Please answer these questions
1) In the chemical reaction for aerobic cellular respiration, water is one the production. However, when cells undergo fermentation, no water is produced. Why not?
2) Why do you think the yeast are more able to use some sugar molecules than others?

This is unrealistic because matter is needed to transmit sound waves and is therefore denoted as option B.

This is defined as a disturbance that travels through a medium with an accompanying transfer of energy.

Light waves don't require materials for its propagation which is why it can travel through a vacuum. However sound waves require materials and can't travel in a vacuum.

This is therefore it is unrealistic for a large explosion to be heard in space which is a form of vacuum and is therefore the most appropriate choice.

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Answer:

Large explosions are more likely to create seismic waves, not sound and light.

Explanation:

Im stuck on this question too but i think this is the answer, i will try to edit it for the right answer. if its wrong and i cant fix it then i will comment it

Answer:

4

Explanation:

Nitrogen (N)

hydrogen (H)

sulfur (S)

oxygen (O)

Answer:

uses of acids

Vinegar: Often used in the kitchen, it includes 3-6% acetic acid.  

Lemon and Orange Juice: Most people drink them everyday, but little do they know that they contain citric acid.

Industrial Uses: Nitric acid and sulphuric acid are both used commonly in fertilizers, dyes, paints and explosives.  

Batteries: Sulphuric acid is used in batteries which run in cars and flashlights to name a few.  

Dissolving: Hydrochloric acid is used to make aqua regia, which is used to dissolve noble metals such as gold and platinum.  

Fertilizers: Fertilizers are often produced using sulphuric acid.  

i hope this will help you :)

Answer:

Yes. Since for a substance to be a Bronsted-Lowry acid they have to be able to donate protons, and to be a Lewis acid a substance would have to accept electrons, there are substances which cannot donate protons but can accept electrons.

Explanation:

Hope this helped!

Answer:

Evaporation turns water droplets into gas, while condensation turns water vapor into a liquid.

Explanation:

Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.

Condensation is the process by which water vapor in the air is changed into liquid water; it's the opposite of evaporation

Given what we know, we can confirm that since Mr. Summers has to test a hypothesis, his next step should be to design an experiment.

Therefore, we can confirm that Mr. Summers must design an experiment given that this is the best way to gather data in order to be analyzed in the future and draw a valid conclusion.

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In an electrolytic cell, a chloride ion would migrate through the solution to the positive electrode.

In an electrolytic cell, ions follow a specific path depending on their electronegativity and the location of electrode reactions.

From a general perspective, cations (positively charged ion) head towards the negatively charged electrode known as cathodes since this is where reduction takes place. Here they receive electrons resulting in their transformation into neutral atoms or molecules.

On the contrary, anions (negatively charged ion) will migrate towards positive electrodes - namely anodes - as these are sites for oxidation which entails loss of electrons to produce uncharged forms. In this case, chloride ion is negatively charged ion.

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Answer:

H20 only

Explanation:

It's because that When a chemical forms, It turns into a product. The product can't just float away, but byproducts can.

Answer:

314mL OR 0.314L

Explanation:

this requires the dilution formula M1V1 = M2V2 where

M1 = initial concentration

V1 = initial volume

M2 = final concentration

V2 = final volume

In this case, we are solving for V1 where M1 = 5.65M, V1 = 250.0 mL, and M2 = 4.50M

Plugged into the equation we get:

(5.65M)(250.0mL) = (4.50M)V2

divide both sides by 4.50M and it becomes (M cancel)

V2 = 314mL

What are the relative w/v concentrations of lactic acid, citric acid, and boric acid if the mixture's specific gravity is 0.781? What are the % weight-to-volume conversions if the mixture's specific gravity is 0.781?

(Density of the solution / Water Density)

density of mixture = (specific gravity of mixed * density of waters) = (0.781 * 1) = 0.781 g/mL density = (mass/volume) specific gravity = 0.781

Lactic acid concentration in the mixture = (mass of latic acid / quantity of mixture) *100 = (4/128.04)100 = 3.12%. Volume of mixture = (mass / density) = (100 /0.781) =128.04 mL.

What level of fluoride ion should be present in drinking water?

Detailed Solution: 1 mg/l

1.50 mg per liter is the proper answer. The World Health Assembly advised that the maximum allowed level of fluoride present in drinking water for a number of nations, including Canada, China, India, Argentina, and the European Union, be 1.5 mg/l. A fluoride level of 1 mg/l is ideal for drinking water.

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The w/v levels of lactic acid, benzoyl peroxide, plus trichloroacetic acid as in combination are 1.56% if the mixture has a specific gravity of 0.781.

1 mg/l 1.50 mg per liter is the proper answer. The World Health Assembly advised that the maximum allowed level of fluoride present in drinking water for a number of nations, including Canada, China, India, Argentina, and the European Union, be 1.5 mg/l. A fluoride level of 1 mg/l is ideal for drinking water.

(Density of solution / Water Density) = Specific Gravity

density of mixture = (specific gravity of mixed * densities of water) = (0.781 * 1) = 0.781 g/mL density = (mass/volume) specific gravity = 0.781

Volume of the mixture = (Mass of Lactic Acid / Volume of the mixture) = (100 /0.781) =128.04 mL w/v Amount of Lactic in the mixture Salicylic acid concentration in the mixture is *100 = (4/128.04)100 = 3.12% w/v = (mass of Salicylic / volume of mixture). Trichloroacetic acid concentration in the combination: *100 =(5/128.04)100 = 3.9% w/v (i.e., (mass of Trichloroacetic acid / volume of mixture) *100 =(2/128.04)100 = 1.56%

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Answer:

He

Explanation:

Helium is the only atom on the list with 2 protons and 2 neutrons

The food sample contained starch and reducing sugar (carbohydrates).

The Benedict's test is used to test for the presence of reducing sugars, such as glucose, in a sample. When the Benedict's solution is added to a sample containing reducing sugars and heated, the solution will turn brick red.

The iodine test is used to test for the presence of starch in a sample. When iodine solution is added to a sample containing starch, it will turn blue-black.

So, in this case, the student can conclude that the food sample contained both starch and reducing sugars, as both tests produced positive results.

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Answer:

2 mol/L

Explanation:

molarity = moles/litres

NaOH = 23 + 16 + 1 = 40 g/mol

\( ? \: mol \: naoh \: = 8 \: g \: naoh \: \times \\ \frac{1 \: mol \: naoh}{40 \: g \: naoh} = 0.2 \: mol \: naoh\)

molarity = 0.2 mol/0.1 L = 2 mol/L

Answer:

2.85868104g

Explanation:

Actual yield

Theoretical yield            x 100 = 51.7877%

So, do the inverse and you get 2.85868104g

Answer:

7.63 × 10²³ molecules

Explanation:

First, convert grams to moles using the molar mass of water (32.988 g/mol).

41.8 g  ÷  32.988 g/mol  =  1.267 mol

Next, convert moles to molecules using Avogadro's number (6.022 × 10²³).

1.267 mol  ×  6.022 × 10²³ molecules/mol = 7.63 × 10²³ molecules

The carbon–carbon bonds in naphthalene are not of the equal length. The bonds C₁–C₂, C₃–C₄, C₅–C₆ and C₇–C₈ are about 1.36 Å in length, whereas the other carbon–carbon bonds are about 1.42 Å long.

Naphthalene is two benzene rings joined together. It has three resonance structures. The double bonds present in the benzene ring are delocalized by intramolecular electron transfer to achieve stability. This is called resonance and these structures can be called resonance structures.

The C-C bond length in naphthalene is not the same. This is because naphthalene has a fused ring structure in which two benzene rings are fused. Single and double bonds are alternating, so the lengths of single and double bonds are different.

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Answer:

B. Biosphere.

Explanation:

Answer:

Explanation:

Answer:

This is a change in an objects motion caused by an unbalanced force.

- Acceleration

Answer:

Pressure

Pressure is done when a force is applied to an object to course a motion

Answer:

true

Explanation:

Answer:

B

Explanation:

An increase of 1 pH number represents  A decrease in hydrogen ion concentration by a factor of 10 and the correct option is option B.

pH is defined as the negative logarithm of H⁺ ion concentration.

pH is a measure of how acidic or basic a substance is. In our everyday routine, we encounter and drink many liquids with different pH. Water is a neutral substance. Soda and coffee are often acidic.

The pH is an important property, since it affects how substances interact with one another and with our bodies. In our lakes and oceans, pH determines what creatures are able to survive in the water.

Therefore, An increase of 1 pH number represents a decrease in hydrogen ion concentration by a factor of 10 and the correct option is option B.

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The volume of the balloon when found, considering no helium escape, would be 0.74 L.

Charles's Law states that at constant pressure, the volume of a gas is directly proportional to its temperature in Kelvin (K). The equation can be written as:

V₁ / T₁ = V₂ / T₂

Where V₁ and T₁ are the initial volume and temperature, and V₂ and T₂ are the final volume and temperature.

In this case, the initial volume (V₁) is 0.80 L and the initial temperature (T₁) is 27°C, which needs to be converted to Kelvin (K). Adding 273.15 to the Celsius value gives us 300.15 K.

The final temperature (T₂) is 22°C, which converts to 295.15 K.

Using the formula, we can find the final volume (V₂):

V₂ = (V₁ * T₂) / T₁

V₂ = (0.80 L * 295.15 K) / 300.15 K

V₂ ≈ 0.788 L

Therefore, the volume of the balloon when found, assuming no helium escape, would be approximately 0.788 L or 0.74 L when rounded to two significant figures.

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Answer:

40.06

Explanation:

(23 * 39) + (48 * 40) + (29 * 41)

                   100

= 40.06

formula:

(% of isotope A * mass of A) + (% of isotope B * mass of B) ......

                                        100

Answer:

yes it can be broken down

Answer:

−7.389056fo3+5.436564f

−l2o3+2l

Explanation:

2al+f(2.7182822)o3=al2o3+2f(2.718282)

Step 1: Add -al^2o^3 to both sides.

7.389056fo3+2al+−al2o3=al2o3+5.436564f+−al2o3

−al2o3+7.389056fo3+2al=5.436564f

Step 2: Add -7.389056fo^3 to both sides.

−al2o3+7.389056fo3+2al+−7.389056fo3=5.436564f+−7.389056fo3

−al2o3+0fo3+2al=−7.389056fo3+5.436564f

Step 3: Factor out variable a.

a(−l2o3+2l)=−7.389056fo3+5.436564f

Step 4: Divide both sides by -l^2o^3+2l.

a(−l2o3+2l)

−l2o3+2l

=

−7.389056fo3+5.436564f

−l2o3+2l

a=

−7.389056fo3+5.436564f

−l2o3+2l

132 gm of CO₂ is generated by combustion of 342 gm of C₈H₁₈.

The molar mass of a chemical compound is defined as the ratio between the mass and the amount of that substance in any sample. A material's molar mass is a bulk characteristic rather than a molecular one.

The molar mass of a substance is its mass expressed in grams per mole. G/mol, or grams per mole, is the sign for molar mass. The ratio between the mass of an isotope and the mass of the isotope carbon is known as the isotopic atomic mass, or mass of a single isotope of any particular element. -12

The reaction is :

C₈H₁₈ + 12.5O₂ ----> 8CO₂ + 9H₂O

Molar mass of C₈H₁₈ is = 12*8 + 18*1 = 114 gm

Molar mass of CO₂ is = 12+ 16*2 = 44gm

44gm of CO₂ is generated by 114 gm of C₈H₁₈

1 gm of CO₂ is generated by 114/44 gm of C₈H₁₈

132 gm of CO₂ is generated by combustion of 114*132/44 = 342 gm of C₈H₁₈

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Answer:Respuesta. El peso molecular de NaCl es 58gr que equivale a 1 mol. g? hay 0,5mol queda 29gr

Explanation:

Answer:

10.2 °C

Explanation:

If all other variables are held constant, you can find the new temperature using the Charles' Law equation. The equation looks like this:

V₁ / T₁ = V₂ / T₂

In this equation, "V₁" and "T₁" represent the initial volume and temperature. "V₂" and "T₂" represent the final volume and temperature. You can find the new temperature by plugging the given values into the equation and simplifying.

V₁ = 122 mL                     V₂ = 50 mL

T₁ = 25 °C                        T₂ = ? °C

V₁ / T₁ = V₂ / T₂                                         <----- Charles' Law equation

122 mL / 25 °C = 50 mL / T₂                    <----- Insert values

4.88 = 50 mL / T₂                                     <----- Divide 25 from 122

4.88 x T₂ = 50 mL                                    <----- Multiply both sides by T₂

T₂ = 10.2 °C                                             <----- Divide both sides by 4.88

In the given chemical reaction, 4HCI (g) reacts with O2 (g) to form 2H2O (g) and 2Cl2 (g). If we consider 4HCI as the reactant with the most initial moles, then its chemical formula is HCl.

HCl, or hydrogen chloride, is a colorless and highly reactive gas that is widely used in various industrial processes. It is commonly used as a starting material for the production of other chemicals such as PVC and Teflon. In this reaction, HCl moles reacts with O2 to form H2O and Cl2. H2O, or water, is a common and essential compound reaction that is widely used in various industries, including agriculture, pharmaceuticals, and personal care products. Cl2, or chlorine, is a highly reactive gas that is widely used in the production of various moles chemicals, such as bleach and other disinfectants. In conclusion, the chemical reaction moles between 4HCI and O2 can result in the formation of water and chlorine, which have significant industrial applications. The most number of initial moles are of HCL

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Answer:

The volume of the marble is 10 mL.

Explanation:

From the question given above, the following data were obtained:

Volume of water = 10 mL

Rise in water = 10 mL

Volume of marble =.?

From the question given above, the water level rise by 10 mL when a glass marble was placed into the water.

This is equally the volume of the marble as the marble will displace it's volume when placed in the water according to Archimedes' principle.

Therefore,

Rise in water = 10 mL = volume of marble.

Answer:

Explanation: