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kirill [66]
2 years ago
11

Determine if the following are examples of Elements, Compounds, or Mixtures Air

Chemistry
1 answer:
Alchen [17]2 years ago
7 0

Answer:

Mixture

Explanation:

Air is a mixture, meaning it can be separated into its components without a chemical reaction taking place. In this case, it is a mixture of gases.

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What experiment did J.J thomson do?
Fittoniya [83]

Answer: C

Explanation:

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3 years ago
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Procedure for the experiment.
Elis [28]

Answer:

A solid residue of limestone and some gypsum.

Explanation:

In step 2, some of the limestone and gypsum in the chalk dissolve in the water. When the mixture is filtered, the dissolved substances remain in the water. When the water is boiled off or evaporated, the solid substances remain behind.

5 0
3 years ago
A car travelling at a uniform speed of 100 kmh spends 15minutes moving from point A to point B along its route. the distance bet
gizmo_the_mogwai [7]

Answer:

25002m

Explanation:

V = 100 km/h

Converting to m/s, we have

V = (100 x 1000)/3600 = 27.78m/s

t = 15mins = 15 x 60 = 900secs

Displacement =?

Velocity = Displacement /Time

Displacement = Velocity x time

Displacement = 27.78 x 900

Displacement = 25002m

Since displacement and distance are measured in same unit, the distance between A and B is 25002m

7 0
3 years ago
Helpz me pleaz! I don't quite get it
harina [27]

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Al2O3

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Al2O3 has an ionic bond because the bonds between them are very strong

8 0
3 years ago
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Copper(II) sulfide, CuS, is used in the development of aniline black dye in textile printing. What is the maximum mass of CuS wh
IrinaK [193]

Explanation:

The chemical reaction equation will be as follows.

           CuCl_{2} + (NH_{4})_{2}S \rightarrow 2NH_{4}Cl + CuS

As 1 mole CuCl_{2} reacts with 1 mole of (NH_{4})_{2}S

Hence, moles of CuCl_{2} = Molarity × Volume (in mL)

                                              = 0.5 × 38.0 mL

                                              = 0.019 mol

Moles of (NH_{4})_{2}S = Molarity × Volume (in mL)

                                           = 0.6 × 42.0 mL

                                           = 0.0252 mol

As moles of CuS is less than the moles of (NH_{4})_{2}S. This means that CuS is the limiting reagent.

Thus, maximum moles of CuS formed are 0.019 mol. As molar mass of CuS is 95.6 g/mol.

Therefore, maximum mass of CuS can be formed is 95.6 g/mol \times 0.019 mol

                    = 1.8164 g

Thus, we can conclude that maximum mass of CuS formed is 1.8164 g.

6 0
3 years ago
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