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lbvjy [14]
3 years ago
12

What are the observable properties of salt and rocks, and explain how you used empirical evidence to explain that mixtures of so

lids can be separated based on the observable properties of their parts? plz, help!!! Don't answer with links and don't answer unless you know the answer.
Chemistry
1 answer:
777dan777 [17]3 years ago
6 0

Answer:

Appearance. Pure rock salt is colorless. However, when found underground it is generally not completely pure, so may have yellow, red, gray or brown hues. It is either transparent or translucent and when you shine a light on it, its luster is vitreous, meaning it appears shiny and glassy.

Explanation:

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Answer:

Explanation:X and Y

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2 years ago
Which of these is an example of a chemical change?
Lady_Fox [76]
The only one example of a chemical change would be:

B. Leaving cheese out to get moldy.

Because there is a chemical reaction.
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3 years ago
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Which one of the following is an alkane?<br><br> A. C2H4<br> B. C5H10<br> C. C3H8<br> D. C4H6
kondaur [170]
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Answer :

C. C3H8
3 0
3 years ago
A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/
Maksim231197 [3]

Answer:

The weight/weight % or percent by mass of the solute is 1.04g.mL

Explanation:

We assume, (i) that the solvent is water, and (ii) that dissolution occurs without change in volume.

So given the standard density of water, the mass of the solution is simply,

(4.87+86.4)g

For solution, \frac{mass}{volume}=density

                                = \frac{4.87+86.4g}{86.4mL}

                                = 1.04 g. mL

Because nitrate salts are soluble stuff, you could get significantly higher solution densities if you dissolved more salt (volume change would be fairly negligible).

7 0
3 years ago
32. A chemical reaction in which calcium carbonate CaCO3 is decomposed, results in the
pantera1 [17]

Answer:

Mass of calcium carbonate decompose 49g.

Explanation:

Given data:

Mass of CaO = 28.00 g

Mass of CO₂ = 21.97 g

Mass of calcium carbonate decompose = ?

Solution:

Chemical equation:

CaCO₃     →    CO₂ + CaO

Number of moles of  CO₂:

Number of moles = mass/molar mass

Number of moles = 21.97 g / 44 g/mol

Number of moles = 0.49 mol

Number of moles of  CaO:

Number of moles = mass/molar mass

Number of moles = 28.00 g / 56.1 g/mol

Number of moles = 0.49 mol

Now we will compare the moles of CaCO₃ with CaO and CO₂ .

                                CO₂                 :           CaCO₃

                                   1                    :             1

                                 0.49                :            0.49

                                 CaO                :           CaCO₃  

                                    1                    :             1

                                  0.49                :            0.49

Mass of CaCO₃ decompose:

Mass = number of moles × molaer mass

Mass = 0.49 mol × 100.1 g/mol

Mass = 49 g

7 0
3 years ago
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