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3 years ago

Please answer!! I WILL GIVE EXTRA POINTS AND BRAINLIEST

Chemistry

2 answers:

sveta [45]3 years ago

5 0

The answer is D I believe

Marizza181 [45]3 years ago

5 0

I think it’s a man (it’s showing Me error so I have to write more) sodmdsjismsssnssmsnssk

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What is the [OH-] if the [H3O+] is 1 x 10 -6?

Mariulka [41]

The answer is [OH⁻] = 1 x 10⁻⁸.

To find OH⁻, divide the ionic product of water by [H₃O⁺] as :

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[OH⁻] = 1 x 10⁻¹⁴ / 1 x 10⁻⁶
[OH⁻] = 1 x 10⁻⁸

5 0

2 years ago

Mg + 2H20 + Mg(OH)2 + H2 + 353kJ

mixer [17]

Answer:

$m_{H_2O}=8.9g$

Explanation:

Hello,

Based on the given reaction, since magnesium and water are in a 1:2 molar ratio at the reactants, we must apply the following stoichiometric factors to compute the complete reaction of the 6.0 g of magnesium:

$m_{H_2O}=6.0gMg*\frac{1molMg}{24.305 gMg}*\frac{2molH_2O}{1molMg} *\frac{18gH_2O}{1molH_2O} \\\\m_{H_2O}=8.9g$

Best regards.

7 0

3 years ago

All of the following contribute to the large, negative, free-energy change upon hydrolysis of "high-energy" compounds except: a.

klasskru [66]

Answer:

C) low activation energy of forward reaction

Explanation:

Activation energy for the forward reaction is the quantity of free energy which is needed for a reaction to move from the reactant phase of energy level to the transition state of energy level. The higher the rate of energy level, the slower the chemical reaction.

Activation energy is a barrier that must be overcome for a reaction to take place.

8 0

3 years ago

What would the pOH of a solution be if the pH is 9.4

Alika [10]

<h2>Answer:</h2>

pOH = 4.6

<h2>Explanations:</h2>

The sum of pH and pOH of a solution is 14as shown:

$pH+pOH=14$

Given the following parameter

pH = 9.4

Substitute the given parameters into the formula to have:

$\begin{gathered} 9.4+pOH=14 \\ pOH=14-9.4 \\ pOH=4.6 \end{gathered}$

Hence the pOH of the solution of pH of 9.4 is 4.6

4 0

1 year ago

1. Calculate the average atomic mass of iron if its abundance in nature is 15%-iron-55 and

blsea [12.9K]

The average atomic mass of iron : 55.85 amu

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.

An atomic mass unit = amu is a r<em>elative atomic mass of 1/12 the mass of an atom of carbon-12. </em>

The 'amu' unit has now been replaced with a unit of 'u' only

Atomic mass is the average atomic mass of all its isotopes

atomic mass X = mass isotope 1 . % + mass isotope 2.% ...

The average atomic mass of iron

$\tt =0.15\times 55+0.85\times 56\\\\=\boxed{\bold{55.85~amu}}$

8 0

3 years ago