CHEMISTRY HIGH SCHOOL

What is the ph of a 0.027 M KOH solution?

Answers

Answer 1
Answer:

The pH of a 0.027 M KOH solution is 12.4 and since KOH is a strong base it will dissociate completely in the solution

How do we calculate?

KOH is a strong base, so it will dissociate completely in solution to form potassium ions and hydroxide ions. The concentration of hydroxide ions will be equal to the concentration of KOH, which is 0.027 M.

The pH of a solution can be calculated using the following equation:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in the solution.

The concentration of hydrogen ions in a basic solution is very low, so we can use the approximation that:

pH = 14 - log[OH-]

pH = 14 - log(0.027)

pH = 12.4

Learn more about hydrogen ions at:

brainly.com/question/13553858

#SPJ6
Answer 2
Answer: First you calculate the concentration of [OH⁻] in solution :

POH  = - log [ OH⁻]

POH = - log [ 0.027 ]

POH = 1.56

PH + POH = 14

PH + 1.56 = 14

PH = 14 - 1.56

PH = 12.44

hope this helps!

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High levels of cholesterol can first lead directly to __________.a. strokes
b. arteriosclerosis
c. heart attacks
d. heart failure

Answers

Answer;

B. arteriosclerosis

High levels of cholesterol can first lead directly to arteriosclerosis.

Explanation;

Atherosclerosis refers to the buildup of fats, cholesterol and other substances in and on your artery walls (plaque), which can restrict blood flow. The plaque can burst, triggering a blood clot.

Arteriosclerosis can occur when arteries grow thick and stiff and restrict blood flow to organs and tissues in the body. This gradual process, also known as hardening of the arteries, weakens arteries and can develop in various organs, most commonly the heart.
    High levels of cholesterol can first lead directly to arteriosclerosis. Hope this helped!

Which of the following elements may occur in the greatest number of different oxidation states?(A) C
(B) F
(C) O
(D) Ca
(E) Na

Answers

a C that is carbon that occur in greatest number of different oxidation zones

The Tacoma narrows bridge collapsed due to?A. Refraction
B. Reflection
C. Diffraction
D. Resonance

Answers

D. Resonance. the bridge was driven at its resonant frequency

How to name alkane using iupac system

Answers

Naming an alkane through the IUPAC system is pretty simple
so all it is is (prefix for number of carbon) + ane
For the first four in this homologous series you have
 Meth- 1 carbon
 Eth- 2 carbons
 Pro- 3 carbons
 But- 4 Carbons
Onward you use the prefixes you know such as Pent, Hex, Hept, Oct, Non, Dec

So for an alkane with 3 Carbons it would be Propane, with 4 - Butane with 8- Octane etc.  

When electrons jump off, They (scientific term)



Will give brainliest

Answers

Answer:

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. This higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon) Electrons therefore have to jump around within the atom as they either gain or lose energy

Explanation:

They gain or lose energy.

A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how many turns are in the secondary? A. 1,653
B. 690
C. 72
D. 8

Answers

There are numerous information's of immense importance already given in the question.
Primary voltage of the transformer (V1) = 115 V
Secondary voltage of the transformer (V2) = 24 V
Number of turns in the primary (T1) = 345
Let us assume the number of turns in the secondary = T2
Then
(V1/V2) = (T1/T2)
(115/24) = 345/T2
115T2 = 345 * 24
115 T2 = 8280
T2 = 8280/115
     = 72
So the correct option among all the options given in the question is option "C".

Answer:

The is 1653

Explanation:

Primary Voltage = # of turns in primary

Secondary Voltage  # of turns in secondary

115 V = 345

24 V     # of turns in secondary

115\25=4.79167

4.79167 = 345

               # of turns in secondary

4.79167 * 345 = 1653.12

When rounded 1653
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