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s2008m [1.1K]
3 years ago
15

Which formula is an empirical formula?

Chemistry
2 answers:
Naily [24]3 years ago
6 0
CH4 as empirical formula is the simplest ratio of all the atoms in a molecule
Irina18 [472]3 years ago
5 0

<u>Answer:</u> The empirical formula is CH_{4}

<u>Explanation:</u>

Empirical formula is defined as the formula in which atoms in a compound are present in simplest whole number ratios.

For the given options:

<u>Option A:</u>  C_4H_{10}

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be C_2H_5

<u>Option B:</u>  C_3H_{6}

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be CH_2

<u>Option C:</u>  CH_{4}

As, the atoms are in the smallest whole number ratio, it is the empirical formula.

<u>Option D:</u>  C_2H_{6}

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be CH_3

Hence, the empirical formula is CH_{4}

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A conductor transmits heat and electrical good. 
8 0
2 years ago
Limiting reactants would appreciate the help
Vanyuwa [196]

Answer:

Explanation:

The Limiting Reactant is that reactant which when consumed in a reaction stops the reaction. The other reactants will be in excess and typically considered non-reactive.

To identify the limiting reactant ...

- write and balance the reaction of interest. Express it in standard form. That is, standard form of a reaction is when the coefficients of the balanced equation are in their lowest whole number values. Also, remember that the standard equation is 'assumed' to be at STP conditions (0°C & 1atm).

- convert all given reactant values to moles

- divide each reactant mole value by the related coefficient of the the balanced standard equation. The smaller value is the limiting reactant. The remaining reactants will be in excess.  

Your Problem:

Given:        3Ba  +  N₂  => Ba₃N₂

               22.6g    4.2g        ?

moles Ba => 22.6g/137.34g/mol = 0.165 mole Ba

moles N₂ =>    4.2g/14.007g/mol= 0.150 mole N₂

Part A: Determining the Limited Reactant

  • Divide each mole value by respective coefficient ... smallest value is Limiting  Reactant.

Barium => 0.165/3 = 0.055  <=> (Limiting Reactant)

Nitrogen => 0.15/1 = 0.15

  • Barium is the smaller result and is therefore the limiting reactant. This works for ALL limiting reactant type problems. However, be sure to use the mole values calculated first (Ba = 0.165mol & N₂ = 0.150mol) when doing ratio calculations.

Part B: Max (theoretical) amount of Ba₃N₂ produced:

<em>Note: The product yield amounts are based upon the given 'moles' of limiting reactant, NOT the results of the 'divide by respective coefficient' step used to ID the limiting reactant.     </em>

                   3Ba        +          N₂         =>     Ba₃N₂    (3:1 rxn ratio for Ba:Ba₃N₂)

moles      0.165mole        0.150mole         1/3(0.165)mole = 0.055mole Ba₃N₂

                                                                    = 0.055mol(440g/mol) Ba₃N₂

                                                                    = 24.2 grams Ba₃N₂ (as based

                                                                     upon Barium as Limiting Reactant)

Part C: Excess N₂ remaining after reaction stops:

From balanced standard reaction, the reaction ratio for Ba:N₂ is 3moles:1mole. That is, for the moles of Ba consumed, 1/3(moles of Ba) =  moles of N₂ used.

moles of N₂ used = 1/3(0.165)mole = 0.055mole N₂ used  

∴ the amount of N₂ remaining in excess = 0.150mole (given) - 0.055mole (used) = 0.095mole N₂ remaining in excess.

mass N₂ remaining = 0.095mole x 28g/mole = 2.66 grams N₂ remaining in excess.

                   

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Answer:

A Cellulose not digested by humans.

b. the storage form of carbohydrates in plants is starch

C amylose contains 1-4 glycosidic bond

D Glycogen and starch are highly branched polysaccharides.

Explanation:

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Explanation:

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Read 2 more answers
Are these answers correct? I’m a little unsure
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Answer:

yes I think that they are correct

8 0
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