Answer:
A number of other chemists before Mendeleev were investigating patterns in the properties of the elements that were known at the time. The earliest attempt to classify the elements was in 1789, when Antoine Lavoisier grouped the elements based on their properties into gases, non-metals, metals and earths. Several other attempts were made to group elements together over the coming decades. In 1829, Johann Döbereiner recognised triads of elements with chemically similar properties, such as lithium, sodium and potassium, and showed that the properties of the middle element could be predicted from the properties of the other two.
It was not until a more accurate list of the atomic mass of the elements became available at a conference in Karlsruhe, Germany in 1860 that real progress was made towards the discovery of the modern periodic table. This area of the website celebrates the work of many famous scientists whose quest to learn more about the world we live in and the atoms that make up the things around us led to the periodic table as we know it today.
Explanation:
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Answer:
2.13 x 10³moles
Explanation:
Given parameters:
Number of molecules in AlF₃ = 1.28 x 10²⁷molecules
Unknown:
Number of moles = ?
Solution:
A mole is a quantitative unit in chemistry used of taking measurements.
A mole of a substance is the amount of that substance that contains the avogadro's number of particles.
The particles can be molecules, atoms, neutrons, protons, electrons or formula units.
Number of moles =
Number of moles = = 2.13 x 10³moles
Answer:
The hydrolysis of an amide produces a carboxylic acid and ammonia or an amine.
Explanation:
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Answer:
82.6 moles
Explanation:
chemical equation:
CO2+ 4H2 → CH4 + 2H2O
Given data:
moles of carbon dioxide = 82.6 mol
moles of methane = ?
through the balanced chemical equation we will compare the moles carbon dioxide with methane
CO2 : CH4
1 : 1
82.6 : 82.6
we are given hydrogen so 82.6 moles of carbon dioxide will produce 82.6 moles of methane.
Answer:
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