Answer:
Observations of the sky allowed explorers to mark the passage of time both in hours and through the months of the year. Early astronomers also realized that the night sky does not look the same from different places on the Earth.
Answer: The correct answer is : 44.1 g / mol
Explanation: d = PM / RT
M = dRT / P
d = 1.97 g / l
R = ideal gas (0.082 06 l - atm / mol - ° K)
P = 1 atm
T = 273 ° K
M = Molar mass
M = 1.97 g / l x 0.082 l - atm / mol - ° K x 273 ° K / 1 atm
M = 44.1 g / mol
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Answer:
D.Triple Bonds
Explanation:
A Triple bond is when three pairs of electrons are shared between two atoms in a molecule. It is the least stable out of the three general types of covalent bonds.
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1. ocean-> seashells -> limestone -> lithosphere
2. ocean -> marine plants -> sediments -> lithosphere