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son4ous [18]
2 years ago
15

The atomic number of polassium and

Chemistry
1 answer:
never [62]2 years ago
6 0

Explanation:

Atomic radius decreases from left to right in a period.

Therefore Calcium would have a smaller atomic size.

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1. NaOH mass of a solution of 200g in which its percentage is 25%. What mass of sulfuric acid solution is needed to completely n
Ede4ka [16]

Answer:

m_{H2SO4 = 61.25 g

m_{Na2SO4} = 88.75 g

Explanation:

m_{NaOH} = \frac{200 . 25 }{100} = 50 g

⇒ n_{NaOH} = \frac{50}{40} = 1.25 (moles)

2NaOH + H2SO4 ⇒ Na2SO4 + 2H2O

   2        :     1           :      1         :    2

 1.25                                                       (moles)

⇒  n_{H2SO4} = 1.25 × 1 ÷ 2 = 0.625 (moles) ⇒ m_{H2SO4} = 0.625 × 98 = 61.25 g

    n_{Na2SO4} = 1.25 × 1 ÷ 2 = 0.625 (moles) ⇒m_{Na2SO4} = 0.625 × 142 = 88.75 g

4 0
3 years ago
Which sample of water contains particles having the highest kinetic energy
Ilya [14]

Answer:It got to be C

Explanation: 75ml of water is

3 0
2 years ago
Read 2 more answers
When the pH is high, what is tue concentration of hydrogen ions in a solution
joja [24]
Lowered cos the higher the ph the lower the hydrogen ions
5 0
3 years ago
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Of the following, ________ should have the highest critical temperature. Of the following, ________ should have the highest crit
3241004551 [841]

Answer:

H2

Explanation:

Critical temperature is the temperature above which gas cannot be liquefied, regardless of the pressure applied.

Critical temperature directly depends on the force of attraction between atoms, it means stronger the force of higher will be the critical temperature. So, from the given options H2 should have the highest critical temperature because of high attractive forces due to H bonding.

Hence, the correct option is H2.

5 0
2 years ago
A scientific experiment must be
Blababa [14]
Repeatable

If it’s repeatable and you get the same answer constantly then it’s a good and accurate experiment
6 0
3 years ago
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