Answer:
In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Na2SO4 and H2O are the products.
Answer: option a: 1,1,1
Explanation:
1) The chemical equation given is wrong. This is the right chemical equation
<span>CaCO3(s) → CaO(s) + CO2(g)?
2) To balance you start by counting the number of atoms of each element on both sides
element number of atoms conclusion
reactant side product side
Ca 1 1 balanced
C 1 1 balanced
O 3 1+2 = 3 balanced
3) Therefore all the elements are balanced and the coefficients are 1, 1, and 1.
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Answer:
Cell membranes
Explanation:
Cell membranes is a feature that is common to prokaryotic and eukaryotic cells.
B. Grass to grasshoppers to bird to fox
Hope that helps