The components in a mixture do not combine chemically true or false?

Answers

Answer 1

Answer: True
A mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combine chemically, so they retain their physical properties

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This is an interaction in which two waves meet, matching crest to crest and trough to trough. The resultant wave will have an amplitude of the sum of the two.

Answers

I'm Osei George the answer is interference

Answer:deferehug

Explanation:

12.42 m +421.0 m + 9.28 m -

Answers

Answer:

442.7m

Explanation:

12.42m+421.0m+9.28

442.7m

Which process requires an external power source?(1) neutralization (3) fermentation(2) synthesis (4) electrolysis

Answers

Answer:

The correct answer is option (4).

Explanation:

Electrolysis it is chemical technique used to separate out the constituent of solution by passing an electricity through it. Electricity is supplied to the solution is done by the external power sources.

For example:

$2H_2O(l)\overset{electricty}\rightarrow 2H_2(g)+O_2(g)$

Neutralization is the type of chemical reaction which an acid reacts with base along with the formation of water molecule and salt.

$HA+BOH\rightarrow AB+H_2O$

Fermentation is chemical reaction in which substance is break down into simpler compounds by the action of microorganism.Generally sugar or carbohydrates are broken down into alcohols or acids.

Synthesis is chemical reaction which two or more simpler compounds fused to together to give a single new compound.

(4) electrolysis requires an external power source

The calculation of quantities in chemical equations are called...

Answers

The calculation of quantities in chemical equations are called Stoichiometry. Stoichiometry is a branch of chemistry which deals with relative quantities of reactants and products in chemical reactions. The correct answer is 'Stoichoimetry'. I hope this helps you.

Which will boil faster distilled water or salt water and why?

Answers

Answer:

The distilled water will be boiled faster as it does not contain any non - volatile solute.

- The salty water contains different non - volatile salts in it.

- Due to the presence of these salts, its vapour pressure will be decreased and boiling point will be elevated.

- So, salty water will take more time to boil.

- On the other hand, distilled water does not have any such solute and due to this its vapour pressure will not be affected.

- Hence, it will boil fast than salty water.

Why for thousand of years people believed that stars moved across earth sky

Answers

Because the earth rotates. and the stars and constellations are in their exact same spots in the universe. its the same as the sun. some people can argue that the sun moves east to west, but in reality, its because the earth is rotating. :)

btw, this is more like an earth science question, not chemistry.

Because they did not have the proper technology. Hope my answer was useful.

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