Answer:
The number of moles of solute present in 4.00 L of an 8.30 M solution is 33.2
Explanation:
The Molarity (M) or Molar Concentration is the number of moles of solute per liter of solution; in other words it is the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
Molarity is expressed in units (
) or M.
In this case:
- molarity= 8.30 M
- number of moles of solute= ?
- volume= 4.00 L
Replacing:
Solving:
number of moles of solute= 8.30 M* 4 L= 8.30 * 4 L
number of moles of solute =33.2
<u><em>The number of moles of solute present in 4.00 L of an 8.30 M solution is 33.2</em></u>
I believe your answer would be NaOH.
Hope this helps.
Iodine is one of seven elements that usually form as diatomic molecules. These other "diatomics" are
and
. They typically bond to themselves.
Iodine has seven valence electrons. Using valence shell electron pair repulsion (VSEPR) theory, we can predict the Lewis dot structure for
. We see there are fourteen electrons, and we can make a covalent bond, leaving three lone pairs on each atom. The bond replaces two electrons, so the number of electrons shared is two.
I think the mass the mass was less than the original because a gas was released into the atmosphere. The mass in a chemical reaction is constant in a closed system according to conservation of mass law. However, if a chemical reaction is completed in an open system, mas changes may occur. In our case i think the change in mass was due to the release of hydrogen gas from the reaction to the atmosphere.
The white dwarf has the lowest density of the stars listed. Hope this helps and have a nice day!
