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zaharov [31]
2 years ago
10

5. Which quantities must be conserved in all chemical reactions?

Chemistry
2 answers:
k0ka [10]2 years ago
4 0
In a chemical reaction, the mass and energy must be conserved, as it states in the law of conservation of mass and also energy. Matter cannot be created not destroyed. 
sergey [27]2 years ago
3 0
A force of attraction that holds atom together 
<span>When atoms react they form a chemical bond which is defined as a force of attraction that holds atom together. A force of attraction is defined as a kind of force that draws two or more objects together regardless of distance. There are two major categories of forces of attraction, one is intramolecular and intermolecular. Intramolecular forces is the presence of forces in atoms internally. While intermolecular is the force by which the force that is existent in two or more elements. </span>
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Which atom would form a cation?<br> F<br> Na<br> N<br> P
sineoko [7]

Answer:

I believe Na

Explanation:

Copper, because it is the only metal out of all of them.

Therefore copper is the only element that can loose electrons to have a positive charge, it is the most likely to become a cation.

5 0
3 years ago
When an electric current passes through water, _____ takes place, breaking down the compound into hydrogen and oxygen. a physica
PSYCHO15rus [73]
Electrolysis takes place when an electric current passes through water.
5 0
3 years ago
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19) The nuclear symbol of helium,
Amiraneli [1.4K]

Answer:

Alpha particle

Explanation:

The helium symbol is also used to represent he alpha particles.

For example:

The americium with atomic wight  224 undergo alpha decay and produce

₉₃Np²³⁷ . The alpha particle emitted is also called helium nuclei. During this decay some gamma radiations also produce as a byproduct.

₉₅Am²²⁴   →    ₉₃Np²³⁷ + ₂He⁴

Properties of alpha radiation:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number 4 less than and atomic number 2 less than the starting atom.

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

4 0
3 years ago
Which of the following is the best example of heat transfer by convection
Ugo [173]
B seems like the correct answer stay safe!
6 0
2 years ago
Tells how many of each atom there are in a formula
Sveta_85 [38]

Answer:

\large \boxed{\mathrm{subscripts}}

Explanation:

Subscripts are numbers written after elements, subscripts indicate how many of each atom there are in a compound.

8 0
3 years ago
Read 2 more answers
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