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Enthalpy changes in chemical equations are represented by the heat term (ΔH) and are included on the reactant and product sides to account for energy changes during a reaction. If heat is absorbed during a reaction, it is represented as a positive value, and if heat is released, it is represented as a negative value.
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When can a compound be treated like element when balancing chemical equations?
A compound can be treated as an element when balancing chemical equations if it is a polyatomic ion that remains unchanged throughout the reaction. This is done to simplify the equation by treating the polyatomic ion as a single entity, similar to how an element is treated.
Yeasts are growing in two dishes you treat one dish with a chemical that blocks DNA replication but forget to label it How can you identify the treated dish?
You can identify the treated dish by observing which dish has slower or inhibited growth of the yeasts compared to the untreated dish. The dish that was treated with the chemical that blocks DNA replication will show reduced growth or no growth of yeasts due to the disruption in cell division.
Why is it important for scientist waterproof is tested One fabric couch is treated with the chemical and another identical couch is not Which is the experimental group?
Testing the waterproofness of a fabric is important to ensure its durability and functionality in various conditions. The fabric couch treated with the chemical is the experimental group, as it is the one that is being altered or manipulated to test the effects of the waterproofing treatment.
Which is olive drab and chemically treated to color when it comes in contact?
The material you are referring to is likely a chemical agent detection paper called M8 paper. It is olive drab and treated with chemicals that change color when in contact with certain chemical warfare agents, aiding in their detection.
How is a polyatomic written when being treated as one item?
A polyatomic ion is written as a single charged particle enclosed in parentheses. For example, the nitrate ion (NO3-) is treated as one unit in chemical reactions.
When can a compound be treated like element when balancing chemical equations?
A compound can be treated as an element when balancing chemical equations if it is a polyatomic ion that remains unchanged throughout the reaction. This is done to simplify the equation by treating the polyatomic ion as a single entity, similar to how an element is treated.
What is the chemical used in chemical treated lumber?
See this link.
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When can a compound be treated as an element when balancing chemical equations?
You can treat a polyatomic ion as an element when balancing equations. The following example involves the polyatomic ion NO3-. Notice that the entire polyatomic ion is placed in parentheses and given its own subscript. 2Al(s) + 3Mg(NO3)2(aq) --> 2Al(NO3)3(aq) + 3Mg(s)
What is untreated cotton?
Cotton not treated with pesticides or other chemical agents.
How do you treat melasma?
Melasma is treated with a variety of skin creams such as hydroquinone, tretinoin, and corticosteroids. It can also be treated with chemical peels, microdermabrasion, and dermabrasion.
How can you tell if a 2x4 is treated?
To determine if a 2x4 is treated, look for a stamp or label indicating it has been pressure-treated with chemicals to resist decay and insects. Additionally, treated wood may have a greenish tint or a slight chemical odor.
Why does pressure treated wood have holes?
Pressure treated wood is soaked in a special chemical to prevent rotting. Pressure treated wood products have "holes" in them, so the liquid can be readily absorbed for optimal saturation.
An antibody can be treated to attach to a new antigen because the changes made to the?
variable region
How do you cure water before drinking?
If by "cure" you mean make safe to drink, it can be boiled, or treated with a disinfecting chemical, such as chlorine. It can also be treated with ultraviolet light.
How can you determine if lumber is treated?
To determine if lumber is treated, you can look for a stamp or label on the wood indicating that it has been treated with preservatives. Additionally, treated lumber may have a greenish tint or a chemical odor. You can also ask the supplier or check the product specifications for information on whether the lumber has been treated.
Must the flow of a compressible fluid be treated as compressible?
No, if the pressure difference results in a density change of less than thirty percent (30%) the fluid may be treated as incompressible by assuming the density of the fluid equals the average density and that the density is constant. Source: Chemical Engineering Fluid Mechanics, Ron Darby, 2nd edition, page 115.
