a. Smallest basic units of matter
<u>Atom</u>: An atom is the smallest particles of a substance which may or may not exist in free state but takes part in chemical reactions.
<u>Molecule</u>: A molecule is a substance which exists in free state but doesn't take part in chemical reactions.
<u>Laws</u><u> </u><u>of</u><u> </u><u>chemical</u><u> </u><u>combination</u><u>:</u><u>-</u>
- Law of conservation of mass
- Law of constant proportions
- Law of multiple proportions
- Law of reciprocal proportions
Answer:
After the solution is heated, but before additional solute is added
Explanation:
An unsaturated solution is a solution that contains less solute than it can normally hold at a given temperature. Hence an unsaturated solution can still dissolve more solute.
When the solution is heated, the saturated cold solution becomes an unsaturated hot solution which is capable of dissolving more solute at this point.
Once more solute is dissolved, the solution becomes saturated again just before it begins to cool since no more solute dissolves in the solution at some point before cooling and addition of seed crystals.
Answer:
Elements in the same period have the same (number of electron shells)
Answer:
25,050 calories.
Explanation:
A calorie is the amount of energy needed to raise the temperature of one gram of water 1 degree centigrade. If we are raising 835 grams of water 30 degrees then we multiply 835*30 to get 25,050 calories.
