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poizon [28]
3 years ago
16

Helpppppppppppppppppppppp

Chemistry
1 answer:
Jet001 [13]3 years ago
6 0

Explanation:

Atoms of the same element that differ in their numbers of neutrons are called isotopes. ... Different isotopes of an element generally have the same physical and chemical properties because they have the same numbers of protons and electrons.

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Balance the equation: Ca + ....... H2O->Ca(OH)2 + H2
Mnenie [13.5K]
\large\boxed{{Ca+ \bold{2}H_2O \to Ca(OH)_2+H_{2}}}
7 0
4 years ago
A 28. 0 ml sample of vinegar, which is an aqueous solution of acetic acid, ch3cooh, requires 21. 5 ml of 0. 550 m naoh to reach
Fittoniya [83]

Concentration of vinegar sample of 28mL which requires 21. 5 ml of 0.550 M NaOH to reach the endpoint in a titration is 0.42M.

<h3>How do we calculate the concentration of Vinegar?</h3>

Concentration of vinegar in the titration method will be used by using the below equation:

M₁V₁ = M₂V₂,

  • M₁ & V₁ are the molarity and volume of acetic acid.
  • M₂ & V₂ are the molarity and volume of vinegar sample.

By putting values on above equation from the question, we get

M₂ = (0.55M)(21.5mL) / (28mL) = 0.42 M

Hence, required concentration of vinegar is 0.42M.

To know more about concentration, visit the below link:

brainly.com/question/14469428

#SPJ4

6 0
2 years ago
Is it true a single covalent bond involves two atoms sharing one pair of electrons
Dima020 [189]

Answer:

Yes

Explanation:

A single covalent bond forms when two atoms share one pair of electrons.

Covalent bonds are formed between two or more atoms having zero or very small electronegativity difference. Such bonds exists between molecules of non-metals.

  • To form a covalent bond, each of the two participating atoms would put down an unpaired electron.
  • The unpaired electrons form a shared pair of electrons between them.
  • This shared pair of electrons constitutes the electron cloud that binds the two atoms together.
  • The shared pair of electron is the covalent bond.  
5 0
3 years ago
What are the 3 types of chemical reactions?
den301095 [7]

Answer:

Synthesis reactions. Decomposition reactions. Combustion reactions.

Explanation:

Synthesis reactions. - Two or more reactants combine to make 1 new product

Decomposition reactions. - A single reactant breaks down to form 2 or more products.

Combustion reactions. - A single element or compound combines with oxygen gas releasing energy. This rapid oxidation is called burning.

4 0
3 years ago
Which of the following acts as a bronstesLowry acid but not as a bronsted lowry base
fredd [130]
D. HCIO4(AQ) 

Hope this helps...
7 0
3 years ago
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