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4 years ago

How many moles of oxygen are in 3.0 moles c6h12o6 ? Help!!

2 answers:

3 0

1 mole C₆H₁₂O₆ ------------- 6 moles oxygen
3 moles C₆H₁₂O₆ ----------- X
X = (3×6)/1
X = 18 moles

:)

Alex73 [517]4 years ago

3 0

Answer is: there are 18 moles of oxygen in 3.0 mol of glucose.

n(C₆H₁₂O₆) = 3.0 mol; amount of glucose.

In one molecule of glucose (C₆H₁₂O₆) there are six oxygen atoms:

nn(C₆H₁₂O₆) : n(O) = 1 : 6.

3.0 mol : n(O) = 1 : 6.

n(O) = 3.0 mol · 6.

n(O) = 18.0 mol; amount of oxygen atoms.

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If 0.507J of heat leads to a 0.007 degree C change in water, what mass is present?

Ivanshal [37]

Answer:

17.3 g

Explanation:

Given the following data;

Quantity of heat, Q = 0.507 J
Temperature = 0.007°C
Specific heat capacity of water = 4.2 J/g°C

Mathematically, Heat capacity is given by the formula;

$Q = MCT$

Where;

Q represents the heat capacity or quantity of heat.
M represents the mass of an object.
C represents the specific heat capacity of water.
T represents the temperature.

Making "M" the subject of formula, we have;

$Mass, \ m = \frac {Q}{CT}$

Substituting the values into the formula, we have;

$Mass, \ m = \frac {0.507}{0.007*4.2}$

$Mass, \ m = \frac {0.507}{0.0294}$

Mass, m = 17.3 grams

3 0

3 years ago

For the complete combustion of 47 g of gasoline (octane, C8H18) , the mass of oxygen consumed is

aleksklad [387]

Answer: d) 164.9 g

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$ $\text{Moles of octane}=\frac{47g}{114g/mol}=0.412moles$

The balanced chemical reaction is:

$2C_8H_{18}(l)+25O_2(g)\rightarrow 16CO_2(g)+18H_2O(g)$

According to stoichiometry :

2 moles of $C_8H_{18}$ require = 25 moles of $O_2$

Thus 0.412 moles of $C_8H_{18}$ will require= $\frac{25}{2}\times 0.412=5.15moles$ of $O_2$

Mass of $O_2=moles\times {\text {Molar mass}}=5.15moles\times 32g/mol=164.9g$

Thus 164.9 g of oxygen is consumed.

4 0

3 years ago

When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous E

Greeley [361]

Answer:

Spontaneous

Explanation:

For a spontaneous reaction , the value for the change in free energy or gibbs' free energy is negative .

The change in free energy , i.e. , ΔG , denotes the maximum amount of usable energy released , as going from initial state , i.e. , the reactant towards the final state , i.e. , the product .

And , the sign of the ΔG , determines whether the reaction is Spontaneous or non Spontaneous or at equilibrium ,

i.e. ,

ΔG < 0 , the reaction is Spontaneous

ΔG > 0 , the reaction is non Spontaneous

ΔG = 0 , the reaction is at equilibrium

For ,

ΔG < 0 , that the reaction proceed without any energy input , hence , it is Spontaneous in nature .

6 0

3 years ago

As electrical energy is converted into heat energy, the total amount in the system

Aleks04 [339]

c. remains the same
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As electrical energy is converted into heat energy, the total amount in the system remains the same
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according to law of conservation of energy

3 0

4 years ago

Read 2 more answers

In the reaction of chlorine with calcium, explain which atom is oxidized.

romanna [79]

Answer:

The atom is oxidized is Ca.

Explanation:

The oxidation-reduction reaction contains a reductant and an oxidant (oxidizing agent).

The oxidation process is the process in which electrons are lost and produce positively charged ions.

The reduction process is the process in which electrons is gained and negatively charge ions are produced.

In the reaction of chlorine with calcium:

Ca + Cl₂ → CaCl₂,

Ca loses 2 electrons and is oxidized to Ca²⁺. (Ca → Ca²⁺ + 2e).

Cl is gains 2 electrons in "Cl₂, oxidation state zero" and is reduced to Cl⁻. (Cl₂ + 2e → 2Cl⁻).

5 0

3 years ago