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kolezko [41]
3 years ago
14

3. If there were multiple products comment on finding the mixture melting point of the products. Does your sample appear to be a

mixture or pure
Chemistry
1 answer:
Eduardwww [97]3 years ago
5 0

Answer:

If there were multiple products, we can take each product and mixed with a sample of a pure compound that we suspect might be the same as the product. Then, we taking the melting point of this mixture that contains one of our product and pure sample. Then, we can observe the change in melting point, if there is no change in melting point or the melting stays in the same range of the pure compound. Then, the that product along with the pure sample are actually the same compound, not a mixture of two compounds. However, if the melting point for our pure sample compound changed or didn't stay in the same range after the mixing with on of our products. then we can conclude that this product and the pure sample are completely different compound, and indeed they are a mixture.

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Mamont248 [21]

Answer:

2 groups

Explanation:

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6 0
3 years ago
HELPPPPPPPP
tangare [24]

Answer:

Hint As we know that the concept of mole is mainly to calculate the entities at the microscopic level that is ions, particles, molecules, electrons or atoms etc. It is found that mole is having the symbol mol.

Complete Step by step solution:

- As we are being provided with the information that there is 15 grams of lithium. As we know that the molar mass of lithium is 6.94 g/mol.

- As we know that mole is the amount of substance that has entities as there are atoms exactly in 12 g of carbon isotope. We should note that the number of entities in one mole is important because it is called the Avogadro constant. The numeric value of this constant is 6.022×1023.

- Firstly we will write the given mass as:

156.022×1023

- Now, we can find the number of moles by the formula of moles that is given mass of the substance divided by the molar mass of the substance.

moles=given massmolar mass⟹156.022×10236.94⟹15×6.946.022×1023⟹17.28×10−23moles

- Hence, we can conclude that there are 17.28×1023 moles in 15 grams of lithium.

Note:

- If we want to calculate the number of moles of an individual entity, like say A, that is dissolved in a solution of an entity say B (A+B), then we can do so by using the concept of mole fraction. The formula of mole fraction is given as moles of a substance divided by the total number of moles.

- We should not forget to write the unit after solving the solution. Explanation:

8 0
2 years ago
How are electrons excited and what happens when the electrons relax
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goblinko [34]

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