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Related Questions
In what way did alchemists contribute to the development of modern chemistry? (Points : 3)
explained changes to matter in mystical, philosophical, or religious terms
created models of the internal structure of atoms
used experiments to analyze the relationship between gas pressure and volume
developed practical equipment, new procedures, and methods of identifying unknown substances @Trexy
Answers
Final answer:
Alchemists contributed to the development of modern chemistry by explaining changes to matter, developing practical equipment, and analyzing the relationship between gas pressure and volume.
Explanation:
Alchemists contributed to the development of modern chemistry in several ways:
Explained changes to matter in mystical, philosophical, or religious terms, which laid the foundation for later scientific investigation.Developed practical equipment, new procedures, and methods of identifying unknown substances, which improved the accuracy and efficiency of chemical experiments.Used experiments to analyze the relationship between gas pressure and volume, which led to the formulation of gas laws and a better understanding of the behavior of gases.which part of modern atomic theory was first developed by John Dalton?
A) Electrons are found in a cloud around the nucleus
B) Atoms are rearranged during chemical reactions
C) Atoms cannot be divided
D) Electrons are spread through an atom
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Final answer:
Dalton's Atomic Theory initially proposed that atoms cannot be divided, but further advancements in modern atomic theory revealed the existence of subatomic particles. J. J. Thomson's discovery of electrons reshaped the understanding of atomic structure.
Explanation:
Dalton's Atomic Theory first stated the concept that atoms cannot be divided. However, we now know that atoms are composed of subatomic particles - protons, neutrons, and electrons - leading to the discovery that atoms are divisible.
Contrary to Dalton's belief, atoms are not indivisible as he proposed. Subsequent experiments led to the identification of these subatomic particles, marking a significant advancement in modern atomic theory.
J. J. Thomson discovered electrons through his research on cathode rays, contributing to the understanding that atoms are composed of smaller elements beyond what Dalton originally theorized.
How many electrons does ga lose to achive noble gas arrangement?
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₃₁Ga³⁺ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰.
Would precipitation occur when 500 mL of a 0.02M solution of \(AgNO_3\) is mixed with 500 mL of a 0.001M solution of NaCl? Show your work.,
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NaCl + AgNO3 --> AgCl + NaNO3
To find out if precipitation will occur, we need to calculate the number of
moles acting in the chemical reaction
But Molarity, M=nV, where n is the number of moles and V is the volume in
litres. So n = M/V
number of moles of AgNo3 = 0.02/500 * 10^(-3)
n= 0.04
While n of Sodium chloride = 0.01/0.5 = 0.2. Since there is excess sodium chloride ( twice as much) precipitation will not occur. 2NaCl + 2AgNO3 -->
2AgCl + 2NaNO3. The reaction requires one and not two moles of AgNo3 as evident from the number of moles which is 0.04
The equation h3 po4 + 3koh → k3 po3 + 3h2 o is an example of which type of reaction?
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Answer:
snythis
Explanation:
Predict which change would cause the heat of vaporization (segment 4) segment to be longer.
a.add heat at a faster rate.
b.the amount of the substance decreases.
c.the boiling point temperature increases.
d.the intermolecular forces of the substance get stronger.
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Answer: option d. the intermolecular forces of the substance get stronger.
Justification:
1) The heat of vaporization is the heat required by a substance to overcome the intermolecular forces in the liquid state and pass to gas state.
2) From that, you can directly predict that the stronger the intermolecular forces the higher the heat of vaporization.
3) Graphycally that will be translated in a longer segment: the horizontal axis is time and the greater the heat of vaporization the longer the time needed.
6.02 x 1022 molecules of HCl (molecular weight = 36.5 g/mole) in 2.0 liters of water
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M = 0.100 / 2.00 L=0.0500
6.02 x 1022 molecules of HCl (molecular weight = 36.5 g/mole) in 2.0 liters of water. Therefore, M = 0.05
What is mole?The SI unit for measuring the quantity of any substance would be the mole, abbreviated as mol.
Given data:
Number of molecule = 6.02 x [tex]10^{22}[/tex] molecules
Molecular weight = 36.5 g/mole
Moles = 6.02 x [tex]10^{22}[/tex] / 6.02 x [tex]10^{23}[/tex] = 0.1mol
Hence, M = 0.1 /2 = 0.05
Therefore, M = 0.05
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The term element refers to atoms that have the same number of _______.
A.
protons
B.
ions
C.
neutrons
D.
electrons
Answers
A. Protons
Carbon contains all atoms that have 6 protons and 6 electrons.
The term element refers to atoms that have the same number of protons. Thus, the correct option for this question is A.
What are protons?Protons may be defined as the type of subatomic particles which are significantly present within the nucleus of a chemical element along with neutrons. These subatomic particles are positively charged in nature. Ernest Rutherford was thought to be the discoverer of these particles.
According to the modern periodic table, chemical elements are arranged in their increasing order of atomic number where an atomic number is demonstrated by the number of protons which are unique for each element. These elements have atoms that possess an identical number of protons.
Therefore, the term element refers to atoms that have the same number of protons. Thus, the correct option for this question is A.
To learn more about Protons, refer to the link:
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