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The mole is the unit for the amount of substance. The number of particles in a substance can be found using the Avogadro constant. The mass of product depends upon the mass of limiting...
- Metals and Non-Metals
Metals close metal Shiny element that is a good conductor of...
- Hazards and Risks
GCSE; Edexcel; Hazards and risks - Edexcel Hazard symbols....
- The Periodic Table
Listen to the full series on BBC Sounds. Iodine has a lower...
- Metals and Non-Metals
The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance's molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance. Created by Sal Khan.
- 6 min
- Sal Khan
- They are not the same thing but many people use the terms incorrectly Atomic mass and molecular mass should be in units of u (unified atomic mass u...
- The molar mass of any element is on the periodic table. For a molecule or compound, simply add up all the molar masses of the elements, taking subs...
- The basic idea is that your answer to a calculation shouldn’t have more significant figures than the initial quantity given has. The initial quanti...
- Traditionally, the most electronegative element is written last. However, there is no harm in writing ClNa, just as long as you know that chlorine...
- First, you can calculate the molar mass of FeCl2 by adding the molar masses of Fe (55.845 g/mol) and 2 atoms of Cl (2 times (35.446 g/mol). This gi...
- It's important to keep in mind significant figures are important for doing calculations in a science like chemistry. After a calculation would be a...
- This is true! This is the case because 1 mole of a molecule is equal to 6.02214076×10^23 (avogadros constant) individual molecules. Avogadros const...
- It is probably because the atomic mass of hydrogen is so small that the extra precision makes a more significant difference when doing calculations...
- The question says it’s a 1.52 kg sample of glucose. In order to use the molar mass of glucose (~180 g/mol), the 1.52 kg needs to be converted into...
- If you follow the maths of the units, it doesn’t yield mols as the answer. 1.52 kg is the total mass of the sample. And since glucose is a molecule...
Mole calculations. The gram formula mass of a substance is known as the mass of one mole. The mass, number of moles, concentration or volume of a substance can be calculated easily if you learn...
The mole is the unit for amount of substance. The number of particles in a substance can be found using the Avogadro constant. The mass of product depends upon the mass of limiting reactant.
Jul 29, 2021 · The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.
- 9 min
The mole and Avogadro's number. One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions). The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant. The concept of the mole can be used to convert between mass and number of particles..
- 9 min
- Sal Khan
Molarity or molar concentration is the number of moles of solute per liter of solution, which can be calculated using the following equation: Molarity = mol solute L of solution. Molar concentration can be used to convert between the mass or moles of solute and the volume of the solution. Introduction: Mixtures and solutions.
