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4 years ago

When balancing a chemical equation, what are the large numbers that we adjust?

Chemistry

1 answer:

Nata [24]4 years ago

6 0

Answer:

Coefficients

Explanation:

Chemical equations are first written as a skeleton equation, which includes how many atoms each element and compound has. Skeleton equations are not 'balanced' because the number of atoms of each element on the left side (reactants) is not equal to the right side (products).

To balance a chemical equation, you can write coefficients in front of single elements and compounds. The coefficient multiplies with each single element and with each element in the compound.

For example, in this skeleton equation:

H₂ + Cl₂ => HCl

Reactants: Products:

2 hydrogen 1 hydrogen

2 chlorine 1 chlorine

Write the coefficient 2 in the products.

H₂ + Cl₂ => 2HCl

Now both reactant and product sides have 2 chlorine and 2 hydrogen, so the equation is balanced.

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What are the 5 types of chemical reactions?

True [87]

Combination or Synthesis Reaction. A combination of synthesis reaction is one. where a new product is synthesized by combination of two or three reactants.

Decomposition Reaction

Displacement or Replacement Reaction

Acid Base Reaction

Combustion Reaction

7 0

4 years ago

Sonni added 23.79 mL of KOH to 20.00 mL of 0.393 M HF until the equivalence point was reached. What is the concentration of conj

madreJ [45]

Answer:

0.1795 M

Explanation:

From the given information:

The equation is:

$\mathbf{HF_{(aq)}+ KOH_{(aq)} \to KF _{(aq)} + H_2O}$

From the above equation, the reaction will go to completion due to the strong base:

At the equivalence point, moles of acid (HF) will be equal to moles of base (KOH)

$\text{Number of moles = Volume} \times Molarity$

Thus. since moles of HF = moles of KOH

Then; 0.020 × 0.393 M = 0.02379 × (x) M

(x) M = $\dfrac{0.02 \times 0.393 \ M}{0.02379}$

(x) = 0.3304 M

Thus, the molarity of KOH = 0.3304 M

Using the balanced neutralization reaction;

moles of HF = moles of KOH = moles of conjugate base = 0.00786 mol

∴

Volume = 0.020 L + 0.02379 L

Volume = 0.04379 L

Volume of the solution = 0.04379 L

Therefore; Molarity = $\dfrac{moles}{volume}$

Molarity = $\dfrac{0.00786 \ mol}{0.04379 \ L}$

Molarity = 0.17949 mol/L

= 0.1795 M

7 0

3 years ago

Which neutral element has the following electron configuration? 1 s^2 2s^2 2 p^6 3 s^2 3 p^41s 2 2s 2 2p 6 3s 2

Alinara [238K]

S, Sulfur. An easy way to find the answer is simply looking at the last set of numbers.

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3 years ago

How does distillation work.

Usimov [2.4K]

Answer:

Distillation is an important commercial process that is used in the purification of a large variety of materials. However, before we begin a discussion of distillation, it would probably be beneficial to define the terms that describe the process and related properties. ... Elevation of the boiling point with an increase in external pressure, while important in cooking and sterilizing food or utensils, is less important in distillation.

Explanation:

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2 years ago

a reaction in which one element replaces another on a compound or in which two elements in different compounds trade places is c

lilavasa [31]

Single Replacement and Double Replacement reactions

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4 years ago