What is the sum of 0.04321 g + 5.263 g + 2.13 g to the correct number of significant digits
Answers
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The answer for the following problems is mentioned below.
- Therefore the number of moles present in Argon is 0.20 moles.
Explanation:
Mole:
The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of .
Given:
volume (v) = 4.7 litres
Volume of argon at STP conditions = 22.4 litres
To find:
volume of argon at STP conditions
We know;
n =
where;
n represents the no of moles
v represents the volume of the argon
V represents the volume of argon at STP
volume of the argon at STP conditions is 22.4 litres
So;
n =
n = 0.20 moles
Therefore the number of moles present in Argon is 0.20 moles.
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Democritus, an ancient Greek philosopher who lived around 460-370 BCE, made significant contributions to the early development of the atomic theory.
His ideas laid the foundation for the later development of modern atomic theory. Here's how Democritus contributed to the atomic theory and the structure of the atom:
Concept of Indivisible Atoms: Democritus proposed that everything in the physical world was made up of tiny, indivisible particles called "atoms." The word "atom" itself is derived from the Greek word "atomos," which means "indivisible" or "uncuttable." Democritus believed that atoms were the fundamental building blocks of matter and that they could not be divided into smaller parts.
Various Shapes and Sizes: Democritus suggested that atoms could vary in shape and size. He proposed that different substances were composed of atoms with different shapes, which explained the diversity of matter in the universe.
Empty Space: Democritus also introduced the idea of "void" or empty space between atoms. He believed that atoms were in constant motion and that the void allowed for this motion.
Lack of Experimental Evidence: It's important to note that while Democritus made these philosophical speculations about atoms, he did not provide any experimental evidence to support his ideas. His atomic theory was largely based on reasoning and thought experiments rather than empirical data.
Democritus' atomic ideas were influential, but they were largely overshadowed by the more prominent theories of his contemporary, Aristotle, which emphasized the existence of four fundamental elements (earth, water, air, and fire). It wasn't until much later, in the 19th century, that John Dalton and others developed the modern atomic theory, which incorporated experimental evidence and refined our understanding of atoms as the smallest units of matter that retain the properties of chemical elements.
Democritus contributed to the atomic theory by proposing the concept of indivisible atoms as the fundamental building blocks of matter, but his ideas lacked experimental support and were not widely accepted in his time.
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Also their names are different.
CO4 - Carbon tetroxide
CO2 - Carbon dioxide
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Η Ο Η
TIL 1
H-C-C-C-H
1-CI
lodine monochloride, ICI
H
H
Acetone, C3H60
H-F
A mixture of water (H2O) and hydrogen fluoride
(HF)
Answers
Answer:
London dispersion, dipole-dipole interactions, hydrogen bonding
Explanation:
Please mark brainliest
Answer:
lodine monochloride- dipole-dipole interactions
Acetone-London dispersion
A mixture of water (H2O) and hydrogen fluoride-hydrogen bonding
Explanation:
Edg 2020 (Brainliest Lol)
(2) 119 atomic mass units
(3) 198 atomic mass units
(4) 277 atomic mass units
Answers
Protons have a relative mass of 1
Gold-198 is a radioactive isotope of gold, which means it has a different number of neutrons, but the same number of protons and electrons
So the answer is (1) 79 atomic mass units
The total mass of protons in a gold-198 atom is about 79 atomic mass units. This calculation considers the 79 protons, each with a mass of approximately 1 amu.
The correct answer is option 1.
The total mass of protons in an atom of gold-198 is approximately 79 atomic mass units. This is determined by considering the number of protons in the nucleus, which is 79 for gold-198. Each proton has a mass of approximately 1 atomic mass unit (amu). Therefore, multiplying the number of protons by the mass of one proton yields the total mass of the protons.
In the case of gold-198:
Total mass of protons = Number of protons × Mass of one proton
Total mass of protons = 79 protons × 1 amu/proton
Hence, the total mass of protons in an atom of gold-198 is approximately 79 atomic mass units.
In summary, the calculation involves recognizing that the mass number of an isotope is the sum of protons and neutrons. In this specific case, gold-198 has 79 protons, and the total mass of its protons is around 79 atomic mass units.
Therefore, from the given options the correct one is 1.
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