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castortr0y [4]
2 years ago
7

The usefulness of mendeleev s periodic table was confirmed by

Chemistry
1 answer:
BigorU [14]2 years ago
7 0
In the table of mendeleev, the lines feature the elements in increasing order of atomic mass<span>.
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hope this helps!
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Look at the data table and graph for the 25-coil electromagnet. With the 1.5 V battery, the
Margarita [4]
Answer a:
<span>A 1.5 V battery, the electromagnet picked up an average of 6 paper clips, while with the 6.0 V battery, an average of 23 paper clips were picked up. Battery of 6.0V is 6.0/1.5 = 4 times stronger than battery of 1.5 V

Answer b: 
</span><span>Ratio of the number of paper clips picked up using the 6.0 V battery to the number picked up using the 1.5 V battery is = 23/6 = 3.8 </span>≈ 4. 

Answer c:
As the voltage power increase, more paper clips were picked up by electromagnet. This indicated that there is a direct relationship. Mathematically it can be expressed as: 

           Voltage Power α Number of paper clips that were picked up

4 0
3 years ago
18. What is the density of a substance with a mass of 0.90 kg and a volume of 1.2 mL?
Anton [14]

Answer:

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Explanation:

4 0
3 years ago
If you add enzyme to a solution containing only the product(s) of a reaction, would you expect any substrate to form?
Masteriza [31]

Answer:

e

Explanation:

<em>Provided the reaction that leads to the formation of the products can proceed in both forward and backward directions, the correct answer would be yes because the reaction will proceed backward until equilibrium is reached.</em>

<u>For a reaction that can proceed both forward and backward, the addition of a catalyst increases the rate of reaction in both directions based on the fact that a catalyst cannot alter the equilibrium of a reaction. </u>

Hence, if an enzyme is added to the product of a reaction that has the potential to proceed in both forward and reverse reactions, a substrate would be expected to form because the reaction will proceed backward until an equilibrium is reached.

The correct option is e.

8 0
2 years ago
John Dalton and Antoine Lavoisier were alchemists who tried to convert diamonds to gold.
larisa86 [58]
This is false. They were both chemists and they made many discoveries such as realizing that charcoal and diamond are different forms of the same element and proposing an atomic theory, but they never tried to turn diamonds to gold.
8 0
3 years ago
Read 2 more answers
A 125 g compound consists of 37% oxygen? What is the mass of oxygen in this compound?
zepelin [54]

19.44%

I think that's the anwer

7 0
3 years ago
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