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kifflom [539]
3 years ago
7

Is the periodic table organized by ions and what does form the same kinds of ions mean?

Chemistry
1 answer:
Elina [12.6K]3 years ago
4 0
The periodic table is organized by the atomic mass of the elements. It means if the element is in Group 2a in the periodic table, it has 2+ ions.
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What mass of oxygen gas contains the same number of moles as 56g of sulphur? (Relative atomic mass: S = 32, O = 16) A) 0.56g B)5
IrinaVladis [17]

Answer:

The answer is option C

Explanation:

To calculate the mass of oxygen gas we must first find the number of moles of sulphur

Molar mass = number of moles (n) / mass

n = mass / Molar mass

From the question

Molar mass (M) of Sulphur = 32g/mol

mass = 56g

n( Sulphur) = 56/32 = 1.75mol

Since the moles of oxygen and sulphur are the same

M(O2) = 16 × 2 = 32g/mol

Mass of oxygen = molar mass × moles

= 32 × 1.75

<h3>= 56g</h3>

Hope this helps you

8 0
3 years ago
A sample contains 1.29×1022 atoms of Cs. Calculate the amount of Cs.
tester [92]

There are 0.0214 mol Cs in 1.29×10²² atoms Cs.

Use <em>Avogadro’s number</em> to convert atoms of Cs to moles of Cs.

Moles of Cs = 1.29×10²² atoms Cs × (1 mol Cs /6.022 × 10²³ atoms Cs) = 0.0214 mol Cs

4 0
4 years ago
Heating gas to create plasma can yield
topjm [15]
Hey there, The answer is A. Free electrons.
4 0
3 years ago
What is the number of orbit for calcium
CaHeK987 [17]
It has 20 electrons
7 0
3 years ago
How many molecules are in 2.5 mol of NaCl?
Vlada [557]

Answer:

1.51 x 10²⁴molecules

Explanation:

Given parameters:

Number of moles of NaCl  = 2.5moles

Unknown:

Number of molecules  = ?

Solution:

The number of molecules that can be found in a given mole is given as the Avogadro's constant;

       1 mole of substance  = 6.02 x 10²³ molecules

       2.5 mole of NaCl  = 2.5 x 6.02 x 10²³ molecules

                                       = 1.51 x 10²⁴molecules

6 0
3 years ago
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