GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To measure the amount of grams in a substance
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To measure the amount of atoms or molecules in a substance
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To measure the amount of energy in a substance
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To measure the amount of bonding in a substance
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Detailed explanation-1: -The mole is an SI unit that links the microscopic and macroscopic world. It allows scientists to measure large quantities of very small entities, such as atoms or molecules. Initially, units called ‘gram-atom’ and ‘gram-molecule’ were used to specify amounts of chemical elements or compounds.
Detailed explanation-2: -Because atoms, molecules, and other particles are all extremely small, you need a lot to even weigh them, so that’s why chemists use the word “mole.” Keep in mind that not everything weighs the same if you have a mole of it. A mole refers to the number of particles you have, not the mass.
Detailed explanation-3: -Chemists use moles when calculating reagents for a chemical reaction or determining concentration of a solution. Similar to how a recipe requires specific amounts of each ingredient, reaction protocols call for specific ratios of each reagent, and using moles allows chemists to directly determine that ratio.
Detailed explanation-4: -To go from moles to molecules, multiply the number of moles by 6.02 x 1023. To go from molecules to moles, divide the numbers of molecules by 6.02 x 1023.