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3 years ago

Which Group is in the second column of the periodic table?

Chemistry

2 answers:

Vadim26 [7]3 years ago

4 0

Answer: alkaline earth metals

Explanation:

Misha Larkins [42]3 years ago

3 0

Answer:

Hey there!

That would be the alkaline earth metals.

Hope this helps :)

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How many moles are in 25.58 grams of H20? SHOW WORK

kirill115 [55]

Answer:

1.42 moles

Explanation:

25.58 g of H₂O .

Molecular weight of water = 2 x 1 + 16 = 18

1 mole of water = 18 g of water

18 g of water = 1 mole

25.58 g of water = 25.58 / 18 mole

= 1.42 moles .

7 0

3 years ago

Calculate the concentration of the rubidium hydroxide solution in g dm³. (relative atomic mass: Rb = 85; relative formula mass:

Fofino [41]

Answer:

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Explanation:

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-1

Given that 0 find the value of a and the value of b.

(2 marks)

5 0

2 years ago

Draw the lewis structure for the polyatomic trisulfide s−23 anion. be sure to include all resonance structures that satisfy the

mezya [45]

The following are the steps involved in drawing Lewis structure of the polyatomic trisulfide anion $S_{3}^{2-}$ :

Total number of valence electrons = $(3 * 6) + 2 = 20 electrons$

Resonance is not possible in this ion. The molecular geometry of the ion will be bent as there are two lone pairs and two bond pairs on the central atom.

3 0

3 years ago

Arrange these molecules in order of decreasing mass: C6H14 , NO2 , Fe2O3 , and CaCO

babunello [35]

The following is the arrangement of the given molecules in decreasing order of mass: $\text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}$

Solution:

First inorder to arrange the elements in descending order of their mass we have to calculate the molecular mass of each element. The calculation is as follows:

Mass of C6H14:

$C\rightarrow6\times12.01 = 72.06$