<span>They can be separated by physical processes.
This problem requires you to simply memorize the definition of a mixture. So let's take a look at the choices and see why one is correct while the other three are wrong.
1. They are chemically bonded together - The definition of a mixture is where "two or more pure substances are combined where each substance retains its individual chemical property." This option isn't correct.
2. They can be classified as pure substances - This option doesn't work either since a mixture has two or more pure substances.
3. They have fixed ratios between their components - Imagine a mixture of salt and flour. You can have a little salt in the mixture or a lot of salt in the mixture. There isn't a fixed ratio, so this is also a bad choice.
4. They can be separated by physical processes - Since the other three options are all obviously false, this is the only possible option. Mind, the separation may not be easy (take a look at the salt and flour mixture used as a demonstration above), but it should be possible.</span>
Molarity is the number
of moles of solute in one liter of the solution. Mathematically, M = n/V. Where
Molarity of the solution is M, Number of moles of solute is n, and volume of the
solution is V.
Calculate the mass in
1000 mL of the solution. Density of acetic acid is 1.00 g/mL.
Density = 1.00 g/mL. 1.0
mL has mass 1.00 g. 1000.0 mL has mass = (1000.0 mL/ 1.0 mL) * 1.00 g = 1000.0
g. hence, the mass in 1000.0 mL of the solution if 1000.0 g.
Calculate the mass
contained of 5.00 % acetic acid as follows: 5.00 % of 1040 g = (5.00 / 100) *
1000.0 g = 50.0 g. Hence, the mass contained of 5.00 % acetic acid is
50.0 g.
Calculate the number of moles of acetic acid. Number of
moles = Mass / Molar mass = 50.0 g / 60.0 g/mol = 0.8333 mol. Hence, the number
of moles of acetic acid is 0.8333 mol.
Calculate the molarity of the solution, M = n / V = 0.8333
mol / 1.0 L = 0.8333 M
Therefore, the molarity of the solution if 0.8333 M
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Answer:
Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons. Radioisotopes are radioactive isotopes of an element. They can also be defined as atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus.