Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the sugars can’t be separated by <span>filtration. It should be categorized as a homogeneous mixture since the sugar is homogeneously </span>dispersed<span> or mixed in water. It is completely dissolved resulting to uniform properties of the mixture.</span>
The least reactive elements are the noble gases since they have a full valence shell and thus require a lot of energy in order to form bonds.
For metals, reactivity increases as you move down a group and as you move leftward within a period.
The trend within a period is due to the increase in ionization energy caused by the decrease in electrons needed to be lost in order for an element achieve a full valence electron shell. The trend within a group is due to the valence shell being further away from the nucleus, resulting in less attractive forces and thus less energy needed for reaction.
For nonmetals, the trends are reversed. Reactivity as you move up a group and as you move rightward within a period.
As you move up a group, the element increases in electromagnetism and thus increasing its reactivity. As you move across a period, there is less electrons needed to be received in order for the element to achieve a full valence shell
hope this helps hun
Cells, antibodies…
jk don’t actually try this, be more specific about the question?
Answer:
Here you can use the Clausis Clayperon equation: ln P1/P2=-Ea/R-(1/T1 - 1/T2)
where P1 is the pressure at standard condition: 760 mm Hg
P2 is the variable we need to solve
Ea is the activation energy, which in this case is delta H vaporisation: 56.9 kJ/mol
R is the gas constant 8.314 J/mol or 8.314 J/mol /1000 to convert to kJ
T1 is the normal boiling point 356.7 C, but converted to Kelvin: 629.85K
T2 is room temperature 25 C, but converted to Kelvin: 298.15 K
Once you plug everything in, you should get 4.29*10^-3 mmHg
Explanation:
The answer should be (D) Ca, because all others either occur as diatomic or are anions.
