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3 years ago

Help Ill give you the brainiest answer thing please just give me the right answer

Chemistry

2 answers:

Rudik [331]3 years ago

6 0

3rd I'm definitely sure

yaroslaw [1]3 years ago

5 0

Answer:

the 3rd one

Explanation:

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Elabore el balance de la ecuación por oxido reducción enumerando cada paso

Rasek [7]

Answer:

${ \rm{5CaC _{2}O _{4(aq)}+ 2KMnO _{4(aq)} + 8H _{2} SO _{4(aq)} → 5CaSO _{4(s)}+ 2Mn SO _{4(aq)}+ K _{2} SO _{4(s)} + 10CO _{2(g)} + 8H _{2} O _{l} }}$

Explanation:

This is a redox reaction formed by combining two half equations.

Check the image above, sorry if my handwriting is poor :(

8 0

2 years ago

Zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas as seen in the chemical equations below:

Sever21 [200]

Answer:

Single Replacement.

Explanation:

8 0

3 years ago

An acid with a p K a of 8.0 is present in a solution with a pH of 6.0. What is the ratio of the protonated to the deprotonated f

olga2289 [7]

Explanation:

According to the Henderson-Hasselbalch equation,

pH = $pK_{a}$ + $\frac{log[A^{-}]}{[HA]}$

Given values are pH = 6, $pK_{a}$ = 8

Putting given values into the above equation as follows.

6 = 8 + $\frac{log [A^{-}]}{[HA]}$

$\frac{log[A^{-}]}{[HA]}$ = -2

$\frac{[A^{-}]}{[HA]}$ = antilog -2

= 0.01

But according to the question, we need protonated to deprotonated ratio of $\frac{[HA]}{[A^{-}]}$

$\frac{[HA]}{[A^{-}]}$ = $\frac{1}{0.01}$

$\frac{[HA]}{[A^{-}]}$ = 100

Thus, we can conclude that ratio of the protonated to the deprotonated form of the acid is $\frac{100}{1}$ .

7 0

3 years ago

The energy needed to destabilize existing chemical bonds and start a chemical reaction is called ____.

postnew [5]

<span>If all chemical reactions that release free energy tend to occur spontaneously,why haven't all such reactions already occurred? One reason is that most reactions require an input of energy to get started.Before it is possible to form new chemical bonds,even bonds that contain less energy,it is first necessary to break the existing bonds,and that takes energy.The extra energy required to destabilize existing chemical bonds and initiate a chemical reaction is called activation energy.</span>

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3 years ago

WILL MARK BRAINLIEST!!

Aneli [31]

A. Molecules made from the covalent bond if 2 atoms of the same type. For example Hydrogen gas always comes in H2.

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3 years ago