Answer: 125 g
Explanation:
To calculate the moles :
The balanced reaction is:
According to stoichiometry :
1 mole of require = 3 moles of
Thus 1.30 moles of will require= of
Mass of
Thus 125 g of will be needed to burn 36.1 g of
Answer: The answer is D. Molecular solids are usually excellent conductors of electric current
Explanation: Molecular solids are solids that have separate individual molecules held together by intermolecular forces (Van der Waal's force) rather than bonds.
Van der Waal's forces are the weak forces that contribute to intermolecular bonding between molecules.
Examples of a molecular solid are water ice, solid carbon dioxide and white phosphorus.
Molecular solids cannot conduct electricity because they have localized electrons (election localized within the bonds in each molecule).
Answer:
Potassium
Explanation:
In group one of the periodic table both the melting and the boiling points usually decrease down the group.
Now, down the group, it's lithium that comes first, then sodium, then potassium.
Thus, among the 3, potassium is furthermost down the group by virtue of the factor it has the highest atomic number.
Therefore, we can say that potassium has the lowest boiling point among the 3.
They cancel each other out so they are neutral.