Answer:
iodine
Explanation:
<em>The substance that can break easily from the list of substances is the </em><em>iodine</em><em>.</em>
<u>Iodine exists as a molecular solid and hence, the molecules are held together by weak Van Der Waal's forces. Iodine thus has characteristic properties of typical molecular solids which include being able to be broken into pieces easily (brittle), low melting and boiling points, insolubility in water, among other properties.</u>
The characteristics of iodine are unlike sodium, calcium, and copper that exist as metal which is hard, tough with high tensile strengths.
Answer : The heat energy needed would be, 6486.5125 J
Explanation :
To calculate the change in temperature, we use the equation:
where,
q = heat needed = ?
m = mass of aluminum = 223 g
c = specific heat capacity of aluminum = 
= change in temperature
= initial temperature = 
= final temperature = 
Putting values in above equation, we get:
Therefore, the heat energy needed would be, 6486.5125 J
Answer:
The dense vapours of carbon tetrachloride forms a protective layer on the burning objects and avoids the oxygen or air to come in contact with the fire from the burning objects and provides incombustible vapours.
Explanation:
Hope This Helps
Happy Hoildays
~Zero~
The valence-shell electron-pair repulsion (VSEPR) theory states that electron pairs repel each other whether or not they are in bond pairs or in lone pairs. ... The shape of a molecule is determined by the location of the nuclei and its electrons
Answer:
Option A. This step is to remove water from the ether layer.
Explanation:
When the goal of an experiment is to conduct a reaction and isolate the product, it is referred to as work-up. The work-up refers to method aimed at purifying the material and most commonly occur in a separatory funnel. Solutions are added to the funnel to either extract or wash the mixture with the goal of isolating the product from excess reagents, catalysts, solvent, side product that may arise from side reactions.
Common washes include: Water, Sodium Bicarbonate, Sodium Carbonate, saturated sodium chloride (brine).
When an organic layer ( e.g. diethyl ether, ethyl acetate) is washed with brine, the purpose of the wash is to REMOVE LARGE AMOUNT OF WATER that may be dissolved in the organic layer.
Brine works to remove water from an organic layer because it is highly concentrated (since Sodium Chloride is highly water soluble. Therefore, the most likely reason for washing a reaction product mixture containing hydrocarbons in diethyl ether with with brine solution in a separatory funnel is to remove the water from the ether layer.
