Which source of energy causes most of the water evaporation on Earth’s surface?
1 answer:
You might be interested in
Taking into account the definition of density, the mass of a substance with a volume of 150 cm³ and a density of 1.5 is 225 grams.
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
<h3>Mass of the substance in this case</h3>In this case, you know that:
- Density= 1.5
- Volume= 150 cm³
Replacing in the definition of density:
Solving:
mass= 1.5 ×150 cm³
<u><em>mass= 225 g</em></u>
In summary, the mass of a substance with a volume of 150 cm³ and a density of 1.5 is 225 grams.
Learn more about density:
#SPJ1
<u>Answer:</u>
<u>For a:</u> The number of moles of air present in the RV is 0.047 moles
<u>For b:</u> The number of molecules of gas is
<u>Explanation:</u>
- <u>For a:</u>
To calculate the number of moles, we use the equation given by ideal gas follows:
where,
P = pressure of the air = 1.00 atm
V = Volume of the air = 1200 mL = 1.2 L (Conversion factor: 1 L = 1000 mL)
T = Temperature of the air =
R = Gas constant =
n = number of moles of air = ?
Putting values in above equation, we get:
Hence, the number of moles of air present in the RV is 0.047 moles
- <u>For b:</u>
According to mole concept:
1 mole of a compound contains number of molecules.
So, 0.047 moles of air will contain number of gas molecules.
Hence, the number of molecules of gas is