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liberstina [14]
3 years ago
10

What is a chemical change?

Chemistry
1 answer:
ipn [44]3 years ago
5 0

A chemical change, also known as a chemical reaction, is a process in which one or more substances are altered into one or more new and different substances. In other words, a chemical change is a chemical reaction involving the rearrangement of atoms.

Hope this helps! ;)

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Which of the characteristics below best describes organic compounds
aleksandr82 [10.1K]

what are the options

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Is matter continuous and therefore has no finer structure or is it discontinuous and thus made or tiny particles
Marta_Voda [28]

Matter is discontinuous, and it is made of tiny particles called atoms

Explanation:

Matter is not a continuous structure, but it consists of tiny particles called atoms.

An atom consists of three types of particles:

  • Proton: the proton is in the nucleus of the atom. it has a positive electric charge of +1.6\cdot 10^{-19}C (also called fundamental charge). Its mass is 1.67\cdot 10^{-27}kg.
  • Neutron: the neutron is also in the nucleus of the atom, but it has no electric charge. Its mass is similar to the mass of the proton (slightly heavier). Neutrons and protons are held together in the nucleus through the strong nuclear force.
  • Electron: electrons are found in a "cloud" outside the nucleus. Electron has negative electric charge equal to -1.6\cdot 10^{-19}C. Its mass is much approximately 1800 times smaller than that of the proton, so it is considered as negligible.

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brainly.com/question/2757829

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7 0
2 years ago
When a substance melts it is said to go through all of the following except:
Alex Ar [27]
C. Chemical change because it doesn’t change it chemical makeup but it will change temps it’s physical appearance and phase change or change of state
4 0
3 years ago
Read 2 more answers
Predict the products of this renction. You do not have to balance the equation
Daniel [21]

Answer:

NaCl+I2

Explanation:

7 0
2 years ago
An Aqueous solution is 0.500% by mass ammonia,NH3, and has a density of 0.996g/mL. The molarity of ammonia in the solution is __
SCORPION-xisa [38]

Step 1

Molarity is defined as Moles of solute (NH3) divided by the volume of the solution in L

Molarity (mol/L or M) = moles of NH3/volume of the solution (L) (1)

---------

Step 2

The moles of solute (NH3):

0.500 % by mass means:

0.500 g/100 g solution

Moles of NH3 are calculated as:

Mass of NH3/molar mass NH3 = 0.500 g/17.0 g/mol = 0.029 moles NH3

(molar mass NH3 = 17.0 g/mol)

----------

Step 2

The volume of solution:

Volume is calculated from density

Density = mass solution/volume of solution

Volume = mass of solution/density = 100 g solution/0.996 g/mL => Volume = 100.4 mL

1L = 1000 mL => V = 100.4 mL = 0.1004 L

-----------

Step 4

From (1)

Molarity = moles of NH3/volume of the solution (L) = 0.029 moles NH3/0.1004 L = 0.289 mol/L

Answer: M = 0.289 M or mol/L

6 0
1 year ago
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