Kepler’s third law exhibits the relationships between the distance of a planet from the sun and the period of its revolution. Kepler’s third law is also sometimes referred to as the law of harmonies.
Kepler’s third law compares the orbital period and the radius of an orbit of a planet to the distance of the planet to the sun. It states mathematically that the more distant a planet is from the sun the greater its orbital period will be. The period of revolution of a planet is measured in days, weeks, months or years. For example, Earth’s period of revolution is 365 days.
True
sound travels as energy, unlike light.. the waves transmit energy by changing the motion of particles. The particles are moving in the same direction as the wave.
Answer: The volume of boron trifluoride gas that is collected is 18.6 L
Explanation:
According to the ideal gas equation:
PV=nRT
P = Pressure of the gas = 1 atm
V= Volume of the gas= ?
T= Temperature of the gas in kelvin =
R= Gas constant = 
n= moles of gas= 854 mmol = 0.854 mol (1mmol=0.001mol)
Thus volume of boron trifluoride gas that is collected is 18.6 L
A real gas behaves closely to ideal behavior at low pressures and high temperatures.<span>As the temperature is increased, the behavior of the gas appears to become more ideal. </span><span>From the above figures, it can be deduced that a real gas behaves closely to ideal behavior at low pressures and high temperatures.</span>
Al
Na
S
O
Br
Ca
Explanation:
The atomic radius is taken as the half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements. It is also the half - distance between two nuclei in the solid state of metals.
Across a period on the periodic table, atomic radii decreases due to increase in the nuclear charge without an attendant increase in the number of electronic shells.
Down a group atomic radii increases due to successive shells of electrons being added.
a. Al or B : down a group III, so aluminium is larger
b. Na or AI
: across a period so Na is larger
c. S or o
: down group VI so sulfur is larger
d. O or F
: across a period so oxygen is larger
e. Br or CI
: down a group VII so Br is larger
f. Mg or Ca: down a group II so Ca is larger
Learn more:
Atomic radius brainly.com/question/5048216
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