Answer:
C. Energy is absorbed and released during chemical reactions,
Explanation:
All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy.
The diagrams show the partides of a substance
Which statement best describes the process that the diagrams show?
O A solid loses fonetic energy to become a loud and then becomes a gas
O A solid sains kinetic energy to become a loud and then becomes a gas
O Asas loses tonerc energy to become a loud and then becomes a solid
O A gas as kinetic energy to become a loud and then becomes a solid
Answer:
B. A solid gains kinetic energy to become a liquid and then becomes a gas.
Help PLZ!!! Which statement accurately represents the arrangement of electrons in Bohr’s atomic model? -Electrons move around the nucleus in fixed orbits of equal levels of energy. -Electrons move around the nucleus in fixed orbits of increasing levels of energy. -Electrons move randomly in the relatively large space surrounding the nucleus. -Electrons vibrate in fixed locations around the nucleus.
Answer:
electrons move around the nucleus in fixed orbits of equal amounts of energy
Explanation:
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option B.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
According to Bohr’s atomic model, electrons move around the nucleus in fixed orbits of increasing levels of energy.
Therefore, the correct option is option B that is electrons move around the nucleus in fixed orbits of increasing levels of energy.
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Why is warm honey easier to pour than cold honey?
A) Increasing the temperature breaks the molecules down into atoms, which are smaller.
B) Increasing the temperature increases the kinetic energy of the molecules, which makes it easier to overcome the attractive forces between molecules.
C) Increasing the temperature converts the sugars into water, which flows easier.
D) Increasing the temperature makes the honey more viscous.
Explanation:
Warm honey is easier to pour because the molecules or what we call as atoms are tightly packed in solids and when solids convert into liquid they flow easily.I HOPE YOU MIGHT FIND THIS VERY HELPFULLWITH LOVE FAULTYDEVILLOVE YA......warm honey easier to pour than cold honey due to Increasing the temperature converts the sugars into water, which flows easier.
What are the components of honey ?
Honey contains sugar, water and other ingredients, where Sugar gives gives sweetness, water maintain fluidity, and other components are present in a least amount and the differences are the color, aroma and taste.
Three types of sugar such as fructose (41%), grape sugar or glucose about 34% and sucrose contain 1 and 2%, other components include minerals, proteins, acids and undetermined matter.
Minerals constitute 3.68%, increase the value of honey for human consumption and the most common minerals are potassium, chlorine, sulfur, calcium, sodium, phosphorus, magnesium, silicon, iron, manganese and copper.
Proteins are collected from nectar and pollen which is the integral parts of plants, acids are also the component, vitamn C and some B complex vitamins such as riboflavin, pantothenic acid, pyridoxine, biotin, nicotinic acid are present.
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Which energy profile best shows that the enthalpy of formation of CS2 is 89.4 KJ/mol?
Answer:
Option C. Energy Profile D
Explanation:
Data obtained from the question include:
Enthalpy change ΔH = 89.4 KJ/mol.
Enthalpy change (ΔH) is simply defined as the difference between the heat of product (Hp) and the heat of reactant (Hr). Mathematically, it is expressed as:
Enthalpy change (ΔH) = Heat of product (Hp) – Heat of reactant (Hr)
ΔH = Hp – Hr
Note: If the enthalpy change (ΔH) is positive, it means that the product has a higher heat content than the reactant.
If the enthalpy change (ΔH) is negative, it means that the reactant has a higher heat content than the product.
Now, considering the question given, the enthalpy change (ΔH) is 89.4 KJ/mol and it is a positive number indicating that the heat content of the product is higher than the heat content of the reactant.
Therefore, Energy Profile D satisfy the enthalpy change (ΔH) for the formation of CS2 as it indicates that the heat content of product is higher than the heat content of the reactant.