These are isotopes of that element. The nucleus is different because the number of neutrons differ and aren't the same. The number of protons are the same though.<span />
the answer is i have a pig brain and bigger pp
The gases changes its volume because there are no force holding the gas molecules together. Hence the option C is correct.
Gases do not have a definite shape or volume because the molecules in the gases are very loosely packed, they have large intermolecular spaces , hence they move around. The force of attraction between the molecules is also very less, as a result gases acquire any shape or any volume. In comparison to liquids and solids, intermolecular interactions between gas particle are weaker. Because the atoms in gases are loosely connected to one another, they can move more quickly than those in liquids. Thus, gases lack both a defined shape and a defined volume. They merely assume a container-like shape.
So, gas molecules can break loose easily from any boundary and can fill any space. Hence, they do not contain any definite volume.
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The pOH of a solution at 25. 0 °C that contains 2. 95 × 10^-12 M hydronium ions is 0.5.
pH is the concentration of the hydrogen ion released or gained by the species in the solution that depicts the acidity and basicity of the solution.
pOH is the concentration of the hydroxide ion in the solution and is dependent on the pH as an increase in pH decreases the pOH and vice versa.
Total H+ ions = 2.95 x 10⁻¹² M
pH is calculated as:
pH = -log[H+]
Substituting values in the equation:
log( 2.95 x 10⁻¹² M)= 13.5 pH
pOH is calculated as:
14 - pH = pOH
Substituting values in the equation above:
14 - 13.5 = 0.5 pOH
Therefore, pH is 13.5 and pOH is 0.5.
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