3 years ago

Calculate the average atomic mass for element X

1 answer:

mina [271]3 years ago

5 0

Answer:

51.6058

Explanation:

The percentage of abundance is changed to decimal by dividing 100

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HACTEHA [7]

Answer:

Ba(OH)2 + H2SO4 ------> BaSO4 + 2H2O

1) Moles of Ba(OH)2 = moles of H2SO4 = 0.025L x 2)0.02M = 5.0 x 10^-4M

Concn of Ba(OH)2 in g/L = 5.0 x 10^-4M x 171.33g/mol = 0.086g/mol

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Crazy boy [7]

1 mole of an alkane gives 2 moles is correct answer

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Tom [10]

Molality is a measure of concentration that relates the moles of solute to the kilograms of solvent, it is described by the following equation:

$Molality=\frac{molSolute}{kgSolvent}$

We are given the molality(2.50m) and kilograms of solvent(0.500kg), so we solve for moles of solute from the equation:

$molSolute=Molality\times kgSolvent$ $\begin{gathered} molSolute=2.50m\times0.500kg \\ molSolute=1.25molSolute \end{gathered}$

To make a 2.50molal NaOH solution would be needed 1.25moles of solute

Answer: 1.25 moles

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Archy [21]

X will be hydronium (H3O)

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3 years ago

LenaWriter [7]

Answer:

Choice 1. "HI to increase".

Explanation:

I found out the hard way.

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