What is the best description of the Bohr model of the atom?A.)The atom consists of a positively charged material with negatively charged electrons embedded within it.
B.)The atom consists of a nucleus with electrons orbiting randomly around it.
C.)The atom consists of a nucleus with electrons orbiting at specific energy levels. Absorbed photons cause electrons to jump between energy levels.
D.)The atom consists of a nucleus surrounded by a region containing electrons. Electrons cannot be located exactly within this region, but the probability that they will be found in an area can be stated.
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Considering the definition of molar mass and molarity, the volume of each compound is:
- NaCl= 0.1355 L
- C₂H₆O = 0.0622 L
- CH₃COOH = 0.047 L
Definition of molar mass
The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Definition of molarity
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
Molarity is expressed in units.
Volume required
You know that the molar mass of each compound is:
- NaCl = 58.44 g/mol
- C₂H₆O = 46.06 g/mol
- CH₃COOH = 60.0 g/mol
On the other side, you know that the mass of each compound is:
- NaCl = 2.14 g
- C₂H₆O = 4.30 g
- CH₃COOH = 0.85 g
Then, considering the definition of molar mass, the amount of moles of each compound is:
- NaCl =
= 0.0366 moles
- C₂H₆O =
= 0.0933 moles
- CH₃COOH =
= 0.0141 moles
The molarity of each compound is:
- NaCl = 0.27 M
- C₂H₆O = 1.50 M
- CH₃COOH = 0.30 M
Considering the molarity, the volume of each compound is calculated as:
- NaCl =
= 0.1355 L
- C₂H₆O =
= 0.0622 L
- CH₃COOH =
= 0.047 L
Learn more about
molar mass:
molarity:
number of moles : 2.14 / 58.44 = 0.0366 moles
V = n / M => 0.0366 / 0.270 = 0.1355 L
__________________________________________
b) C2H6O = 46.06 g/mol
number of moles : 4.30 / 46.06 = 0.0933 moles
V = n / M => 0.0933 / 1.50 = 0.0622 L
___________________________________________
c) CH3COOH = 60.0 g/mol
number of moles : 0.85 / 60.0= 0.0141 moles
V = n / M => 0.0141 / 0.30 = 0.047 L
___________________________________________
hope this helps!
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The protons are located inside the nucleus and have a positive charge.
The electrons are located outside the nucleus and have a negative charge.
The neutrons are located inside the nucleus and have no charge.
Explanation:
- Atom is defined as the smallest unit of a matter.
- Atom is made up of three subatomic particles: protons, electrons, and neutrons.
- Protons and neutrons are collectively known as nucleons.
- Protons are located inside the nucleus of an atom and are positively charged.
- Electrons are located outside the nucleus of an atom and are negatively charged.
- Neutrons are located inside the nucleus of an atom and have no charge.
- It is electrically neutral because they have the same number of protons and electrons.
Learn more about subatomic particles here:
B. new crusts move at midocean ridges
C. tectonic movements cause hotspot volcanism
D. mountains are created along cracks in Earth plates
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Answer:d
Explanation:test
True
False
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Just in case you do get it, a ligament will attach a bone to a bone, just as a fun fact
Answer:
This is true.
Explanation: