Question No. 147 How many moles of HCl are present in 35.5 mL of a 0.20 M solution? (A) 0.236 mol (B) 0.178 mol (C) 0.974 mol (D) 0.0071 mol
Answers
Answer:
0.0071 mole
Explanation:
These questions can easily be resolved using the relationship that concentration (or molarity) m = no. of moles / no. of litres.
In this case, simply rearrange for no. of moles.
No. of moles = molarity x no. of litres = 0.2 x (35.5/1000) = 0.0071 mol.
Answer:
0.0071 mole
Explanation:
These questions can easily be resolved using the relationship that concentration (or molarity) m = no. of moles / no. of litres.
In this case, simply rearrange for no. of moles.
No. of moles = molarity x no. of litres = 0.2 x (35.5/1000) = 0.0071 mol.
The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). [1][2] [3] How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. There are precisely 6.022140761023 elementary entities in a mole. An elementary entity can be an atom, a molecule, an ion, an ion pair, or a subatomic particle like an electron depending on what the substance is. For instance, although having differing volumes and weights, 10 moles of water (a chemical compound) and 10 moles of mercury (a chemical element) both contain the same quantity of substance and exactly one atom for each molecule of water.
The quantity of elementary entities in one mole is known as the Avogadro number, which is the approximate number of nucleons (protons or neutrons) in one gram of ordinary matter. The previous definition of a mole was the number of elementary entities equal to that of 12 grams of carbon-12, the most common isotope of carbon.
See more:
https://brainly.in/question/8494488
#SPJ3