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Elis [28]
3 years ago
11

the empirical formula of a compound is CH3O. What is the molecular formula if the mass is 62.0g/mole?

Chemistry
1 answer:
zalisa [80]3 years ago
5 0
The empirical formula is the simplest number of atoms each can be reduced to. If we want to find the molecular formula, we need to find the right number of atoms of each that will add to the given mass, in this case, 62.0 grams. In this case, we find the individual masses of each element.
Carbon: 12.011 grams

Hydrogen: 1.008 grams * 3 since there are three

Oxygen: 15.999 grams

When we add these, we get a total mass of 31.034 grams. If we multiply it by two, we get the exact mass of the molecule formula, 62.068. Since we multiplied by two, all molecules have to be multiplied by two. That just means we multiply the number of molecules in the compound by two.
Therefore,

Empirical: CH3O

CH3O*2= C2H6O2 = Molecular
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Calculate the solubility of carbon dioxide at 400 kPa.
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The solubility of carbon dioxide at 400 kPa  at room temperature is ;

( B ) 0.61 CO2/L

<u>Given data </u>

pressure of CO₂ = 400 Kpa = 3.95 atm

Kh of CO₂ = 3.3 * 10⁻² mol/L.atm

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Solubility = pressure * Kh value of CO₂

                = 3.95 atm * 3.3 * 10⁻² mol / L.atm

                = 0.13 mol/l  CO₂

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Hence we can conclude that the solubility of CO₂ at 400 kPa is 0.13 mol/l  CO₂.

Learn more about solubility : brainly.com/question/23946616

From the options the closest answer is ( B ) 0.61 CO₂ / L

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2 years ago
A saturated solution of baso4 has a concentration of 0.5mol/l. a 55ml sample is taken by you. what is the mass of baso4 in the s
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Answer:

6.4 g BaSO₄

Explanation:

You have been given the molarity and the volume of the solution. To find the mass of the solution, you need to (1) find the moles BaSO₄ (via the molarity ratio) and then (2) convert moles BaSO₄ to grams BaSO₄ (via the molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 2 sig figs to reflect the sig figs of the given values.

Molarity (mol/L) = moles / volume (L)

(Step 1)

55 mL / 1,000 = 0.055 L

Molarity = moles / volume                             <----- Molarity ratio

0.5 (mol/L) = moles / 0.055 L                        <----- Insert values

0.0275 = moles                                             <----- Multiply both sides by 0.055

(Step 2)

Molar Mass (BaSO₄): 137.33 g/mol + 32.065 g/mol + 4(15.998 g/mol)

Molar Mass (BaSO₄): 233.387 g/mol

0.0275 moles BaSO₄          233.387 g
---------------------------------  x  -------------------  =  6.4 g BaSO₄
                                                1 mole

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