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3 years ago

In the reaction of Mg (s) + 2 HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), what

Chemistry

2 answers:

Bond [772]3 years ago

7 0

Answer: Decrease in concentration of reactant

Explanation:

For a typical reaction of an acid with a metal, decrease in concentration of reactant (acid) would lead to decrease in formation of salt or hydrogen. Increase in the concentration would lead to increase in the formation of products.

Temperature and pressure also have little effect here since the reaction is spontaneous in nature

Pavlova-9 [17]3 years ago

4 0

To decrease the rate of the forward reaction you can do the following:

- decrease the concentration of the reactants

- increase the concentration of the products

- increase the pressure so the hydrogen gas will not be easily removed from the reaction

- decrease the temperature, number of collisions will decrease so the rate of the reaction will decrease

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How does wavelength affect the pitch of a sound?

boyakko [2]

Answer:

Explanation:

because the higher the wavelength the shorter the pitch and the shorter the wavelength the higher the pitch

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3 years ago

Both artists and scientists contribute to our understanding of the world around us. Identify the ways that

LUCKY_DIMON [66]

Answer:

I deeply believe that it would be options 1, 2, and 4? Sorry if i'm wrong and good luck!

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3 years ago

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an element has an isotope with a mass of 203.973 amu and and abundance of 1.40%. another isotope has a mass of 205.9745 amu with

ryzh [129]

Answer is: the average atomic mass 217.606 amu.

Ar₁= 203.973 amu; the average atomic mass of isotope.

Ar₂ = 205.9745 amu.

Ar₃ = 206.9745 amu.

Ar₄ = 207.9766 amu.

ω₁ = 1.40% = 0.014; mass percentage of isotope.

ω₂ = 24.10% = 0.241.

ω₃ = 22.10% = 0.221.

ω₄ = 57.40% = 0.574.

Ar = Ar₁ · ω₁+ Ar₂ · ω₂ + Ar₃ · ω₃ + Ar₄ · ω₄.

Ar = 203.973 amu · 0.014 + 205.9745 amu · 0.241 + 206.9745 amu · 0.221 + 207.9766 amu · 0.574.

Ar = 2.855 amu + 49.632 amu + 45.741 amu + 119.378 amu.

Ar = 217.606 amu.

But abundance of isotopes is greater than 100%.

It should be lead, with the fourth isotope weighs 207.9766 amu and an abundance of 52.40.

7 0

3 years ago

The only positive ion found in H2SO4(aq) is the

Hitman42 [59]

The answer is ammonium iron

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4 years ago

What is the pH of 0.000134 M solution of HCI?

mafiozo [28]

Answer: The pH will be 3.87

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

$pH=-\log [H^+]$

$HCl\rightarrow H^++Cl^{-}$

According to stoichiometry,

1 mole of $HCl$ gives 1 mole of $H^+$

Thus $0.000134$ moles of $HCl$ gives = $\frac{1}{1}\times 0.000134=0.0001342$ moles of $H^+$

Putting in the values:

$pH=-\log[0.000134]$

$pH=3.87$

Thus the pH will be 3.87

5 0

3 years ago

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