Answer:
D = m/v.
Explanation:
The density of a substance is the relationship between the mass of the substance and how much space it takes up (volume). The mass of atoms, their size, and how they are arranged determine the density of a substance. Density equals the mass of the substance divided by its volume;
Answer:
The answer for the frist one is C is a chemical property and D is a physical property. The sconed one this implies both the atoms have the same nucleus but different charges so it can be concluded that they are both the atoms of the same element but one of them is electrically neutral and the other has stable electronic configuration.
Explanation:
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Just add 2 in front of the right side equation Mg+2HF-2MgF+H2
The chemical reaction comprises chemical changes, that is, changes in the composition of the molecules, the formation of new compounds. As a consequence of the chemical reaction, new substances are produced, which cannot be reversed by any physical means.
One of the best ways to identify a chemical reaction is observing the change in color, or changes in the color of the substance. This is one of the most general observable chemical reaction known, the basic example is the changing of litmus paper color when it comes in contact with the acid.
Answer:
hydrocarbon
Explanation:
these are called hydrocarbons