Answer:
At high altitude, it takes longer to cook spaghetti. (Ans 2).
Explanation:
A colligative property of a solution depends on the number of ions or solute particles present in the solution, not the type of the solute. Due to pressure change boiling points have nothing to do with colligative property and solutions.
Colligative properties include:
1) Freezing point depression.
2) Vapor pressure lowering.
3) Boiling point elevation.
4) Osmotic pressure.
At high altitude, the air is under less atmospheric pressure than it is at sea level. So at high altitude, it takes longer to cook spaghetti, because of the water it boils in is not as hot as is it at sea level.
Answer:
iron oxidizes
Explanation:
Being a solid, melting, and attraction are all physical properties.
I believe the answer would be a Covalent Bond
I don't understand . Sorry :(
Answer:
495 pm (see the relationship between the edge length (a) and radius (r) of atoms in attachment).
Explanation:
A <em>crystalline solid</em><em> possess rigid and long-range order; its atoms, molecules, or ions occupy specific positions</em>. A <em>unit cell</em><em> is the basic repeating structural unit of a crystalline solid</em>. Each sphere in the unit cell represents an atom, ion, or molecule and is called a <em>lattice point</em>. <u>The way the spheres are arranged in layers determines what type of unit cell we have.</u>
In the face-centered cubic cell, there are <u>spheres at the center of each of the six faces of the cube</u>, in addition to the eight corner spheres (see the second picture in the attachment). Each sphere in this arrangement is said to have a coordination number of 12 since each sphere is in contact with six spheres in its own layer, three spheres in the layer above, and three spheres in the layer below. The <em>coordination number</em><em> is defined as the number of atoms (or ions) surrounding an atom (or ion) in a crystal lattice</em>.
In the first picture in the attachment we can see that the relationship between the atomic radius <em>r</em> and the edge length <em>a</em> face-centered cubic cell is:
a=√8*r
Therefore, the edge length will be √8*175 pm = 495 pm