elements.

E: fission is used in nuclear weapons as it is easier to accomplish then fusion  bombs

Explanation:

A: as a zero-waste energy source

B: for generating large amounts of heat

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D: for creating new, heavier elements

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4 0
3 years ago
How many grams of MgCl2 (molar mass = 95.20 g/mol) will be formed from 25.6 mL of a 0.100 M HCL solution reacting with excess ma
lorasvet [3.4K]
The balanced equation for the above reaction is as follows;
Mg + 2HCl ---> MgCl₂ + H₂
stoichiometry of HCl to MgCl₂ is 2:1
we have been told that Mg is in excess therefore HCl is the limiting reactant 
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mass of MgCl formed - 0.00128 mol x 95.20 g/mol = 0.122 g
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2 years ago
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3 years ago
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