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3 years ago

If a sample of butene (C4H8) that has a mass of 259.9 g is combusted in excess oxygen, what is the mass of CO2 that is produced?

1 answer:

6 0

The balanced chemical reaction is expressed as:

<span>C4H8 + 6 O2 ⟶ 4 CO2 + 4 H2O
</span>
To determine the mass of carbon dioxide that is produced from the reaction, we use the initial amount of the limiting reactant which is butene in this case. Also, from the relation of the substances in the reaction we can relate CO2 and the amount of the reactant. We calculate as follows:

moles C4H8 = 259.9 g C4H8 ( 1 mol C4H8 / 56.12 g C4H8 ) = 4.63 mol C4H8
moles CO2 = 4.63 mol C4H8 ( 4 mol CO2 / 1 mol C4H8 ) = 18.52 mol CO2
mass CO2 = 18.52 mol CO2 ( 44.01 g / 1 mol ) = 815.27 g CO2 produced

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A flask contains a gas mixture of hydrogen, nitrogen and methane. The total pressure of the mix is 3.0 atm. The partial pressure

ollegr [7]

Answer:

$P_{N_2}=1.0atm$

Explanation:

Hello,

Considering the Dalton's law which states that the total pressure of a gaseous system is defined by the summation of the the partial pressures of the present gases:

$P_T=\Sigma P_i$

For the given system:

$P_T=P_{H_2}+P_{N_2}+P_{CH_4}$

Solving for the partial pressure of nitrogen we obtain:

$P_{N_2}=3.0atm-0.5atm-1.5atm=1.0atm$

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3 0

3 years ago

Which statement best compares potential and kinetic energy?

VMariaS [17]

Answer:

nombres uno

number 1

Explanation:

it is what it is according to physicodeferigolical

4 0

3 years ago

John and Alex were asked to make a 0.70 M solution. John measure out .35 L from the 2.0 M solution before asking how much soluti

nasty-shy [4]

Answer:

1.0 L

Explanation:

Given data

Initial volume (V₁): 0.35 L

Initial concentration (C₁): 2.0 M

Final volume (V₂): ?

Final concentration (C₂): 0.70 M

John and Alex prepared a diluted solution from a concentrated one. We can find the volume of the diluted solution using the dilution rule.

C₁ × V₁ = C₂ × V₂

V₂ = C₁ × V₁ / C₂

V₂ = 2.0 M × 0.35 L / 0.70 M

V₂ = 1.0 L

3 0

3 years ago

Mars2501 [29]

Explanation:

area of rectangle=l×b

15=5×b
b=3cm

2.area of rectangle=l×b

28=l×4
l=7cm

3. perimeter of square=4×L

24=4×L
L=6cm

4. perimeter of rectangle=2(L+b)

14=2(4+b)
14=8+2b
2b=6
b=3cm

hope it helps.

4 0

3 years ago

Read 2 more answers

The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?

Angelina_Jolie [31]

Answer:

Redox type

Explanation:

The reaction is:

2Cr + 3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃

2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.

If we see oxidation state, we see that chromium changes from 0 to +3

Iron changed the oxidation state from +2 to 0

Remember that elements at ground state has 0, as oxidation state.

Iron is being reduced while chromium is oxidized. Then, the half reactions are:

Fe²⁺ + 2e⁻ ⇄ Fe (Reduction)

Cr ⇄ Cr³⁺ + 3e⁻ (Oxidation)

When an element is being reduced, while another is being oxidized, we are in prescence of a redox reaction.

8 0

3 years ago