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Aloiza [94]
3 years ago
6

Examples of physical and chemical weathering

Chemistry
1 answer:
lorasvet [3.4K]3 years ago
5 0
Mass is always conserved in a physical change. Energy may be released or absorbed when a substance changes from one physical state to another. In a chemical change, a chemical reaction yields a completely new substance. A substance's particles are changed during a chemical reaction.
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What is the mass of 4 moles of helium, He?
aniked [119]
I am pretty sure it is 4.002602
4 0
3 years ago
Write balanced equations for the following reactions
Arte-miy333 [17]

Answer:

See explanation

Explanation:

The shorthand nuclear reaction equations have been given; the first particle in the parentheses is a reactant particle while the second particle is a product particle. These can now be rewritten as the longhand equations as follows;

238/92U + 4/2 He -------> 241/94Pu + 1/0 n

238/92U + 4/2 He ------> 241/94Pu + 1/0 n

14/7N + 4/2 He------> 17/8O + 1/1 p

56/26Fe + 2 4/2 He----> 60/29Cu + 4/2 He

4 0
3 years ago
How many neutrinos does an element have if it's atomic number is 47 and it's mass number is 169
Stells [14]

This element would have 122 neutrons.

Atomic mass is the accumulation of neutrons and protons.

169 - 47 = 122.

Therefore, there are 122 neutrons.

7 0
3 years ago
The various atomic masses of the same element are called neutrino positron critical mass isotopes
Mariana [72]
The various atomic masses of the same element are called<u> isotopes</u>. They have the same number of protons but different number of neutrons.
3 0
3 years ago
Read 2 more answers
The hall reaction of an oxidation-reduction reaction shows that iron gains electrons. What does this electron gain mean for iron
AnnZ [28]

Answer: Iron gains electrons mean It is reduced

Explanation:

Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

Zn\rightarrow Zn^{2+}+2e^-

Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

Fe^{2+}+2e^-\rightarrow Fe

Thus iron gains electrons mean It is reduced

6 0
3 years ago
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