Which quantity represents the number of protons in an atom?(a) atomic number
(b) oxidation number
(c) number of neutrons
(d) number of valence electrons
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The oxidation number and valence electrons can vary depending on whether it is an ion or not. The number of neutrons can also vary depending on what isotope the atom is. However, the number of protons cannot be changed without changing the identity of the base atom itself.
Atomic number = no. of protons = no. of electrons
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1. A scientific hypothesis can become a theory if ______.A) the entire community accepts itB) the hypothesis is tested extensively and competing hypothesis are eliminatedC) there are no other competing hypothesisD) the hypothesis can be tested at least once2) A preliminary untested explanation that tries to explain how or why things happen in the manner observed is a scientific ________.A) lawB) theoryC) factD) hypothesis
How is weathering related to the geologic cycle
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Answer:
Polygenic Inheritance is where one trait (for example, eye color) is determined by multiple genes (two or more).
This typically happens when there is a wide variety of this trait (e.g. height, eye color, hair color, skin color, etc.).
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Or consisting of a single cell.
(2) blue (4) yellow
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Answer is (2) - blue.
Thymol blue is a pH indicator which 3 colors according to the pH.
Thymol blue shows red color at below pH than 1.2 and shows yellow color at the pH between 2.8 and 8.0. For the pH above 9.6, thymol blue shows blue color.
Hence, the thymol blue has 2 pH ranges as 1.2 - 2.8 and 8.0 - 9.6.
Since, pH = 11 is above the pH = 9.6, thymol blue shows blue color.
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One example would be the dissolving of molecules with water so that they can be transported.
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Answer: NaOH and HCl are the reactants for the reaction described.
Explanation:
Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. These are written on left side of the arrow.
Products are defined as the substance which are formed at the end of the chemical reaction. These are written on the right side of the arrow.
For the reaction of sodium hydroxide and hydrochloric acid, the equation represents:
Here, NaOH and HCl are reactants.
The above reaction is a type of neutralization reaction.