Answer:
Common combustion reactions break the bonds of hydrocarbon molecules,
Explanation:
the resulting water and carbon dioxide bonds always release more energy than was used to break the original hydrocarbon bonds. That's why burning materials mainly made up of hydrocarbons produces energy and is exothermic.
Ionic, think about the way metals share electrons with other metals, resulting in malleability.
When a liquid is frozen, the atoms in the liquid slow their movement due to lack of energy so the substance becomes hard.
As against non-metals are the elements which are usually soft. ... Generally, the elements containing 1,2 or 3 electrons in the valence shell of their structure are known as metals. While the elements with 4, 5, 6 or 7 electrons in their outermost shell are known as non-metals.
Answer:
THE MOLARITY OF THE SOLUTION IS 0.1368 mol/dm3
Explanation:
Molarity is the number of moles of the solute per litre of the solution.
It is expressed as;
Molarity in mol/dm3 = Molarity in g/dm3 / Relative molecular mass
Step 1: obtain the molarity in g/dm3
4.6 g of CuCl2 in 250 mL solution
4.6 / 250 * 10^-3
= 4.6 / 0.25
= 18.4 g/dm3 of CuCl2
Step 2: calculate the relative molecular mass of CuCl2
( Cu = 63.5 , Cl = 35.5)
RMM = 63.5 + 35.5 *2
= 63.5 + 71
= 134.5 g /mol
Step 3: Calcullate molarity in mol/dm3
Molarity in mol/dm3 = molarity in g/dm3 / RMM
= 18.4 g/dm3 / 134.5 g/mol
= 0.1368 mol/dm3
So therefore, the molarity of CuCl2 is 0.1368 mol/dm3
