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KonstantinChe [14]
3 years ago
14

Breathing equipment used by rescue workers needs to capture the CO2 the humans breath out and produce O2 for them to breath in,

like a plant during photosynthesis. One compound capable of doing this is potassium superoxide (KO2), which produces the salt by-product potassium carbonate. What is the balanced chemical equation for this reaction? Don't include states of matter.
Chemistry
1 answer:
const2013 [10]3 years ago
8 0

Answer: 4KO_2+2CO_2\rightarrow 2K_2CO_3+3O_2

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for reaction of potassium superoxide  with carbon dioxide to produce oxygen and potassium carbonate will be:

4KO_2+2CO_2\rightarrow 2K_2CO_3+3O_2

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Which of these is a chemical property of a substance?
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<span>the answer d. </span>flammability
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4 years ago
A chloride of silicon contains 79.1 mass % Cl. (a) What is the empirical formula of the chloride? (b) If the molar mass is 269 g
V125BC [204]

Answer:

Empirical SiCl3

Molecular Si2Cl6

Explanation:

Since it contains 79.1% chlorine, this means it contains (100 - 79.1)% silicon = 20.9% chlorine

To get the empirical formula, we firstly need to know the atomic masses of both chlorine and silicon. This is 35.5 and 28

We then divide the percentage abundances by the corresponding atomic masses.

Cl = 79.1/35.5 = 2.23

Si = 20.9/28 = 0.75

We then divide by the smallest, which is 0.75

Cl = 2.23/0.75 = 3

Si = 0.75/0.75 = 1

The empirical formula is thus SiCl3

To get the molecular formula:

(28+3(35.5))n = 269

134.5n = 269

n = 269/134.5 = 2

The molecular formula is Si2Cl6

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3 years ago
What is the wavelength of a 3 x 1012 Hz infrared wave?
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Answer:

D

Explanation:

wavelength = speed of light/ frequency

= (3 x 10^8 m/s) / (3 x 10^12 Hz)

= 1 x 10^-4 m

5 0
3 years ago
Luis is helping his parents paint a border around the walls of a room. He uses a stencil to repeat the same design on each wall
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Answer:

Polymerization.

Explanation:

Polymerization can be defined as a type of chemical reaction in which molecules that are relatively small in size chemically combine to form a huge chain of molecules.

Simply stated, polymerization refers to a chemical reaction where two or more smaller molecules react to produce larger molecules of the same network or repetitive structural units.

In polymerization, the relatively small molecules are generally referred to as monomers while the larger molecules they produce are known as polymers.

Polymerization is given by the chemical formula;

nA -----> A(n).

In this scenario, Luis uses a stencil to repeat the same design on each wall to form one long grapevine with a bunch of grapes every foot along its length.

Hence, the type of chemical reaction this best model is polymerization because it involved repeating the same design (monomers) to form a long grapevine with a bunch of grapes (polymers).

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