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2 years ago

What is a monoatomic molecule

Chemistry

2 answers:

Degger [83]2 years ago

5 0

Answer:

A molecule composed of just one atom, and lacking any covalent bonds. The noble gases (He, Ne, Ar, Kr, Xe, and Rn) are all monoatomic, whereas most other gases are at least diatomic

Explanation:

Rus_ich [418]2 years ago

4 0

A molecule composed at just one atom

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How many grams of Zn are there in a sample of Zn that contains the same number of moles as a 82.1 gram sample of Ga? grams of Zn

SVEN [57.7K]

Answer:

mass of Zn = 77.0 g

Explanation:

In the sample you have the same moles of Zn and Ga.

The formula for moles is:

$Mass = moles*MM \\$

Where MM: Molar Mass or Atomic Mass for elements

AM(Ga) = 69.723 amu

AM(Zn) = 65.38 amu

moles of Ga = $\frac{Mass}{AM} = \frac{82.1 g}{69.723 amu} = 1.178 mole$

mass of Zn = $moles*AM=1.178 mole*65.38amu = 77.0 g$

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3 years ago

If 8 batteries cost $22 how many does 1 battery cost?

Strike441 [17]

The answer is 2.75 because you divide 22 by 8

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3 years ago

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Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition o

kykrilka [37]

Answer:

With regards to the final composition of the mixture in the vessel at equilibrium, there will be very little amount of the reactants (BrOCl and BrCl), since some amounts of each have been used to form the products (Br2 and OCl).

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2 years ago

When ions having a positive charge form bonds with ions having a negative charge, the charge on the resulting compound is what

Nikitich [7]

zero i think because the compound is both put together... right?

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2 years ago

Calculate the amount in grams of Na2CO3 needed to react with HCL to produce 120g NaCl

worty [1.4K]

Let's start off with the balanced chemical equation:

$Na_2CO_{3_{(s)}} + \textbf2HCl_{_{(aq)}}\rightarrow CO_{2_{(g)}} + H_2O_{_{(l)}} + \textbf2NaCl_{_{(aq)}}$

Assuming the sodium carbonate is the limiting reagent, look at the coefficients of sodium carbonate and sodium chloride and use those as a ratio of sodium carbonate to sodium chloride: 1:2.

Since you have the required mass of NaCl, convert this to moles.

Assuming you know how to find the molar mass of NaCl:

$M_{NaCl} = 58.44g/mol$
$n = \frac{m}{M}$
$n_{NaCl} = \frac{120g}{58.44g/mol}$
$n_{NaCl} = 2.053mol$

Using the ratio, since 1 mole of sodium carbonate is required to produce 2 moles of sodium chloride, cross-multiply the ratios:

$1:2 = x:2.053mol$
$2x = 2.053mol$
$x = 1.027mol$

Therefore 1.027 moles of sodium carbonate is required to produce the required amount of sodium chloride. Convert to mass for your final answer:

$n_{Na_2CO_3} = 1.027mol$
$M_{Na_2CO_3} = 105.99g/mol$
$m = nM$
$m = (1.027mol)(105.99g/mol)$
$m_{Na_2CO_3} = 108.85g$

Hope this helps :)

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2 years ago