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3 years ago

What do these two changes have in common?

1 answer:

7 0

Building a tower out of magnetic blocks and water vapor condensing on a bathroom mirror are only physical changes.

A physical change is easily reversible. It does not involve a change in the composition of a substance.

A tower built out of magnetic blocks can easily be pulled apart and water that condensed on a bathroom mirror can easily change back to vapour by heating.

All these are possible because the both processes are only physical changes.

Learn more: brainly.com/question/6284546

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Why do your body and your cells need water?

Black_prince [1.1K]

Explanation:

Water the essential constituent of protoplasm of living cells because it is directly involved in countless biochemical reactions like photosynthesis and respiration without it cells couldn't move waste and by-products taking nutrients perform intracellular Transportation functioning and signaling

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3 years ago

A water molecule is made of hydrogen and oxygen atoms and has the same formula is H2O how was the mixture of hydrogen oxygen dif

maksim [4K]

A mixture of hydrogen and oxygen would not need to have a certain ratio of hydrogen atoms to oxygen atoms to differ from the compound known as water.

<h3>Why is water a compound not a mixture?</h3>

A water molecule has 2 hydrogen atoms bonded chemically to oxygen atoms and has the formula H₂O.

In a chemical reaction, two atoms react together chemically to form a new product which means the reactants lose their individual properties and obtain new properties of the product formed.

Hence, water is a compound as hydrogen and oxygen atoms are bonded chemically to each other.

On the other hand, if oxygen and hydrogen form a mixture which is a physical change then they retain their individual properties in the mixture. They do not need to be in a specific ratio and there are no chemical changes taking place.

Chemical change determines if a substance is a mixture or a compound.

Thus, a mixture of hydrogen and oxygen is different from water if it doesn't have a certain ratio of hydrogen atoms to oxygen atoms.

Learn more about mixture:

brainly.com/question/24647756

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2 years ago

Consider the dissolution of MnS in water (Ksp = 3.0 × 10–14). MnS(s) + H2O(l) Mn2+(aq) + HS–(aq) + OH–(aq) How is the solubility

Mademuasel [1]

Answer:

The solubility of MnS will decrease on addition of KOH solution.

Explanation:

As per the equation given:

$MnS(s)+H_{2}O(l) -->Mn^{+2}(aq)+HS^{-}(aq)+OH^{-}(aq)$

On dissolution of MnS in water it gives a basic solution as it gives hydroxide ions.

Now when the we are adding aqueous KOH solution, it will dissociate as:

$KOH(aq)--->K^{+}(aq)+OH^{-}(aq)$

Thus it will further furnish more hydroxide ion,

This will increase the concentration of hydroxide ions (present of product side), the system will try to decrease its concentration by shifting towards reactant side.

Thus the solubility of MnS will decrease on addition of KOH solution.

7 0

3 years ago

What are atoms?

snow_lady [41]

Answer:

a. tiny particles that make up all matter

6 0

3 years ago

Read 2 more answers

In a recent Grand Prix, the winner completed the race with an average speed of 299.8 km/h. What was his speed in miles per hour,

scoundrel [369]