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Soloha48 [4]
3 years ago
9

How is an element different than a compound? Give an example of each

Chemistry
2 answers:
Firdavs [7]3 years ago
7 0

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom.

AlexFokin [52]3 years ago
4 0

Answer:

compound is made up of 2 or more elements, while element is just pure element

a simple example would be that 2 is an element while 2+3 is a compound

or O(oxygen) is an element  while CO2 (carbon dioxide) is a compound

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Which statements correctly describe light (Select all that apply)
egoroff_w [7]

Answer:

The correct answers are C and D.

6 0
3 years ago
Solid calcium carbonate (CaCO3) reacts with hydrochloric acid (HCI) to form carbon dioxide, water, and
Pavlova-9 [17]

Using a more concentrated HCl solution and Crushing the CaCO₃ into a fine powder makes the reaction to occur at a faster rate.

<u>Explanation:</u>

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(aq) + CO₂(g)

When calcium carbonate reacts with hydrochloric acid, it gives out carbon-dioxide in the form of bubbles and there is a formation of calcium chloride in aqueous medium.

The rate of the reaction can be increased by

  • Using a more concentrated HCl solution
  • Crushing the CaCO₃ into a fine powder

When concentrated acid is used instead of dilute acid then the reaction will occur at a faster rate.

When CaCO₃ is crushed into a fine powder then the surface area will increases thereby increasing the rate of the reaction.

3 0
3 years ago
Read 2 more answers
Consider the burning of gasoline and the evaporation of gasoline. which process represents a chemical change and which represent
mart [117]
Burning gas is a chemical change and evaporation of gas is physical change.
5 0
3 years ago
How does the acid level in a lake affect how many fish live there?
nikklg [1K]

If the level of acid in a lake increased, then the number of fish that live there will be decreased because highly acidic lakes will not have enough food for the fish to survive. Acidic level increases , then availability of food for fish decreases as some food will be contaminated so if the fish won't got enough food for their survival then their number of fish decreases.

3 0
3 years ago
In order for a circuit work there can be no _______ within the circuit?
Luden [163]
I’m not very good at this subject, however I have a idea of what it could be but if wrong My apologies “ Placed wires “.

Have a blessed day and God bless.
8 0
2 years ago
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