Which statement is false for the balanced equation given below? (Atomic weights: N = 14.01, H = 1.008, O = 16.00). Explain your answer. 4 NH3 + 5 O2 → 4 NO + 6 H₂O a) The reaction of 4 molecules of NH3 requires 5 molecules 02 b) The reaction of one mole of NH3 requires 40 g of O2 c) The reaction of 4 moles of NH3 produces 30 g of NO d) The reaction of 17 glof NH3 will produce 27 g of water e) The reaction of 10 molecules of NH3 produces 15 molecules of H₂O​

Answer:

answer is 4.6×10 with exponent 7

Answer:

\(4.6\times10^{-7}\)

Explanation:

Remember that if the decimal point is to the right then the exponent is a negative.

\(4.6\times10^{-7}\)

Move the decimal point to the left:

\(.0.0.0.0.0.0.4.6\)

\(.0.0.0.0.0.0.4.6=0.00000046\)

Hope this helps

Answer:

Slower shutter speeds like 1/60 second and slower cause a blurring effect. If you want to take a picture using a slow shutter speed, it is best to mount the camera on a tripod and use image stabilization (such as SteadyShot® technology) to reduce the chance of any unwanted camera movement.

The first big effect of it is motion blur. If your shutter speed is long, moving subjects in your photo will appear blurred along the direction of motion. ... If you use an especially fast shutter speed, you can eliminate motion even from fast-moving objects, like birds in flight, or cars driving past.

Explanation:

The main use of hexane is as a solvent to extract edible oils from seed and vegetable crops. Hexane are used as solvents for contact cement, varnishes, and inks.

Hexanes are mostly used as a solvent. It is used to extract edible oils from seeds and vegetables and as a cleaning agent. The high levels of hexane causes mild central nervous system effects it includes dizziness, slight nausea, and headache etc.

In the construction industry, the hexane is an effective chemical which is use as the strongest organic solvents. It dissolves chemical material which allows the objects to bind together to form a strong force.

Thus,  Hexane are used as solvents for contact cement, varnishes, and inks.

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The oxidation number of chlorine in KClO3 is +5 (option A).

The oxidation number of an element is the hypothetical charge of an atom within a molecule.

The oxidation number of an element like chlorine in a compound like Pottasium chlorate can be calculated as follows:

The oxidation number of the elements in KClO3 is as follows:

1 + x - 2(3) = 0

x - 5 = 0

x = +5

Therefore, the oxidation number of chlorine in KClO3 is +5.

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Explanation:

Melting is the process of matter changing from a solid to a liquid.

Condensation is the process of matter changing from gas to liquid.

Answer: Melting, condensation.

Answer:

See explanation

Explanation:

If the spot in TLC is below the solvent front, it will be observed that the spot, instead of being separated by the solvent as expected, will just dissolve away in the solvent and zero actual separation of the mixture is achieved.

If the solute is dissolved away instead of being separated by the solvent, then the experiment fails because no actual separation of the mixture is achieved.

Hence, in TLC, the spot must be applied above the solvent front so that the capillary movement of the solvent through the plate can lead to the eventual separation of the components of the mixture since the various components of the mixture will travel at different speeds through the plate.

Also, if the solvent is above the spot, the solvent may evaporate selectively from the points above the spot while separation is ongoing.

Answer:

Q = 214.005 J

Explanation:

Given that,

Mass, m = 2.5 g

The hydrogen gas is heated from 17.0°C to 23.0°C.

The specific heat capacity of hydrogen is 14.267 J/g C.

We need to find how much energy is absorbed.

The formula for the energy absorbed is given by :

\(Q=mc\Delta T\\\\Q=2.5\times 14.267 \times (23-17)\\\\Q=214.005\ J\)

So, the required energy is 214.005 J.

The formula to find the mass in grams is =  number of moles × Molecular mass

A mole is defined as 6.02214076 × 1023 of the chemical unit, be it atoms, molecules, ions, or others as well. The mole is a convenient unit to use because of the great number of atoms, molecules, or others that are present in any substance.

To find number of moles we use the formula that is weight divided by molecular mass

From this we can find out the mass as well;

Mass = Number of moles × Molecular mass

Mass = 3.6 × 98.070 ⇒ 353.08 grams

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The limiting reagent for the reaction between 0.150 g of salicylic acid and 0.350 mL of acetic anhydride is salicylic acid, C₇H₆O₃

First, we shall determine the mass of the acetic anhydride. Details below:

Mass = density × volume

Mass of acetic anhydride, C₄H₆O₃ = 1.082 × 0.350

Mass of acetic anhydride, C₄H₆O₃ = 0.3787 g

Finally, we shall determine the limiting reagent. Details below:

C₇H₆O₃ + C₄H₆O₃ -> C₉H₈O₄ + CH₃COOH

From the balanced equation above,

138.121 g of C₇H₆O₃ reacted with 102.09 g of C₄H₆O₃

Therefore,

0.150 g of C₇H₆O₃ will react with = (0.150 × 102.09) / 138.121 = 0.11089 g of C₄H₆O₃

We can see from the above that only 0.11089 g of acetic anhydride, C₄H₆O₃ out of 0.3787 g is needed to react with 0.150 g of salicylic acid, C₇H₆O₃

Thus, the limiting reagent is salicylic acid, C₇H₆O₃

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Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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Answer:

3.36 × 10^-19 J

Explanation:

From the formula;

E= hc/wavelength

h= 6.6 ×10^-34 Js

c= 3 × 10^8 ms-1

Wavelength= 589 ×10^-9 m

E= hc/ wavelength

E=6.6 ×10^-34 × 3 × 10^-8/ 589 ×10^-9

E= 3.36 × 10^-19 J

Answer:

Explanation:

physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.

Answer:

Anything that takes up space.

Explanation:

Anything that has both volume and mass.

Compared to 2,3,4-trifluoropentane, the nonane's carbon chains are longer.

A substance's molar mass is defined as its molecular weight in grams. By adding the molar masses of a substance's constituent atoms, we may get the substance's molar mass. Then, to convert between mass and the quantity of moles of the material, we may utilize the computed molar mass.

Adding the atomic masses of a particular substance results in the calculation of molar mass. Below each element's symbol on the periodic table is a designation of the mass of that specific element. The molar mass is obtained by averaging the atomic masses obtained from the periodic table.

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Answer:

5-methylhex-1-yne//5-methylhex-2-yne//2-methylhex-3-yne

Explanation:

We have to start with the information on the IR spectrum. The signal at 3300 is due to a C-H bend sp carbon and the signal in 2200 is due to the stretch carbon-carbon. Therefore we will have an alkyne. Now if we have 2-methylhexane as the product of hydrogenation we have several options to put the triple bond. Between carbons 1 and 2 (5-methylhex-1-yne), between carbons 2 and 3 (5-methylhex-2-yne) and between carbons 3 and 4 (2-methylhex-3-yne). On carbon 5 we have a tertiary carbon therefore we dont have any other options.

See figure 1

I hope it helps!

Answer:

\(V_{NO}=2.8L\)

Explanation:

Hello!

In this case, we consider the given reaction to realize there is a 5:4 mole ratio between oxygen and nitrogen monoxide; thus, we infer that, at STP conditions, such mole ratio is eligible as a volume ratio too; therefore, the produced liters of nitrogen monoxide gas is:

\(V_{NO}=3.5LO_2*\frac{4LNO}{5LO_2} \\\\V_{NO}=2.8L\)

Best regards!

Answer:2m

Explanation:

4/2=2

The wavelength will be "2 m".

Given values are:

Frequency,

Speed,

As we know,

→ \(Frequency(f) = \frac{Speed (v)}{Wavelength (\lambda)}\)

or,

→                     \(\lambda = \frac{v}{f}\)

By substituting the values, we get

→                        \(=\frac{4}{2}\)

→                        \(= 2 \ m\)

Thus the above response is correct.

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Answer:

Oxygen has 6 valence electrons and follows the octet rule.

If you were drawing a lewis structure for O2, there would be a total of 12 valence electrons (6 x 2 = 12).

The completed structure would have a double bond between the two oxygen atoms with 2 lone pairs per oxygen, giving you a total of 8 electrons that are lone pairs (or dots).

They can only hold 2 electrons in the first outershell

A total of 149 oranges would be needed

Every 3 oranges squeezed yields 10 oz of juice.

A cup of juice is 8 oz. Thus, in order to make a cup of juice, the number of oranges required will be:

                 3 x 8/10 = 2.4 oranges.

For 2 cups = 2.4 x 2 = 4.8 oranges.

Each guest wants to have 2 cups of juice. This means that each guest needs 4.8 oranges in order to have 2 cups of juice.

There are 62 guests in total. The total number of oranges required can, thus, be estimated as;

         62 x 4.8 = 148.8 oranges

Since there are no orange fractions, it means that a total of 149 oranges will be required in order to take care of the guest.

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Answer:

Hydrogen

Explanation:

Answer:

false

Explanation:

A liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is vinegar; (i) removing KMnO₄, stains is sodium metabisulfite solution; drying acid anhydrides is concentrated sulfuric acid.

Solvents are substances usually liquids, but may also be gases or solids that dissolve other substances known as solutes.

Solvents are usually used as cleansing agents.

One possible liquid substance that could be used for dissolving dry mortar on floor tiles is a mild acid solution, such as diluted hydrochloric acid or vinegar.

KMnO₄ stains are often difficult to remove, but one substance that can be used is sodium metabisulfite (Na₂S₂O₅) solution. Sodium metabisulfite acts as a reducing agent and can effectively neutralize and remove KMnO₄ stains.

Concentrated sulfuric acid is commonly used in the laboratory as a drying agent. It has a strong affinity for water and can efficiently absorb moisture, including water present in acid anhydrides.

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Answer:

2HCl(aq)+K2CO3(aq)→H2O(l)+CO2(g)+2KCl(aq)

Explanation:

HCl(aq)+K2CO3(aq)→H2O(l)+CO2(g)+KCl(aq)

2HCl(aq)+K2CO3(aq)→H2O(l)+CO2(g)+2KCl(aq)

H-1*2=2                                      H-2

Cl-1*2=2                                     Cl- 1*2=2

K -2                                           K-1*2=2

C- 1                                           C-1

O - 3                                        O-3

Answer: 8.979

Explanation:

Answer:

a

Explanation:

Answer:

A

Explanation:

Density is the amount of space that atoms are compacted in a substance.Apr 25, 2017

We gain oxygen from trees through the process of photosynthesis. Photosynthesis is the biochemical process in which green plants, including trees, use sunlight, water, and carbon dioxide to produce oxygen and glucose (a form of sugar).

Trees have specialized cells called chloroplasts, which contain a pigment called chlorophyll. Chlorophyll absorbs sunlight energy.

The tree's leaves capture sunlight and use it to convert carbon dioxide (CO2) from the air and water (H2O) from the roots into glucose (C6H12O6) and oxygen (O2).

During photosynthesis, the chlorophyll in the chloroplasts helps to split water molecules into hydrogen ions (H+) and oxygen atoms (O). The oxygen atoms then combine to form O2 molecules.

The oxygen produced during photosynthesis is released into the atmosphere through tiny pores called stomata found on the surface of the tree's leaves. From there, it mixes with the surrounding air and becomes available for us to breathe.

In summary, trees produce oxygen as a byproduct of photosynthesis. They play a crucial role in maintaining the balance of oxygen and carbon dioxide in the atmosphere, providing us with the oxygen we need for respiration.

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