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iVinArrow [24]
3 years ago
12

Give at least two ways to know if a reaction is endothermic or exothermic

Chemistry
1 answer:
mafiozo [28]3 years ago
5 0

Answer:

An exothermic reaction is a chemical reaction that releases energy by light or heat. Endothermic reaction is a chemical reaction that absorbs energy or heat from its surroundings

Explanation:

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(ii) Electrons are supplied to the external circuit. How and where is this done?<br> [2]
pentagon [3]

Answer:

The electrons are supplied by the species getting oxidized. They move from anode to the cathode in the external circuit. The external battery supplies the electrons. They enter through the cathode and come out through the anode

7 0
3 years ago
Is pcl3 covalent or ionic
WITCHER [35]
Covalent Bond.

To be specific, it is polar covalent bond. :)
5 0
3 years ago
Write five characteristics of good government?​
Oduvanchick [21]

Explanation:

giving equal opportunity,making good governance, maintaining peace and harmony among people, other try to write by your self

5 0
3 years ago
An atom with an atomic number of 10 and a mass number of 24 would have ________.
Anastaziya [24]

An atom with an atomic number of 10 and a mass number of 24 would have 14 neutrons.

<h3>What is atomic number and mass number?</h3>

The term atomic number, conventionally denoted by the symbol Z.

Atomic number indicates the number of protons present in the nucleus of an atom, which is also equal to the number of electrons in an uncharged atom.

The mass number of a given atom is defined by the number of protons and neutrons present in the nucleus. In simple,

Protons + Neutrons = Mass Number

To learn more about atoms, refer

https://brainly.in/question/5318

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6 0
1 year ago
What volume of 0.585 m ca(oh)2 would be needed to neutralize 15.8 l of 1.51 m hcl?
SpyIntel [72]
When the balanced reaction equation is:

2HCl(aq) + Ca(OH)2(aq) → CaCl2(aq) + 2H2O(l)

from the balanced equation, we can get the molar ratio between HCl & Ca(OH)2

2:1

∴ the volume of Ca(OH)2 = 15.8 L HCl * 1.51 m HCl * (1mol Ca(OH)2/ 2mol HCl) *                                           (1L ca(OH)2/0.585 mol Ca(OH)2 

                                          = 20.4 L
8 0
3 years ago
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