Answer:
C
Explanation:
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air.
Answer:
The way you can know which compound in a solution is a solvent is by usually just determining which substance is a solute and which is a solvent. The solute is when it is dissolved and it takes on the characteristics of the solvent.
Explanation:
Hope this helps!
Answer 1) : To rank the species according to the decreasing energy needed to raise the temperature of 10 g of the substance by 25 °C, the oder of energy needed is given below as per their specific heat.
Which requires more energy as per their specific heats;
- water 4.184
- aluminum 0.897
- cast iron 0.460
- Copper 0.385
- Silver 0.235
Answer 2)To rank items as equivalent, overlap them.
The average kinetic energy of the molecules after point D,
The average kinetic energy of the molecules from point B to point C,
The average kinetic energy of the molecules before point A.
Answer:
by the VSEPR theory.
Explanation:
This question is asking for the bond angle of the 
bond in 
. The VSEPR (valence shell electron pair repulsion) theory could help. Start by considering: how many electron domains are there on the carbon atom between these two bond?
Note that "electron domains" refer to covalent bonds and lone pairs collectively.
- Each nonbonding pair (lone pair) of valence electrons counts as one electron domain.
- Each covalent bond (single bond, double bond, or triple bond) counts as exactly one electron domain.
For example, in , the carbon atom at the center of that bond has two electron domains:
- This carbon atom has two double bonds: one
bond and one 
bond. Even though these are both double bonds, in VSEPR theory, each of them count only as one electron domain. - Keep in mind that there are only four valence electrons in each carbon atom. It can be shown that all four valence electrons of this carbon atom are involved in bonding (two in each of the two double bonds.) Hence, there would be no nonbonding pair around this atom.
In VSEPR theory, electron domains around an atom repel each other. As a result, they would spread out (in three dimensions) as far away from each other as possible. When there are only two electron domains around an atom, the two electron domains would form a straight line- with one domain on each side of the central atom. (To visualize, consider the three atoms in this bond as three spheres on a stick. The central 
atom would be between the other atom and the 
atom.)
This linear geometry corresponds to a bond angle of .
Answer:
snail should be at the top
Explanation:
