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3 years ago

A mixture is -

1 answer:

4 0

<span>a. a chemical combination of two or more different materials.

For example: </span>For example, air is a mixture of gases, containing N, O, Ar, CO2

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If i mix ammonia and bleach what do i get.

Harlamova29_29 [7]

Answer:

Death

Explanation:

Just kidding but its a toxic gas that will lead to nausea and coughing.

5 0

3 years ago

MS (R) Science 7 Q3 20-21

dimulka [17.4K]

Answer:

Molecules are made of two or more atoms

Molecules are made of atoms of the same element or different elements.

Molecules range in size.

Explanation:

A molecule is formed whenever two or more atoms combine. Hence we can define a molecule as a combination of two or more elements that are combined chemically and can not be separated by any physical means.

Molecules may be composed of the same atoms as in O2, F2 etc or different atoms as in CO2, H2O, etc.

The sizes of molecules differ. Some molecules are quite small in size while others are quite large in size.

5 0

3 years ago

Read 2 more answers

The following models illustrate chemical reactions between X (red atoms) and Y (blue atoms). The "?" mark in each frame represen

Yuri [45]

The frames are shown below.

Answer:

Part 1: Starting material = 5X and 8Y, ? = 1X;

Part 2: Starting material = 4X₂ and 3Y₂, ? = 1X₂;

Part 3: Starting material = 4X₂ and 4Y₂, ? = 2X₂;

Part 4: Starting material = 2X₂ and 3Y₂X, ? = X.

Explanation:

Part 1

Each ball represents one atom, thus there are 5X and 8Y as starting materials. In the products there's 4X and 8Y forming 4 Y₂X, so ? = 1X.

Part 2

In this case, there are presented X₂ and Y₂ because the atoms are joined together, so the starting material is 4X₂ and 3Y₂. In the product, there are 6 YX, so it reacts 3X₂ and 3Y₂, and ? = 1 X₂.

Part 3

As in part 2 the atoms are joined together, so there are 4X₂ and 4Y₂. In the product, there are 4Y₂X, so it reacts 2X₂ and 4Y₂, so ? = 2X₂.

Part 4

The starting material now is 2X₂ and 3Y₂X, the product is 3Y₂X₂, so it reacts 3Y₂X and 3/2 X₂, thus ? = 1X.

6 0

3 years ago

Describe the molecular basis of the property of water responsible for the presence of ice on the surface of a frozen lake.

iogann1982 [59]

The molecular basis of the property of water responsible for the presence of ice on the surface of a frozen lake is Solid-phase water—ice—has an extraordinary property

Water has extremely strong hydrogen bonds with itself, which accounts for its high boiling and freezing points. However, in the liquid state, the arrangement of the molecules and hydrogen bonds is arbitrary. Because of the two oxygen lone pairs and the water's 104.5-degree H-O-H bond angle, the more structured array that forms when the molecules freeze places them farther apart than the random liquid. The resulting solid has a lower density because the molecules are more spaced apart than in a liquid.

Ice, a solid form of water, has the remarkable feature of being less dense than liquid water. Almost exclusively only water has a solid phase that floats on a liquid. Lakes and rivers are protected from the subzero winter air by frozen, floating water, which keeps them liquid and able to support life.

To learn more about water please visit
brainly.com/question/27897256
#SPJ4

4 0

2 years ago

After the phase change in the diagram below, the molecules will move...

nikklg [1K]

Answer:

C is the correct answer

I hope this helps you:)

Explanation:

C slower, and the substance will be a liquid

5 0

3 years ago