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Sidana [21]
3 years ago
14

Hydrogen is an element. True False

Chemistry
2 answers:
padilas [110]3 years ago
7 0

Answer:

True

Explanation:

Hydrogen is one of the most abundant elements in the universe so yes

mixas84 [53]3 years ago
7 0

Answer:

true

Explanation:

Hydrogen is an chemical element

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A chemical reaction occurs between Calcium, Oxygen, and Chlorine. The reaction is demonstrated:
ad-work [718]

Answer:

D.

Double replacement, CaO + Cl2O

Explanation:

8 0
3 years ago
Read 2 more answers
CO2+2H2O=H3O^++HCO3^-
bekas [8.4K]

<u>Answer:</u>

<em>Bronsted Lowry Theory</em>

<em>CO_2 is the acid </em>

<em>H_2 O is the base </em>

<em>H_3 O^+ is the conjugate acid and </em>

<em>HCO_3^- is the conjugate base</em>

<u>Explanation:</u>

Bronsted Lowry Theory:

An acid is a substance that can donate one or more protons

A base is a substance which can accept one or more protons

Hydrogen atom which is neutral (No Charge) contains 1 positive proton, 1 negative electron and 0 neutral neutron.  

Thus Hydrogen atom has no Charge and it is neutral.

When an hydrogen atom loses an electron, Hydrogen ion is formed, which will contain 1 positive proton and 0 negative electron and 0 neutral neutron.

Thus Hydrogen ion has a positive charge.  

Hydrogen ion is also called as a proton since it has only 1 proton in it.

Hydrogen ion in water that is,  

H^++H_2O\Rightarrow H_3O^+

H_3O^+ is called as Hydronium ion.

Acid loses H+ (proton) to form conjugate Base

Base gains H+ (proton) to form conjugate Acid

For example  

Let us consider the example given in the question

CO_2+2H_2 O>H_3 O^+   +HCO_3^- can be written as (removed 1 H_2 O from both the sides )

CO_2+H_2 O>H^++HCO_3^- or  

CO_2+H_2 O  > H_2 CO_3 reversing the equation  

H_2 CO_3+H_2 O>H_3 O^+  +HCO_3^-

H_2 CO_3 is the acid which donates H^+ to form HCO_3^-

H_2 O is the base which gains H^+ to form H_3 O^+

HCO_3^- is the conjugate base and H_3 O^+ is the conjugate acid

So

CO_2 is the acid

H_2 O is the base

H_3 O^+ is the conjugate acid and

HCO_3^- is the conjugate base

(Answer)  

5 0
3 years ago
What is physical weathering NOT caused by? (pls i really need help with this!!)
Anarel [89]

Answer:

the changing tempure in rocks causing it to back apart

3 0
2 years ago
I need to know the weighted average please!
maria [59]

Answer:

63.5456 amu

Explanation:

0.6917*62.9296+0.3083*64.9278= 63.5456\ amu

8 0
3 years ago
When does phenolphthalein turn pink?
Setler79 [48]
Phenolphthalein turn pink in basic solutions.it turn colourless in acid solution.
Hence options(1)is correct
3 0
3 years ago
Read 2 more answers
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