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vichka [17]
4 years ago
12

Describe dmitri mendleev 's periodic table ​

Chemistry
1 answer:
ELEN [110]4 years ago
8 0

Answer:

He noted that repeating patterns of behavior could be seen in the way elements combined with each other. He included holes in his table and predicted their properties. He is recognized as the father of the modern periodic table.**Hope it was right. And that it helped!**

Explanation:

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Which structure is the sun located
lana [24]
It is located in the inner rim of the Orion arm!
3 0
3 years ago
Upon decomposition, one sample of magnesium fluoride produced 2.15 kg of magnesium and 3.36 kg of fluorine. A second sample prod
Eva8 [605]

Answer:

The second sample will produce 1563 grams of fluorine (F2)

Explanation:

The reaction will be MgF2 → Mg + F2

The stoichiometry ratio of MgF2 and F2 is 1 : 1.

That means for 1 mole of MgF2 consumed there is 1 mole of F2 produced.

The first sample produces 2.15 kg of magnesium and 3.36 kg of fluorine

The second sample produced 1 kg of magnesium and x kg of fluorine

This we can show in the following equation =

2.15kg / 3.36 kg = 1kg / x

2.15/3.36 = 0.63988

0.63988 = 1/ x

x= 1/0.63988  = 1.563 kg

1.563kg = 1563 grams

The second sample will produce 1563 grams of fluorine (F2)

8 0
3 years ago
a student used 10 mL water instead of 30 mL for extraction of salt water from mixture. how may this change the percentage of NaC
ch4aika [34]
If a<span> student used 10 mL water instead of 30 mL for extraction of salt water from mixture, the extraction of salt will be lesser than compared to using 30 mL since less solute will dissolve in 10 mL.</span>
5 0
4 years ago
Explain why boiling point and melting point can be used as a way to check purity.
Ierofanga [76]

Answer:

Pure solid and liquid compounds possess sharp melting and boiling points.

Explanation:

Therefore, melting and boiling points of a compound can be used as a criteria of purity. ... Sometimes during cooling minute quantity of the substance (solid which is being purified) is added to the solution to facilitate the initial crystallisation.

4 0
2 years ago
In an exothermic reaction, an increase in temperature favors the formation of products.
pentagon [3]
False, in an exothermic reaction, an increase in temperature does not favor the formation of products. Instead, it favors the backward reaction. An exothermic reaction is a reaction where energy is transferred from the system out to the environment.
7 0
4 years ago
Read 2 more answers
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