Answer:
Approximately 38%
What percentage of incoming students report not drinking at all in the past year? Approximately 38% of incoming college students reported not drinking at all in the past year.
Explanation:
Answer: The volume of platinum is 
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of platinum= 87.6 grams
Density of the object = 
Putting in the values we get:
Thus the volume of platinum is
The mass of the cube with length of 2cm is 
- We were given length of cube as
<em>To know the volume of cube we can use the expression</em>
<em />
Volume of cube = 
Where a= length of cube=
Then volume of the cube 
- Density was given as
But we know that density is the ratio of mass to the volume of a substance.
- Then
But we are looking for mass of the object, the we can make Mass as subject of the formula
Them substitute the values
<em>Therefore mass of the cube is</em>
Learn more at: brainly.com/question/18320053?referrer=searchResults
Explanation:
When an object undergoes a physical change (solid to liquid, decrease in temperature etc.), the mass of the object remains constant.
When water freezes, the water molecules vibrate closer to one another and there is less space between the molecules.
The same number of water molecules now occupy a smaller volume, therefore their density increases.
The correct answer is the 3rd option.
Answer:
V₂ = 12.43 L
Explanation:
Given data:
Initial pressure = 650 KPa
Initial volume = 2.2 L
Final pressure = 115 KPa
Final volume = ?
Solution:
The given problem will be solved through the Boyles law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
650 KPa ×2.2 L = 115 KPa × V₂
V₂ = 1430 KPa. L/ 115 KPa
V₂ = 12.43 L
