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krok68 [10]
3 years ago
12

Which of the following atoms will not react with water​

Chemistry
1 answer:
Sati [7]3 years ago
3 0

Answer:

Among Na ,K , Pb , Li , The atom which does not react with water is :

<u>Pb</u>

Explanation:

Li  : Reacts slowly with water

Na ,K  : Reacts vigorously with water

Pb : It does not reacts with water because :- Pb oxidize in presence of  atmospheric oxygen to form lead oxide (PbO) . this PbO form a layer over the surface of Pb and make it inert to water.

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CaO is the chemical formula for quick lime

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3 years ago
6. The energy of a photon of light is given by E = hc/Where h = Planck's constant (6.626 x 10-34 Jsec), c = the speed of light
11111nata11111 [884]

Answer:The answers are on the attachments.

Explanation:

6 0
3 years ago
Explain the differences between ionic and covalent bonding that account for the differences in their melting points.​
Maurinko [17]

Answer:

El enlace iónico se da entre dos átomos diferentes (metálico y no. metálico), mientras que el enlace covalente se produce entre dos átomos iguales (no-metálicos). En el enlace covalente hay un compartimiento de electrones, mientras que en el enlace iónico hay una transferencia de electrones

Explanation:

5 0
3 years ago
assuming that each human being has 60 trillion body cells in that the earths population is 6 billion calculate the total number
sesenic [268]

3.6 x 10²³

Explanation:

Given parameters:

  Number of cell per body = 60 trillion body cells

   Population of the earth = 6 billion

Unknown:

Total number of living human body cells = ?

Solution:

  To solve this problem, simply find the product:

 Total number of living human body cells = number of cell per body x population of the earth

          1 trillion = 1 x 10¹²

         60 trillion = 6 x 10¹³

         1 billion = 1 x 10⁹

         6 billion = 6 x 10⁹

Total number of living human body cells = 6 x 10¹³ x  6 x 10⁹

                                                                      = 6 x 6 x 10⁽¹³⁺⁹⁾

                                                                       = 36 x 10²² or 3.6 x 10²³

learn more:

Product brainly.com/question/10541435

#learnwithBrainly

7 0
4 years ago
Fluorine-18 is a positron emitter used in pet scans. write a balanced nuclear equation for the reaction.
kow [346]
<span>Due to limitations on typography, I will have to describe the equation instead of actually writing it. Crude appearance. 18 18 0 F --> O + e 9 8 1 Detailed description. Each of the 3 components have both a left superscript and a left subscript which is a superscript and a subscript to the LEFT of the main figure unlike the usual right side that you see subscripts and superscripts. The equation will be F with an 18 left superscript and a 9 left subscript to represent Florine with atomic weight of 18 and 9 protons. Followed by a right arrow to indicate the direction the reaction is going. Followed by the letter O with a left superscript of 18 and a left subscript of 8 to represent Oxygen with atomic weight of 18 and 8 protons. Followed by a plus sign to indicate more. Followed by either the lower case letter "e" or the upper case Greek character beta with a left superscript of 0 and a left subscript of 1 or +1 to represent the positron being emitted with a positive charge and an atomic weight of 0.</span>
5 0
3 years ago
Read 2 more answers
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