A substance is a sample of a specific type of matter, such as:
-water
-dirt
-
A mixture is a combination of two or more contrasting substances, some mixtures fully combine to create a new substance and some mixtures simply create combinations such as:
-A mixture of dirt + water creates mud which is an example of a new substance
-A mixture of cheese + ham + bread creates a sandwich which is an example of a combination
Hope this helps :)
Answer:
3 Shells
Explanation:
2 electrons in shell one, 8 in shell two and only 1 in shell three.
Answer:
Theoretical value is the value a scientist expects from an equation, assuming perfect or near-perfect conditions. Experimental value, on the other hand, is what is actually measured from an experiment. Rarely (in fact never) are these numbers the same.
Take the area of a sheet of paper. I know that the area of a rectangle can be found by multiplying the lengths of both sides together. I can assume an 8.5x11 sheet, so I calculate exactly 93.5 square inches. This is my theoretical value. When I actually do the measurements on my paper, it turns out my paper has been slightly cut on one end, or I’m measuring with a shoddy ruler. Therefore, I might measure only 92.8 square inches. This is my experimental value. See thats it’s close, but not exact.
Expanding on this concept, quantum mechanics is so widely accepted in the scientific community because many theoretical values calculated by mathmaticians concurred with experimental values to many, many decimal places. These would be constants such as Plank’s Constant, energy levels of harmonic potentials, and energy levels of the hydrogen atom.
Explanation:
Answer:
Magnesium reacts in strong and weak acids.
Explanation:
Acid solutions also, have pH values, less than 7. This is the correct answer, to this question.
Hope this helps!!!
Kyle.
Answer:
law of conservation of mass
Explanation:
self explanatory
