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Natali5045456 [20]
3 years ago
11

How many hydrogen atoms are needed to form five water molecules

Chemistry
2 answers:
BARSIC [14]3 years ago
8 0
2 Hydrogen Atoms Are Needed To Form Five Water Molecules
N76 [4]3 years ago
8 0
30 are needed to form five water molecules
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Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (Rb) strontium (Sr) zirconium (Zr)
vladimir1956 [14]
<h3>Answer:</h3>

           Strontium (Sr)

<h3>Explanation:</h3>

                        The condition given in statement is the presence of two valence electron. Hence, first we found the electronic configuration of given atoms as follow;

                       Rubidium                         [Kr] 5s¹

                      Strontium                        [Kr] 5s²

                       Zirconium                         [Kr] 4d² 5s²

                      Silver                                 [Kr] 4d¹⁰ 5s¹

From above configurations it is cleared that only Strontium and Zirconium has two electrons in its valence shell.

We also know that s-block elements are more reactive than transition elements due to less shielding effect in transition elements hence, making it difficult for transition metals to loose electrons as compared to s-block elements. Therefore, we can conclude that Strontium present in s-block with two valence electrons is the correct answer.

4 0
3 years ago
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Gallionella bacteria can get energy from the reaction fe2+ → fe3+. This reaction is an example of
djverab [1.8K]

The gallionella bacteria  reaction

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Explanation

oxidation reaction reaction occurs when electrons are lost during reaction by a molecule or ion or atom. when oxidation occurs  the oxidation state of the molecule or ion or atom increases. For this reason Fe2+ → Fe3+ is a oxidation reaction since the oxidation state move from oxidation state 2 to 3


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3 years ago
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Setler79 [48]

Answer:C The final product cannot be converted back to the original ingredients.

7 0
3 years ago
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Help me for number 5 and 6 quickly
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Idk I think its a major addation Or Reading Or Socail Studies Sorry tho

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The structure of cyclopentane-1,2-diol​
Lady bird [3.3K]

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An hydroxyl group (-OH) is attached. Molecular formula is

C5H8(OH)2

Explanation:

6 0
2 years ago
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