Answer:
True
Explanation:
The complete question is:
"A reaction contains two reactants, A and B. If A is doubled, there will be a greater number of effective collisions between reactants. TRUE FALSE"
Collision Theory indicates that chemical reactions take place because molecules, atoms or ions collide with each other.
Furthermore, the molecules must collide effectively, that is, not all reagent collisions lead to product formation. Effective shock means that the reagent molecules have enough kinetic energy at the time of the shock for their bonds to break and product bonds to form. In addition, the molecules of the reagents must be properly oriented for the reaction to take place.
As the concentration increases, the number of shocks increases. In other words, by increasing the concentration of the reactants, the probability of collision between their molecules increases, and therefore the number of effective collisions.So the statement is true-
The answer is that the substance loses or gains heat.
Answer:
The heat of the substance changes.
Explanation:
Substances can be made to change phases by fluctuating the temperature, the pressure, or both.
Answer: non metal
Explanation:
Nonmetals are dull, possess high ionization energies and electronegatives and are typically poor electricity conductors as they're insulators.
Non metals are also brittle and possess low melting point. Therefore, with the explanation, the sample is most likely a non metal.
The sample described is most likely a sulfur solid.
The sample described in the question, which is pale yellow, brittle, and has no shine, is most likely a sulfur solid. Sulfur is a chemical element that is commonly found in its solid form and has a pale yellow color. It is brittle, meaning that it shatters easily upon impact, and it does not have the characteristic shine that metals have.
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(2) a solution (4) an isomer
A sample composed only of atoms having the same atomic number is classified as " element".
A pure substance made up entirely of atoms with almost the same number of protons in respective nuclei was known as an element.
Atoms are "the fundamental building components of matter," according to Wikipedia. It is the lowest fundamental unit of matter which thus possesses chemical element qualities.
A sample composed only of atoms having the same atomic number is classified as " element".
Therefore, the correct answer will be option (3).
To know more about atom and element.
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Hydrogen bonds between water molecules occur because of the polarity of the water molecule.
A hydrogen bond is a weak bond that forms between a hydrogen atom that is covalently bonded to a highly electronegative atom and another highly electronegative atom in the same or a different molecule.
A water molecule consists of two hydrogen atoms and one oxygen atom. The hydrogen atoms are bonded to the oxygen atom, but the electrons in the covalent bonds are not shared equally. This results in a partial negative charge on the oxygen atom and a partial positive charge on the hydrogen atoms.
When two water molecules are close together, the partial positive charge on one hydrogen atom is attracted to the partial negative charge on the oxygen atom of the other molecule. This attraction is called a hydrogen bond.
Therefore, due to polarity of the water molecule, it results into hydrogen bonds between water molecules.
Learn more about hydrogen bond here:
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