D. 18 as the elements in this group are the noble gases which exist as monoatomic elements with a full outer shell
What time tho?
you did not put when
Answer:
Acetone will evaporate faster than water
Explanation:
The rate of evaporation of a substance has a lot to do with the intermolecular forces present in the liquid.
Intermolecular forces in acetone are the weak dispersion forces in acetone while hydrogen bonds are the dominant forces in water. Hydrogen bonds lead to strong intermolecular association and prevent quick evaporation of the water. The weak dispersion forces in acetone leads to its easy evaporation.
Answer:
Mass, m = 19466.7 kg
Explanation:
Given that,
Portland cement concrete (PCC) has a density of 150 lb/ft³
We need to find how many kilograms of PCC are required to cast a cylindrical column 1.15 m in diameter and 7.8 m in height.
Since, 1 kg = 2.205 lb
1 lb/ft³ = 16.018 kg/m³
150 lb/ft³ = 2402.77 kg/m³
Density,
m is mass of PCC in kg and V is volume of cylinder
So, the mass of PCC required is 19466.7 kg.
The answer would be tracer