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777dan777 [17]
3 years ago
6

Which of the following do you think use plasma? welding rocket engines computer chips surgery chemical analysis ozone generation

Chemistry
2 answers:
cricket20 [7]3 years ago
6 0

Welding and computer chips

timofeeve [1]3 years ago
4 0
<h3><u>Answer</u>;</h3>

Rocket engines

<h3><u>Explanation</u>;</h3>
  • <em><u>Plasma is a hot, dense ionized state similar to that inside a fusion reactor or star.</u></em>
  • Some type of rocket engine uses electrical source to transform hydrogen gas into plasma.
  • Then powerful magnets force the plasma out of the engine to propel the rocket at very high speeds of about 123,000 mph.
  • <em><u>Instead of fuel, plasma jet engines use electricity to generate electromagnetic fields. These compress and excite a gas, such as air or argon or hydrogen, into a plasma.</u></em>
You might be interested in
Write reaction equations to explain how your acetic acid-acetate buffer reacts with an acid and reacts with a base.
guajiro [1.7K]

acetic acid = CH3COOH(aq) , acetate = CH3COO-(aq) and proton = H+(aq)

so...

CH3COOH(aq) <-> CH3COO-(aq) + H+(aq)

this is the dissociation of acid, therefore, it will yield H+ ions in solution, which are ACIDIC

then... for the acetate buffer, recall that

CH3COO-(aq) is a weak conjugate base, so, it can accept H+ if in excess

so

H+(aq) + CH3COO-(aq) <--> CH3COOH(aq)

therefore, addition of excess H+, will form CH3COOH slowly.. i.e. th epH will not increase drstically

Addition of OH- ins, from a strong base:

OH-(aq) + H+(aq) <--> H2O(l)

then, OH- is apdily converted to H2O, which is not basic, so pH won't change drastically.

6 0
4 years ago
Chromic acid (H2CrO4) is an acid that is used in ceramic glazes and colored glass. The pH of a 0.078 M solution of chromic acid
cestrela7 [59]

Answer:

Ka = 0.1815

Explanation:

Chromic acid

pH = ?

Concentration = 0.078 M

Ka = ?

HCl

conc. = 0.059M

pH = -log(H+)

pH = -log(0.059) = 1.23

pH of chromic acid = 1.23

Step 1 - Set up Initial, Change, Equilibrium table;

H2CrO4 ⇄  H+   +   HCrO4−

Initial - 0.078M 0   0

Change : -x    +x       +x

Equilibrium : 0.078-x    x      x

Step 2- Write Ka as Ratio of Conjugate Base to Acid

The dissociation constant Ka is [H+] [HCrO4−] / [H2CrO4].

Step 3 - Plug in Values from the Table

Ka = x * x / 0.078-x

Step 4 - Note that x is Related to pH and Calculate Ka

[H+] = 10^-pH.

Since x = [H+] and you know the pH of the solution,

you can write x = 10^-1.23.

It is now possible to find a numerical value for Ka.

Ka =  (10^-1.23))^2 / (0.078 - 10^-1.23) = 0.00347 / 0.0191156

Ka = 0.1815

4 0
3 years ago
Match each scientist with thr contribution he made to the arrangement of the elements in the periodic table​
Bas_tet [7]

Answer:

Dmitri Mendeleev

used patterns to predict undiscovered

elements

Johann Wolfgang Dobereiner

created groups of three elements,

each based on similar properties

John Newlands

arranged elements according to their

atomic mass

Antoine Lavoisier,

divided elements into four categories

✓

5 0
3 years ago
The concentration of H30 in your swimming pool is 4 x 10^-5 M. What is the pH of your pool? O a.-4.4 Ob.4.4 Oc. 0.00004 O d.-0.6
mariarad [96]

Answer:

b. 4.4

Explanation:

pH is related to the concentration of H₃O⁺ through the following equation:

pH = -log([H₃O⁺]) = -log(4 x 10⁻⁵)

pH = 4.4

8 0
4 years ago
the use of logic making empirical observations and preforming dissections were all part of the scientific studies by
olga55 [171]

The answer is: Aristotle.

Aristotle (384–322 BC) was an ancient Greek philosopher.

He was interested in empirical studies and shifted from Platonism to empiricism.

Empiricism is a theory that states that knowledge comes from sensory experience and through experiments.

Empirical evidence is the information received by observation through experimentation.

3 0
3 years ago
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