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3 years ago

What is a substrate?

Chemistry

2 answers:

matrenka [14]3 years ago

8 0

Answer:

In chemistry, in general terms, a substrate is a substance that other substances can react with and cause it to change into something else by the reaction.

Explanation:

The word “substrate” can have different meanings, it depends on which science we are talking about.

In chemistry, in general terms, a substrate is a substance that other substances can react with and cause it to change into something else by the reaction.

In biochemistry, the enzyme substrates are organic materials where an enzyme acts to cause a reaction. The enzyme just acts as a catalyst and is not affected by the reaction, as it does not change its chemical structure.

In biology, a substrate is the material where organisms grow and live in optimal conditions and with the necessary nutrients.

In geology, the layers found beneath the soil are called substrates.

Alex3 years ago

7 0

The chemical species being abserved in a chemical reaction, which up having a reaction with reagent to generate a product

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Which statement accurately describes non renewable energy sources ?

xz_007 [3.2K]

a resource that cannot be replenished in a short period of time

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3 years ago

Read 2 more answers

Enthalpies of reaction calculated from bond energies and from enthalpies of formation are often, but not always, close to each o

jolli1 [7]

The enthalpy change in a reaction is given by-

ΔH°rxn = ∑nΔH°f,products - ∑nΔH°f,reactants

This can be expressed in terms of bond energy as-

ΔH°rxn = BEreactants - BEproducts

Therefore, the calculated bond energy according to the above equation will be-

ΔH°rxn = [ (C-C) + 2(C-O) + 4(C-H) + 2(O-H) ] - [ (C-C) + 2(C-O) + 4(C-H) + 2(O-H) = 0 kJ/mol

<h3>What is enthalpy change?</h3>

Enthalpy change is a measure of the energy emitted or consumed in a reaction. This can be determined using the following equation which involves standard enthalpy of reactant and product formation:

ΔH°rxn = ∑nΔH°f,products - ∑nΔH°f,reactants

<h3>What is bond energy?</h3>

Bond energy is defined as the amount of energy needed to dissociate a mole of molecules into their individual atoms.

Learn more about the Enthalpy Change here:

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1 year ago

What is evaporation? Describe what happens at the molecular level during evaporation.

jasenka [17]

Evaporation happens<span> when atoms or </span>molecules<span> escape from the liquid and turn into a vapor. Not all of the </span>molecules in a liquid have the same energy. <span>Sometimes a </span>liquid<span> can be sitting in one place (maybe a puddle) and its molecules will become a </span>gas<span>. That's the process called </span>evaporation<span>. It can happen when liquids are cold or when they are warm. It happens more often with warmer liquids. You probably remember that when matter has a higher temperature, the molecules have a higher </span>energy<span>. When the energy in specific molecules reaches a certain level, they can have a </span>phase change<span>. Evaporation is all about the energy in individual molecules, not about the average energy of a system. The average energy can be low and the evaporation still continues. </span>

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3 years ago

A hydrogen-filled balloon was ignited and 2.10 g of hydrogen reacted with 16.8 g of oxygen. How many grams of water vapor were f

stiks02 [169]

Hydrogen + oxygen --> water
2,1g + 16,8g = x
x = 18,9g

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2 years ago

A sample of air has a volume of 140.0 mL at 67C. To w

bonufazy [111]

Answer:

What that means is that when pressure and number of moles are kept constant, increasing the temperature will result in an increase in volume. Likewise, a decrease in temperature will result in a decrease in volume. In your case, the volume of the gas decreased by a factor of about 3, from "140.0 mL" to "50.0 mL".

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2 years ago