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padilas [110]
3 years ago
7

Define a catalyst and explain a catalyst's role in a chemicalreaction.

Chemistry
1 answer:
satela [25.4K]3 years ago
7 0

Answer:

Catalyst is referred to as the substance used in the reaction to speed up or to increase the efficiency of the reaction. the catalyst itself does not alter any change during the reaction. As catalyst itself is not the reactant or product thus it does not appear in a chemical reaction

Explanation:

Catalyst is referred to as the substance used in the reaction to speed up or to increase the efficiency of the reaction. the catalyst itself does not alter any change during the reaction. As catalyst itself is not the reactant or product thus it does not appear in a chemical reaction

In a chemical reaction, the catalyst is used to decrease the activation energy thus to provide or enhance the reaction mechanism to the reaction.

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How much heat energy must be absorbed to completely melt 35.0 grams of H2O(s) at 0°C?
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Find the empirical formula of the following compounds:
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The empirical formula of the following compounds 0.903 g of phosphorus combined with 6.99 g of bromine.

<h3>What is empirical formula?</h3>

The simplest whole number ratio of atoms in a compound is the empirical formula of a chemical compound in chemistry. Sulfur monoxide's empirical formula, SO, and disulfur dioxide's empirical formula, S2O2, are two straightforward examples of this idea. As a result, both the sulfur and oxygen compounds sulfur monoxide and disulfur dioxide have the same empirical formula.

<h3>How to find the empirical formula?</h3>

Convert the given masses of phosphorus and bromine into moles by multiplying the reciprocal of their molar masses. The molar masses of phosphorus and bromine are 30.97 and 79.90 g/mol, respectively.

Moles phosphorus = 0.903 g phosphorus \frac{mol phosphorus}{ 30.97 g phosphorus}= 0.0293 mol

Moles bromine 6.99 g bromine\frac{mol bromine}{79.90 g bromine}=0.0875 mol

The preliminary formula for compound is P0.0293Bro.0875. Divide all the subscripts by the subscript with the smallest value which is 0.0293. The empirical formula is P1.00Br2.99 ≈ P₁Br3 or PBr3

To learn more about empirical formula visit:

brainly.com/question/14044066

#SPJ4

8 0
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