D. Wind will always move from areas of high pressure to low pressure. It's the reason we have weather, or one of them. Temperature is another factor.
B. That is the definition of the greenhouse effect.
When changing states, only the intermolecular forces are considered, which, in water's case are hydrogen bonds. In order to go from solid to liquid to gas, the hydrogen bonds between the water molecules must be weakened to a certain degree that allows the molecules to spread further apart in liquids, and must be broken altogether to separate the molecules in order to turn it into gas.
Therefore, the answer is d.
The reason it is not the covalent bonds within molecules (despite the fact that it will turn water into a gas, it’s not water vapour, but hydrogen and oxygen gas) is that when bonds within a molecule are broken, this is called decomposition and it is a CHEMICAL change. Changing states is only a PHYSICAL change.
It is not ionic because water has covalent bonds.
Hydrogen bonds can only occur BETWEEN molecules (intermolecular forces).
Covalent bonds can only occur WITHIN molecules (intramolecular).
The reaction between Hydrogen and Oxygen under normal conditions is characterized by the following balanced equation:
2 H₂ + O₂ → 2 H₂O
The mole ratio (based on the coefficient used to balance the chemical equation) of H₂ : O₂ is 2 : 1.
Thus there are two times as many moles of H₂ in the reaction as there are moles of O₂.
∴ if the moles of H₂ = 1.75 mol
then the moles of O₂ = 1.75 mol ÷ 2
= 0.875 mol
Now, Mass = Moles × Molar Mass
Thus the mass of oxygen gas = 0.875 mol × 32 g/mol = 28 g
Thus the answer is 28 grams.
Answer:
B because you will feel the moons gravitational force and not earths
Hope it helps
Explanation:
