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3 years ago

Given the reaction 2CO + O2 = 2CO2, what is the minimum number if moles of O2 required to produce one mole of CO2?

Chemistry

2 answers:

Aliun [14]3 years ago

8 0

Answer:

0.5 moles of O₂

Explanation:

See the stoichiometry of the reaction:

2CO + O₂ → 2CO₂

2 moles of carbon monoxide need 1 mol of oxygen to react in order to produce 2 moles of carbon dioxide.

If I want to produce 1 mol of CO₂, I just need the half of O₂.

You will see in this rule of three. Ratio is 2:1

2 moles of CO₂ are produced by 1 mol of O₂ (Stoichiometry - reaction)

1 mol of CO₂ will be produced by ( 1 . 1) / 2 = 0.5 moles

Bingel [31]3 years ago

7 0

Answer:

two moles

A mole of CO2 molecules (we usually just say “a mole of CO2”) has one mole of carbon atoms and two moles of oxygen atoms.

Explanation:

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Hydrazine, N2H4, is a colorless, oily liquid that fumes in air and has an odor much like that of ammonia. It is used as a rocket

Cloud [144]

Answer:

1 unshared pair of electrons

Explanation:

In order to draw the Lewis structure, we need to consider the octet rule: atoms tend to share electrons to complete their valence shell with 8 electrons. In the case of H, it has to complete a duet (2 valence electrons).

N has 5 valence electrons, so it has to share 3 pairs of electrons to reach the octet.

H has 1 valence electron, so it has to share 1 pair of electrons to reach the duet.

In the picture, we can see the resulting Lewis structure. There is 1 unshared pair of electrons on each nitrogen.

6 0

3 years ago

Before the use of technetium-99m, patients with high risk coronary artery disease were evaluated using thallium-201 which has a

agasfer [191]

Answer: 243 hours

Explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = initial amount of the reactant = $5.000\mu g$

a - x = amount left after decay process = $\frac{10}{100}\times 5.000\mu g=0.5\mu g$

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$k=\frac{0.693}{73.00hours}=9.49\times 10^{-3}hours^{-1}$

b) for reducing the mass to 10.00 % of its original mass

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

$t=\frac{2.303}{9.49\times 10^{-3}}\log\frac{5.000}{0.5}$

$t=243hours$

The time taken to reach 10.00 % of its original mass is 243 hours

3 0

3 years ago

What month and what year did Matthias Schleiden contribute to the cell theory.

Brums [2.3K]

Answer:

Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.

Explanation:

4 0

3 years ago

cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the surroundings is l

brilliants [131]

Answer:

The system gains 126100 J

Explanation:

The heat can be calculated by the equation:

Q = nxCxΔT, where Q is the heat, C is the heat capacity,n is the number of moles and ΔT is the variation of temperature (final - initial). The number of moles is the mass divided by the molar mass, so:

n = 250/4 = 62.5 mol.

The system must be in thermal equilibrium with the surroundings, so if the temperature of the surroundings decreased 97 K, the temperature of the system increased by 97 K, so ΔT = 97 K

Q = 62.5x20.8x97

Q = 126100 J

6 0

4 years ago

Nuclear energy is released during

Zepler [3.9K]

fusion and fission

Explanation:

the nuclear energy is released by fusion when the nuclei of two atoms are combined while the fission is process when the nucei of two atoms split apart

3 0

4 years ago