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3 years ago

What does the part of the equation to the left of the arrow represent in a chemical formula

1 answer:

8 0

In a chemical formula, the part to the left of the arrow represents the reactants. The reactants are all the chemical elements that will react with each others to make the products (which will be on the right part of the arrow).

Example:
H2 + O2 --> H2O

H2 and O2 are the reactants (on the left part of the arrow) and H2O is the product (on the right side of the arrow)

Hope this helps! :)

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What type of critial thinking is important in agriscience

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2 years ago

How many atoms are in 0.909 moles of silver?

BabaBlast [244]

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5.47 x 10^23 atoms in Ag (sliver)

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3 years ago

10.0 grams of octane are burned in a bomb calorimeter containing 2.00 × 102 g H2O. How much energy, in kilocalories, is released

vodomira [7]

you wanna use q=m*C*\Delta T\;

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4 years ago

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Mamont248 [21]

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3 years ago

The percent yield of a chemical reaction is

Sergio039 [100]

Answer:

The correct choices are:

using accurate measurements

using pure chemicals

performing the reaction under the most ideal conditions

Explanation:

The theoretical yield is the maximum amount of product that could be obtained by the chemical reaction, from a given amount of reactants. You calculate the theoretical yield using the stoichiometry coefficients of the balanced chemical equation.

The percent yield is the ratio of the actual yield (the actual amount obtained) of a product to the theoretical yield for the same product, expressed as a percentage (i.e. multiplied by 100).

percent yield = actual yield × 100 / theoretical yield

As the actual yield decrease (the numerator of the ratio), the percent yield decrease.

To increase the percent yield it is important:

using accurate measurements

using pure chemicals

performing the reaction under the most ideal conditions

Using accurate measurements: if you do not add the correct amounts of each reactant, then the product obtained will not be what you can predict from the theoretical calculations and you will be wasteing one or other reactant, without reaching the maximum yield possible.

Using pure chemicals: if the chemicals are not pure, the amount of actual reactants will be lower than they should be, leading to a lower actual yield.

Performing the reaction under the most ideal conditions: the actual rate of reactions depend on the conditions: temperature and pressure are the most commons. Since, temperature and pressure may change that rate of reactions, you should find and use the most ideal conditions to get the greatest actual yield.

Adding water, can just dilute the reactants and would decrease the rate of reaction, which would not be helpful to increase the yield.

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3 years ago

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