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stira [4]
2 years ago
13

Which of the following reactions shows a chemical change producing a gas?

Chemistry
1 answer:
Lisa [10]2 years ago
7 0

Answer:

00000000000000000000000000000009

Explanation:

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A 96.0 ml volume of 0.25 m hbr is titrated with 0.50 m koh. calculate the ph after addition of 48.0 ml of koh at 25 ∘c.
PilotLPTM [1.2K]
KOH is a strong base and HBr is a strong acid and completely dissociates.
The balanced equation for the reaction is;
KOH + HBr ---> KBr + H₂O
Stoichiometry of acid to base is 1:1
The number of KOH moles reacted - 0.50 M / 1000 mL/L x 48.0 mL = 0.024 mol
number of HBr moles reacted - 0.25 M/ 1000 mL/L x 96.0 mL  = 0.024 mol
the number of H⁺ ions are equal to number of OH⁻ ions. 
Then the solution is neutral.
pH of neutral solutions at 25 °C is 7. 
Therefore pH is 7
8 0
3 years ago
which of the following chemical symbol is that of an element with six electrons in the outermost shell a)Ca b)Cl c)Ne d)S​
nydimaria [60]
Hey there!

Sulphur is the element which has 6 electrons in the outermost shell.

WhereasCalcium,Neon have 2 and chlorine has 7.

Hope this explanation helps you :)
Have a good day :)
5 0
1 year ago
Read 2 more answers
MAGNESIUM (Mg)<br> +FLUORINE (F) =
bazaltina [42]

Answer:

MgF2 magnesium fluoride

4 0
3 years ago
How does stem apply to science?<br><br> (i swear if yall just answer for points ima lose it)
vova2212 [387]

STEM is an acronym meaning

Science

Technology

Engineering

Mathematics

One of the main focuses of STEM courses is on science, so you will be learning about various types of science

This is an approach at learning to have students learn all four types of subjects in one class, based on real world applications.

8 0
3 years ago
Please help me ASAP
MrRissso [65]

Answer:

<h2><em>an</em><em>swer</em><em> will</em><em> be</em><em> </em><em>D</em></h2>

<em>change</em><em> </em><em>of</em><em> </em><em>sta</em><em>te</em><em> </em><em>only</em><em> </em>

8 0
3 years ago
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