Answer:
A conical measure is a type of laboratory glassware which consists of a conical cup with a notch on the top to allow for the easy pouring of liquids, and graduated markings on the side to allow easy and accurate measurement of volumes of liquid
Answer:
number of moles of water (n) = 1.383 x10 ⁻⁵ mol
Explanation:
Data Given:
No. of molecules of water = 8.33×10¹⁸
No. of Mole of water = ?
Formula Used to calculate
no. of moles = numbers of particles (ions, molecules, atoms) /Avogadro's number
Avogadro's no. = 6.023 x10²³
So the formula could be written as
no. of moles (n) = no. of molecules of water /6.023 x10²³
Put the values in above formula
no. of moles (n) = 8.33×10¹⁸ /6.023 x10²³
no. of moles (n) = 8.33×10¹⁸ /6.023 x10²³
no. of moles (n) = 1.383 x10 ⁻⁵
so 1.383 x10 ⁻⁵ moles of water are represented by 8.33×10¹⁸ molecules of water.
Answer:
75.1
Explanation:
The isomers contains the similar and accurate chemical formulas but at the same time the structure of the molecular is different. This represents that the masses of the molecular would be similar
Therefore the molecular mass of methyl ethanoate, i.e. an isomer propanoic acid is 75.1 i.e. equivalent to the molecular mass of the propanoic acid
So, it should be 75.1
<span>Water molecules that move throughout the solute.
When you put a solvent in the water, the water molecule will start to surrounds every small particles of the solute to dissolve it. solute is not actually gone, it just mixes with the water molecules.</span>
Answer:
Number of mole = 0.0342 mole of Boron
Explanation:
One mole of a substance is equal to 6.022 * 10^23 units of that substance.
According to the definition in chemistry, mole is defined as the mass of substance containing the same number of fundamental units.
To calculate the number of mole, we will use the formula
n = m/Mm
n = number of mole
m = number of mass
Mm = number of molar mass
Molar mass of boron = 10.811g/mol
Mass of boron = 3.70 * 10^-1g
Using the formula
n = m/Mm
n = 3.70 * 10^-1 / 10.811g/mol
n = 0.0342 mole