The molecules in warm air are more expanded, move more rapidly and take up more room than in cold air. The expansion and movement of molecules makes it less dense, thus it rises above the cold air. Cold air molecules are more compressed, making them more still and packed together, thus making it more dense than warm air.
Answer:
0.88mol
Explanation:
The number of moles, n, contained in a substance can be calculated using the formula;
Moles (n) = mass (m) ÷ molar mass (MM)
Molar mass of Magnesium oxide (MgO) = 24 + 16
= 40g/mol
According to the question, Mass of MgO = 35grams
Mole = 35/40
Mole = 0.875
Mole = 0.88mol
Answer:
4.07 × 10⁹ mL
Explanation:
Step 1: Given data
Length of the pool (L): 60.0 m
Width of the pool (W): 35.0 m
Depth of water in the pool (D): 6.35 ft
Step 2: Convert "D" to m
We will use the relationship 1 m = 3.28 ft
Step 3: Calculate the volume of water (V)
We will use the following expression.
Step 4: Convert "V" to mL
We will use the relationship 1 m³ = 10⁶ mL.
