How many atoms of He are in 5.69 grams?

The following reaction occurs in a car’s catalytic converter.

blagie [28]

Answer:The correct answer is ;

The oxidation state of nitrogen in NO changes from +2 to 0, and the oxidation state of carbon in CO changes from +2 to +4 as the reaction proceeds.

Explanation:

$2NO(g)+2CO(g)\rightarrow N_2(g)+2CO_2(g)$

In an oxidation recation addition of oxygen atom takes place or loss of electrons takes place.

In an reduction reaction removal of oxygen atom takes place or gain of electrons takes place.

In the given reaction , the nitrogen atom is present in +2 oxidation state in NO molecule and present in 0 oxidation state in $N_2$ molecule. Hence, nitrogen is getting reduced that is reduction reaction. NO is oxidizing agent

In the given reaction , the carbon atom is present in +2 oxidation state in CO molecule and present in +4 oxidation state in $CO_2$ molecule. Hence ,carbon is getting oxidized that is oxidation reaction. CO is a reducing agent.

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3 years ago

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Two cylinders are made of the same material. Cylinder A is one-fourth (1/4) the length of cylinder B and it has a radius that is

tankabanditka [31]

Answer:

$M_{A}$ : $M_{B}$ = 4 : 1

Explanation:

Given that:

Volume of a cylinder = $\pi$ $r^{2}$ h

For cylinder A, $l_{A}$ = $h_{A}$ = $\frac{1}{4} l_{B}$ and $r_{A}$ = 4 $r_{B}$ .

Volume of cylinder A = $\pi$ $(4r_{B}) ^{2}$ × $\frac{1}{4} l_{B}$

= 4 $\pi$ $r_{B} ^{2}$ $l_{B}$

Volume of cylinder B = $\pi$ $(r_{B}) ^{2}$ $l_{B}$

= $\pi$ $r_{B} ^{2}$ $l_{B}$

To determine the ratio of their masses, density (ρ) is defined as the ratio of the mass (M) of a substance to its volume (V).

i.e ρ = $\frac{M}{V}$

Thus, since the cylinders are made from the same material, they have the same density (ρ). So that;

density of A = density of B

density of A = $\frac{M_{A} }{4\pi r_{B} ^{2}l_{B} }$

density of B = $\frac{M_{B} }{\pi r_{B} ^{2}l_{B} }$

⇒ $\frac{M_{A} }{4\pi r_{B} ^{2}l_{B} }$ = $\frac{M_{B} }{\pi r_{B} ^{2}l_{B} }$

The ratio of mass of cylinder A to that of B is given as;

$\frac{M_{A} }{M_{B} }$ = $\frac{4\pi r_{B} ^{2} l_{B} }{\pi r_{B} ^{2} l_{B} }$

⇒ $\frac{M_{A} }{M_{B} }$ = $\frac{4}{1}$

Therefore, $M_{A}$ : $M_{B}$ = 4 : 1

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3 years ago

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When a chemical change occurs, new what is formed

faltersainse [42]

New m<span>olecules are formed.

If this helped and you have any other questions, feel free to comment on my wall. Hope this helped.
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3 years ago

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How long can a proton-antiproton pair exist without violating the principle of the conservation of mass?

REY [17]

Anti proton are short lived anti-particles of protons that has a charge of -1. When they encounter their counter part, which is the proton, they exist for a short span of time only since they will be annihilated and burst into a form of energy.

4 0

3 years ago

Dichlorine monoxide is polar or nonpolar ?

skelet666 [1.2K]

Answer:

( dichlorine monoxide ) is Polar Explanation:Answer. Answer = CF2Cl2 (Dichlorodifluoromethane) is Polar What is polar and non-polar? Cl2O ( dichlorine monoxide ) is Polar I'll tell you the polar or nonpolar list below.

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3 years ago