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Rudik [331]
3 years ago
11

Why elements are arranged according to atomic number rather than atomic mass in the periodic table

Chemistry
1 answer:
Rama09 [41]3 years ago
4 0

Answer:

Mendeleev placed certain elements not in order of increasing atomic mass so that they could fit into the proper groups (similar elements have similar properties) of his periodic table.

Explanation:

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2 KClO2 (s) 0 2 KCl (s) + 3 02 (g)
Nonamiya [84]

Volume of O2 : 168 L

<h3>Further explanation</h3>

Given

Reaction

2 KClO3 (s) → 2 KCl (s) + 3 O2 (g)

5 moles of KCIO3

Required

volume of O2

Solution

From the equation, mol O2 :

= 3/2 x moles KClO3

= 3/2 x 5 moles

= 7.5 moles

Assumed at STP( 1 mol = 22.4 L) :

= 7.5 x 22.4 L

= 168 L

5 0
3 years ago
The maximum oxygen uptake is known as the __________.
andrezito [222]
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4 0
3 years ago
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Calculate the gravitional force in between two object of mass 25kg and 20kg if distance between them is 5m?
astraxan [27]

Answer:

Explanation:The equation for this is F = -GmM/R^2 where the minus sign says the force is attractive m is 10 kg, M is 20 kg and R is 5 meters. If you crunch the numbers you get an answer of:

7 0
3 years ago
What is the mass in grams of 4.50*10^16 atoms potassium (K)?
ozzi
(4.50x10^16)/(6.02x10^24) = 7.5mols
7.5mols x 39.1= 293.25grams
4 0
3 years ago
Are all Plates on Earth moving at the same speed (rate)? Explain
masya89 [10]

Answer:

the answer is no.

Explanation:

Basically they move at different speeds because they are not all identical in the earth.

4 0
3 years ago
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