In a molecule, two or more atoms stay together because of the mutual attraction between the positively charged protons from one atom and the negatively charged electrons from the other atom. This causes the covalent or ionic bonding that holdsatoms or ions together.
<span>The organizational characteristics of the periodic table of the elements are within a system where all known elements are classified. They are placed from left to right and top to bottom in increasing order of their atomic numbers. The elements are arranged in seven horizontal rows called periods, and in 18 vertical columns called groups or families. Down and to the left increases the atomic radius and the ionic radius. Upwards and to the right increases ionization energy, electron affinity and electronegativity.</span>
Answer:
By taking 18.8 mL of the stock solution and adding about 781.2 mL of water to obtain the desired dilution
Explanation:
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In this case, for this dilution problem, it will be possible for us to calculate required volume of the stock NaOH solution by considering that the moles of this solute remain unchanged so we can use the following equation:
Whereas the subscript 1 stands for the stock solution and 2 for the dilution. In such a way, we solve for the volume of the former, V1, as shown below:
It means we take 18.8 mL of the stock solution and add about 781.2 mL of water to obtain the desired dilution.
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There are three ways of abrasion occurs in nature; the wind, waves, and gravity. Abrasion is the mechanical process of wearing away of a rock surface and the movement of the particles while transporting through the wind, waves, and gravity.
Answer:
D is correct
Explanation:
because
we know that
density of lead is 11.36 g/cm3
and
density of tin is 7.31 g/cm3
so..
density of alloy by mixing 50/50
=(11.36+7.31)/2 g/cm3
=18.67/2 g/cm3
=9.33 g/cm3