3 years ago

What is the purpose of constructing a calibration curve

1 answer:

5 0

Answer:

Calibration curves are used to understand the instrumental response to an analyte, and to predict the concentration of analyte in a sample.

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Bromine, a liquid at room temperature, has a boiling point of 58°C and a melting point of –7.2°C. Bromine can be classified as a

andreev551 [17]

Answer:

Pure substance.

Explanation:

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3 years ago

For the reaction represented by the equation 2KClO3 → 2KCl + 3O2, how many grams of potassium chlorate are required to produce 1

Vikentia [17]

The grams of potassium chlorate that are required to produce 160 g of oxygen is 408.29 grams

<u><em>calculation</em></u>

2 KClO₃→ 2 KCl + 3O₂

Step 1: find the moles of O₂

moles = mass÷ molar mass

from periodic table the molar mass of O₂ = 16 x2 = 32 g/mol

moles = 160 g÷ 32 g/mol = 5 moles

Step2 : use the mole ratio to determine the moles of KClO₃

from equation given KClO₃ : O₂ is 2:3

therefore the v moles of KClO₃ = 5 moles x 2/3 = 3.333 moles

Step 3: find the mass of KClO₃

mass= moles x molar mass

from periodic table the molar mass of KClO₃

= 39 + 35.5 + (16 x3) =122.5 g/mol

mass = 3.333 moles x 122.5 g/mol =408.29 grams

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3 years ago

When a pure substance was heated a chemical reaction occurred, and a student obtained another solid and a gas, each of which was

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The original solid is not an element

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4 years ago

Consider the following reversible reaction. What is the equilibrium constant expression for the given system?

ladessa [460]

The question is incomplete. Complete question is attached below
..........................................................................................................................

Answer:
Equilibrium constant (K) is defined as the ratio of concentration of product to concentration of reactant.

For the reaction: 2H2O(g) ↔ 2H2(g) + O2(g)

Equlibrium constant = $\frac{[H_2]^2[O_2]}{[H_20]^2}$

[ ] bracket in above expression indicates concentration.

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3 years ago

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The group of cells that are organized into columns and rows

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Explanation:

vertical columns and horizontal rows, hope it helps

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3 years ago