this is a dilution question where a certain volume is taken from a more concentrated solution and diluted to make a solution with a lower concentration.
the dilution forumla is as follows
c1v1 = c2v2
where c1 is concentration and v1 is volume of the more concetrated solution
c2 is concentration and v2 is volume of the diluted solution
substituting the values in the equation
18.0 M x V = 0.126 M x 16.5 L
V = 0.1155 L
volume of 115.5 mL is taken from the 18.0 M solution and diluted upto 16.5 L solution.
Answer:
- Option C) the chance of water-borne diseases.
Explanation:
When a <em>flood </em>happens, water will lpotentially get contaminated by several causes which include the overflow of untreated wastewater, the decomposition of the carcasses of animals and people, and the chemical contamination from industries.
In general, biochemical and chemical hazards are present in the water, after a flood, which means that the authorities and population should take extreme care for the use and intake of water: chemical treatment (use of chlorine), boil water. As usual, children and the elderly are the most at risk in those conditions.
Answer:
The answer is D.
Explanation:
Silver consists of 92.5% silver, and the remaining part is copper. ... Pure silver is not susceptible to tarnish in a pure oxygen environment. However, the copper that is contained in 925 sterling silver may react to the ozone and hydrogen sulfide in the air and cause sterling silver to tarnish.
Answer:
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Answer:
B) The shape of the molecule is determined by the valence electrons of the different atoms within a molecule repelling each other, so the atoms are as far apart as possible from any other valence shell.
Explanation:
VSEPR denotes Valence Electron Pair Repulsion.
It is one of the theories used to predict the model of a compound or molecule.
- An atom bonded by two or more other kinds of atoms as in many covalent molecules and ions have their geometry determined by the bonds around the central atom.
- The VESPR theory determines the total number of electron pairs surrounding the central atom of a specie.
- The electron pairs orients in such a way as to minimize the electrostatic repulsion between them.
