involves the probability of finding an electron in a certain position. thats the answer
primary consumer
tertiary consumer
secondary consumer
and reactants are equal.
B. The rate of the forward reaction equals the rate of the reverse reaction and the
concentrations of products and reactants are equal.
C. The rates of the forward and reverse reactions are zero and the concentrations of products
and reactants are constant.
D. The rate of the forward reaction equals the rate of the reverse reaction and the
concentrations of products and reactants are constant.
The best statement which describes a reaction in a state of equilibrium is letter D. The rate of the forward reaction equals the rate of the reverse reaction and the concentrations of products and reactants are constant.
>Chemical equilibrium is defined as the state in which both reactants and products are present in concentrations which have no further tendency to change with time. This state results when the forward reaction proceeds at the same rate as the reverse reaction. The reaction rates of the forward and backward reactions are generally not zero, but equal. Thus, there are no net changes in the concentrations of the reactant(s) and product(s).
The number of molecules in 210 grams of H₂O is 72.48 x 10²⁴.
The mole is a SI unit of measurement that is used to calculate the quantity of any substance. The number of models of any substance can be calculated by dividing the mass by the molar mass of the substance or compound.
Mole = mass / molar mass
Given the mass of wateris 210 grams
The molar mass of water is 18.01g/mole
The mass and the molar mass will be divided.
210 / 18.01g = 11.653 mole
Now, here 1 mole is 6.22 x 10²³ molecules, so the 6.22 x 10²³ will be multiplied by the 11.653 to get the molecules of 210-gram water.
1 mole has 6.22 x 10²³ molecules
11.653 mole x 6.22 x 10²³ = 72.48 x 10²⁴
Thus, the number of molecules of H₂O is 72.48 x 10²⁴.
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chemical reactions?
Democritus, an ancient Greek philosopher who lived around 460-370 BCE, made significant contributions to the early development of the atomic theory.
His ideas laid the foundation for the later development of modern atomic theory. Here's how Democritus contributed to the atomic theory and the structure of the atom:
Concept of Indivisible Atoms: Democritus proposed that everything in the physical world was made up of tiny, indivisible particles called "atoms." The word "atom" itself is derived from the Greek word "atomos," which means "indivisible" or "uncuttable." Democritus believed that atoms were the fundamental building blocks of matter and that they could not be divided into smaller parts.
Various Shapes and Sizes: Democritus suggested that atoms could vary in shape and size. He proposed that different substances were composed of atoms with different shapes, which explained the diversity of matter in the universe.
Empty Space: Democritus also introduced the idea of "void" or empty space between atoms. He believed that atoms were in constant motion and that the void allowed for this motion.
Lack of Experimental Evidence: It's important to note that while Democritus made these philosophical speculations about atoms, he did not provide any experimental evidence to support his ideas. His atomic theory was largely based on reasoning and thought experiments rather than empirical data.
Democritus' atomic ideas were influential, but they were largely overshadowed by the more prominent theories of his contemporary, Aristotle, which emphasized the existence of four fundamental elements (earth, water, air, and fire). It wasn't until much later, in the 19th century, that John Dalton and others developed the modern atomic theory, which incorporated experimental evidence and refined our understanding of atoms as the smallest units of matter that retain the properties of chemical elements.
Democritus contributed to the atomic theory by proposing the concept of indivisible atoms as the fundamental building blocks of matter, but his ideas lacked experimental support and were not widely accepted in his time.
CH3CH(CH3)CH2CH(CH3)2
The name of the given Alkane molecule is 2,4-di-methyl Pentane. It can be named with the help of IUPAC Nomenclature technique.
IUPAC is an acronym for International Union of Pure and Applied Chemistry, which is a globally recognize international chemistry standards organization that has named all the chemical organic substances in a systematic manner
All deviations, either multiple bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes according to a specific set of priorities.
Therefore, The name of the given Alkane molecule is 2,4-di-methyl Pentane. It can be named with the help of IUPAC Nomenclature technique.
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Answer:
answer is C
Explanation: