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Tems11 [23]
3 years ago
6

Why modern periodic table is superior than Mandeleev's periodic table?​

Chemistry
1 answer:
goblinko [34]3 years ago
7 0

Answer: Modern periodic table is based upon atomic number which is a more fundamental property of the atom. It removes the anomaly about the position or isotopes in the Mendeleev's Table.

Explanation:

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

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Which coefficients will balance this equation? *<br> Ag +<br> C2 &gt;<br> AC2
SCORPION-xisa [38]

Answer:

16Ag + 2C2 ---> 4 Ag4C

Explanation:

Ag + C2 ----> AgC2

The valence of Ag is one

Valence of Carbon is four

A balanced equation would be

16Ag + 2C2 ---> 4 Ag4C

7 0
3 years ago
Describe a way to separate iron filings from sand.<br><br> Enter your answer in the space provided.
Lina20 [59]
Use the magnetic force of iron filings
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3 years ago
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IF 14.07*10^26 molecules of magnesium chloride was produced in the following reaction, how many grams of magnesium reacted?
Wittaler [7]

Answer:

56160grams

Explanation:

First, we need to convert the number of molecules of magnesium chloride (MgCl2) into moles by dividing by Avagadro's number (6.02 × 10^23 molecules)

n = nA ÷ 6.02 × 10^23

n = 14.07 × 10^26 ÷ 6.02 × 10^23

n = 14.07/6.02 × 10^(26-23)

n = 2.34 × 10^3 moles of MgCl2

The balanced reaction given in the question is as follows:

Mg + 2HCl → MgCl2 + H2

If 1 mole of Mg produced 1 mole of MgCl2

Then, 2.34 × 10^3 moles of Mg will also produce 2.34 × 10^3 moles of MgCl2.

Using mole = mass ÷ molar mass (MM)

Molar mass of Mg = 24g/mol

mass = mole × MM

mass = 2.34 × 10^3 × 24

mass = 56.16 × 10^3

mass = 56160grams.

6 0
3 years ago
Which of the equations below represents the correct BALANCED equation?
vovikov84 [41]

Answer:

b. Mg (s) + 2HCl (aq) --> MgCl2 (aq) + H2

Explanation:

A subscript applies only to the element it is attached to while coefficients apply to all elements in a compound.

"a" has 1 atom of each element on the left but 2 Cl on the right.

"c" has 2 Mg, 1 H, & 1 Cl on the left but 1 Mg, 2 H, and 2 Cl on the right.

"d" has 2 atoms of each element on the left but only 1 Mg on the right.

"b" is the only answer with equal numbers of atoms on the right and left sides of the equation.

8 0
3 years ago
Help….? Anyone? It’s a test. 99 points
Crazy boy [7]
Answer:

Cyanobacterium


Explanation:

“Cyanobacterium” is the correct answer, as it has the kingdom bacteria in its name.
7 0
2 years ago
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