Answer:
Explanation:
The number on the upper right represents the mass number.
Mass number is the number of protons and neutrons that makes up an atom.
Mass number simply denotes the number of particles in the nucleus of an atom.
Mass number = number of protons + number of neutrons
Number of protons is the number of positively charged particles in the atom
Number of neutrons is the number of uncharged particles.
When the number of protons or number of neutrons changes, the mass number will change.
For example;
O¹⁶₈
Mass number = 16
Atomic number = 8
Answer:
Water and acetone is best by separated through distillation
The correct answer would be option C Acetone and water.
Explanation:
When in a mixture of fluid solution, two liquids are mixed in a form of mixture then these liquid can be separated only one method which is based on the fact. That two different liquids will have two different boiling temperatures which method of separating the Fluids is distillation.
The different liquids that are present in mixture are boiled and the vapours are condensed and the condensed portion is accumulated in another beaker.
Answer:
b. The bromine (Br2) has reacted with the benzene, leaving fewer bromine molecules in solution.
Explanation:
Colour is caused by absorption of light of the frequency of “complementary colours”. Exactly which frequencies molecules absorb depends on the arrangement of electrons. Obviously, to break the Br-Br bond and the C=C bond in the reactants and replace them with two C-H bonds is a significant reordering of electrons and so the new molecule is no longer able to absorb the same frequencies as previously. Hence, a colour change, in this case from orange to colourless.
Answer;
A) Stage 1: Chlorophyll captures light energy. Stage 2: Light energy is converted to chemical energy.
Explanation;
-Photosynthesis is the process by which green plants use energy from the sun, water and carbon dioxide to make organic compounds such as simple sugars together with release of oxygen.
-The process occurs in tow stages; light-dependent stage and light independent stage. During light dependent stage, chlorophyll absorbs sunlight and uses it to split water molecules into hydrogen ions and oxygen atoms. In the light independent stage carbon (iv) dioxide is fixed and the result is organic compound; the light energy is converted to chemical energy.
