i need help ls i thank its book 500 grams
Answer: D) 1.00 g
Explanation:
According to the Avogadro's law, the volume of gas is directly proportional to the number of moles of gas at same pressure and temperature. That means,

or,

where,
= initial volume of gas = 2.00 L
= final volume of gas = 3.00 L
= initial moles of gas =
= final moles of gas = ?
Now we put all the given values in this formula, we get


Mass of helium =
Thus mass of helium added = (3.00-2.00) g = 1.00 g
<h2>
Hello!</h2>
The answer is:
The new pressure will be equal to 6 atm.

<h2>
Why?</h2>
Since we know that the temperature is constant, we can use the Boyle's Law to solve the problem.
The Boyle's Law establishes that when the temperature is kept constant, the pressure and the volume will be proportional.
So, we have the equation:

We are given,

Substituting and isolating
from the Boyle's Law, we have:

Hence, the new pressure will be equal to 6 atm.

Have a nice day!
The answer is 40.0 atomic number .
Answer:
Explanation:
Mass is how much an object weighs . Volume is the amount of space the object takes up