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Ugo [173]
3 years ago
10

1/ Which graph illustrates constant speed and velocity

Chemistry
1 answer:
Maksim231197 [3]3 years ago
4 0
Velocity is said to be constant if its magnitude as well direction at any instant is remains the same. In D, if you draw a line parallel to y-axis at any time t, you can see that velocity is same. Hence, D is the correct graph.

The kinetic energy of gaseous molecules is greater than that of liquid molecules. Therefore, in gas, kinetic energy overcomes the force of attraction between molecules. In short, in gas phase, particles move at high speed and hence they have less force of attraction. In case of liquid phase, particles are close enough as a result there is much more force of attraction compared to gaseous molecules. In liquid state, kinetic energy cannot overcome force of attraction therefore, liquid molecules slow down.

Therefore, B is the correct answer.
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A word which describes a solution which is more dilute than cytoplasm and would cause a cell to swell with water
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Answer:

A hypertonic solution has increased solute, and a net movement of water outside causing the cell to shrink. A hypotonic solution has decreased solute concentration, and a net movement of water inside the cell, causing swelling or breakage.

Explanation: hope this helps :) sorry if it's wrong :(

6 0
2 years ago
The number of protons in an atom is defined by it's
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The atomic number  defines the number of protons in an atom.

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3 years ago
Mixing sand and salt is it a chemical or physical change​
defon

Answer:

Mixing of salt is physical change.

Explanation:

Mixing of salt is physical change because no chemical reaction occur between them. Sand is non polar while salt is polar.

Physical Change:                                                                                              

The changes that occur only due to change in shape or form but their chemical or internal composition remain unchanged.

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

7 0
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Glven 4.62 mol of sodium hydroxide, NaOH, how many grams are present?
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Answer:

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Family: Lanthanides

5 0
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