<span>0 °C. 8 °C. 29 °C. 15 °C.</span>
Answer:
41.63g
Explanation:
Given parameters:
Volume of CaCl₂ = 500mL = 0.5L
Concentration = 0.75mol/L
Unknown:
Mass of the solute needed = ?
Solution:
The mass of the solute can be derived using the expression below;
Mass = number of moles x molar mass
But,
Number of moles = Concentration x Volume
So;
Mass = Concentration x Volume x molar mas
Molar mass of CaCl₂ = 40 + 2(35.5) = 111g/mol
Mass = 0.75 x 0.5 x 111 = 41.63g
Osmosis is the movement of water and is always the movement in the membrane. Diffusion does not need a membrane to make molecules and Diffusion is the movement of molecules.
hoped this helped, good luck
Ethene belongs to class of
unsaturated hydrocarbons called as
Alkenes. Alkene contains a
double bond between two carbon atoms. And the general formula for alkene is,
CnH2nWhereas in Ethene, n = 2, so
C₂H₄
Therefore, in ethene there are two carbon atoms doubly bonded to each other via
one sigma and
one pi bond. Also each carbon atom is further covalently bonded to
two hydrogen atoms via sigma bond as shown below,