This equation shows the combustion of methanol.

2CH2OH(1) +302(g) → 2C02(g) + 4H2O(g)

How many liters of carbon dioxide gas at STP are produced by the combustion of 64.0 g of methanol
(CH3OH)

A. 44.8L
B. 89.6 L
C. 11.2L. D. 22.4L

Answer:

24,901 x 1609.34 = 40074275

40074275/100 equals

400742.75 s

divided by 3600

111.31

Explanation:

Answer:

well there are many ways to prevent a pest infestation ..... as we all know ... insects such as ants love leftovers, so store food in airtight containers like Tupperware or jars with rubber seals on the lids.

Keep a tight lid on your trash can at all times and move the trash to an outside dumpster as soon as possible.

Clean your counter tops, tables, and floors on a regular basis to prevent crumbs or food buildup

Explanation:

Hope this helps:)

Answer: c) polysaccharides

Explanation:

polysacherides are made up of many monosacherides witch are glucose or sugar monomers

At a given temperature, water has a density of 0.9989 g/mL. A sample of urine at the same temperature has a density of 1.015 g/mL. Therefore, 1.016 is the specific gravity of the urine.

Specific gravity, often known as relative density, is a measurement of a material's density in relation to a reference substance. Water, that has a density of 1.0 kilogram per litre at 4 °C (39.2 °F), is typically used as a benchmark for comparing solids and liquids (62.4 pounds per cubic foot).

Dry air, which is frequently used to compare gases, has a density of 1.29 grams every litre (1.29 ounces per cubic foot) at normal circumstances (0 °C and 1 standard atmosphere).

specific gravity = density of urine/ density of water

specific gravity =  1.015 / 0.9989

                         =1.016

Therefore, 1.016 is the specific gravity of the urine.

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By using filtration, the sand and fine salt can be effectively separated based on their difference in particle size, providing a clean separation of the two components.

Filtration is a separation technique that takes advantage of the difference in particle size between sand and salt. It involves passing the mixture through a porous material, such as filter paper or a filter funnel, which allows the liquid (saltwater) and small salt particles to pass through while retaining the larger sand particles.

Here's how the filtration process can be carried out:

1. Set up a filter apparatus with a funnel and filter paper or a filter flask.

2. Place the mixture of sand and salt in a beaker or a flask.

3. Slowly pour the mixture into the filter paper or funnel, allowing the liquid (saltwater) to pass through while retaining the sand on the filter paper.

4. Once the liquid has passed through completely, the sand will be left behind on the filter paper or in the filter flask.

5. Carefully remove the sand from the filter paper or filter flask, and the saltwater solution can be collected separately.

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Answer:

Explanation:

If a zero is found between significant digits, it is significant

Answer:

56°

Explanation:

First calculate \(a:\)

\(a=2 R \sqrt{2}=2(0.1246) \sqrt{2}=0.352 \mathrm{nm}\)

The interplanar spacing can be calculated from:

\(d_{111}=\frac{a}{\sqrt{1^{2}+1^{2}+1^{2}}}=\frac{0.352}{\sqrt{3}}=0.203 \mathrm{nm}\)

The diffraction angle is determined from:

\(\sin \theta=\frac{n \lambda}{2 d_{111}}=\frac{1(0.1927)}{2(0.2035)}=0.476\)

Solve for \(\theta\)

\(\theta=\sin ^{-1}(0.476)=28^{\circ}\)

The diffraction angle is:

\(2 \theta=2\left(28^{\circ}\right)=56^{\circ}\)

There are 32.1 grams of NO gas in the cylinder if a 5.00-l cylinder at 4.00 × 103 mm hg and 23°c.

To determine the number of grams of NO gas in a 5.00 L cylinder at \(4.00 × 10^3\) mmHg and 23°C, we can use the ideal gas law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the pressure to atmospheres and the temperature to Kelvin:

4.00 × \(10^3\) mmHg = 5.26 atm (1 atm = 760 mmHg)

23°C = 296 K

Now we can rearrange the ideal gas law to solve for n:

n = PV/RT

n = (5.26 atm)(5.00 L)/(0.0821 L·atm/mol·K)(296 K) = 1.07 mol

Finally, we can convert from moles to grams using the molar mass of NO:

1.07 mol NO × 30.01 g/mol = 32.1 g NO

Therefore, there are 32.1 grams of NO gas in the cylinder.

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Answer:

Yeast is living.

Explanation:

Yeast is a type of fungus used in making bread. Fungus is a group of living organisms.

The rainwater sample has a pH of 4.35, indicating that it is acidic. The concentration of \(H_3O^+\) ions in the sample is \(4.47 * 10^{-5} M\), which is higher than in neutral or basic solutions.

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Taking into account the definition of molarity, the molarity of solution of sodium sulfate is 0.0732 \(\frac{moles}{liter}\).

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(Molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, you have:

Replacing in the definition of molarity:

\(Molarity=\frac{0.0366 moles}{0.5 L}\)

Solving:

Molarity= 0.0732 \(\frac{moles}{liter}\)

Finally, the molarity of solution of sodium sulfate is 0.0732 \(\frac{moles}{liter}\).

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A 13.0kg iron weightlifting plate has a volume of 1650cm³. Therefore, 7.87g/cm³ is the density of iron plate.

The density of a substance is described as its weight per unit volume. In other words, density is the mass-to-volume ratio or weight per unit volume. It quantifies how much "stuff" a thing possesses inside an unit of volume (cubic meter or cubic centimeter).

Density is a measure of how closely stuff is packed together. Archimedes, a Greek scientist, developed the density principle.

density= mass / volume

            = 13000/  1650

            =7.87g/cm³

Therefore, 7.87g/cm³ is the density of  iron plate.

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The concentration of the new potassium permanganate, KMnO solution is 0.06 M.

To find the concentration of the new solution, we can use the formula,

C₁V₁ = C₂V₂,

C₁ = 0.75,

V₁ = 20.0 mL,

V₂ = 250.0mL

C₂ is what we have to find. Plugging in the values we know, we get,

0.75 M x 20.0 mL = C₂ x 250.00 mL

Solving for C₂, we get the final concentration of the potassium permanganate.

C₂ = (0.75 M x 20.0 mL) / 250.00 mL

C₂ = 0.06 M

Therefore, the concentration of the solution has changed to 0.06 M from 0.75M.

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The reaction ; Fe(s) + H₂SO₄ -----> FeSO₄ + H₂ .   is a single displacement reaction ( 9 )

The reaction  Fe(s) + H₂SO₄  produces  FeSO₄ + H₂ as its product  because this is a reaction between diluted Sulfuric acid and iron. this is a single displacement reaction because the reactants and products are balanced

A single displacement reaction is a reaction wherein an element is displaced by another element in a given compound. as seen in the reaction equation written above.

Hence we can conclude that The reaction ; Fe(s) + H₂SO₄ -----> FeSO₄ + H₂ is a single displacement reaction

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It is false because NaCl has a higher bond energy than Nal.

The melting point of a substance is determined by the strength of the intermolecular forces between its atoms or ions. In the case of NaCl, the strong electrostatic attraction between the positively charged Na+ ions and the negatively charged Cl- ions results in a relatively high melting point.

In contrast, NaI is a ionic compound with a lower bond energy between the atoms. So, it has lower melting point in comparision to NaCl. So the statement is False, NaCl has a higher melting point than NaI.

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The equation for the equilibrium constant (K) of the reaction studied in this exercise can be written as follows: K = ([\(CI_20\), 2-] * [\(H_20\)(1)]) / ([\(C0_4^ 2\)-] * [Ht])

In this equation, the concentrations of the species involved in the reaction are represented by the square brackets [ ]. The subscripts indicate the stoichiometric coefficients of each species in the balanced chemical equation.

The reaction being studied involves the following species:

\(C0_4^ 2\)- (ag) + 2Ht (ag) = \(CI_20\), 2- (ag) + \(H_20\)(1)

In the equilibrium constant expression, the concentration of \(CI_20\), 2- is multiplied by the concentration of \(H_20\)(1) and divided by the product of the concentrations of \(C0_4^ 2\)- and Ht. The stoichiometric coefficients in the balanced equation are used as exponents for the concentrations of the respective species.

It is important to note that the concentrations used in the equilibrium constant expression should be in molar units (mol/L) or expressed as partial pressures for gases.

Additionally, the equilibrium constant is specific to a given temperature, and its value provides information about the relative amounts of reactants and products at equilibrium.

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Answer:

3.46

Explanation:

Hello,

This question can be solved using Henderson-Hasselbalch equation.

The dissociation equation of acetic acid in water is

CH₃COOH + H₂O ⇄ CH₃COO⁻ + H₃O⁺

pH = pKa + log([conjugate base] / [weak acid])

Conjugate base = acetic acid

Weak acid = water

pKa = 4.76

pH = 4.76 + log([0.05]/[1])

pH = 4.76 + log(0.05)

pH = 4.76 + (-1.30)

pH = 3.46

From the above solution, the pH of the solution is 3.46

Answer:0.0303495251

Explanation:

I know the answer looks weird.

If the answer is wrong then the formula for density is mass divided by volume.

The Safety Data Sheet (SDS) for regular bleach can be obtained from the manufacturer or supplier of the specific brand or product. It contains important information regarding the hazardous properties, handling, storage, and emergency procedures related to the bleach.

An SDS typically includes details such as the product's chemical composition, physical and chemical properties, potential hazards to health and the environment, precautionary measures for safe handling and storage, first-aid procedures, and information about proper disposal. It also provides guidance on personal protective equipment (PPE) to be used when handling the product and steps to take in case of accidental release or exposure.

The SDS serves as a crucial resource for understanding the potential risks associated with the use of regular bleach and helps ensure that appropriate safety measures are implemented. It is important to review and follow the information provided in the SDS to minimize the risk of accidents, injuries, or adverse health effects associated with the use of the product.

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The predominant form of ethylenediamine at pH 6.184 is H2NCH2CH2NH+3.

At pH 6.184, which is slightly acidic, the amino groups in ethylenediamine (H2NCH2CH2NH2) can partially protonate, resulting in the formation of ammonium ions (H+3NCH2CH2NH+3). The equilibrium between the neutral form and the protonated form is pH-dependent.

Therefore, at pH 6.184, the predominant form of ethylenediamine is H2NCH2CH2NH+3.

Answer:

C-air currents and gravity applied changing and unbalanced forces to the leaf.

Explanation:

Dont trust me on this, but this is what I would choose!

I hope this helps!

The leaf fell in a crooked path instead of straight down because air currents and gravity applied changing and unbalanced forces to the leaf.  Therefore, option C is correct.

The force that pulls items toward the center of a planet or other entity is called gravity. All the planets are kept in orbit around the sun by the force of gravity.

All objects with mass, including our Earth, really bend and curve spacetime, which is what causes gravity to pull you toward the ground. What you experience as gravity is that curvature.

Einstein proposed that the gravity we sense is caused by the way spacetime is shaped. Similar to how a rock bends a river's flow, a concentration of mass (or energy), like the Earth or sun, bends space around it.

Thus, option C is correct.

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Answer:

Hello is there a specific aliment you have in mind If so I can explain and tell you the answer.

The answer would be C for the gizmo. The option is Li 8/3.

Answer:

2.90

Explanation:

Any buffer system can be described with the reaction:

\(HA~->~H^+~+~A^-\)

Where \(HA\) is the acid and \(A^-\) is the base. Additionally, the calculation of the pH of any buffer system can be made with the Henderson-Hasselbach equation:

\(pH=pKa~+~Log\frac{[A^-]}{[HA]}\)

With all this in mind, we can write the reaction for our buffer system:

\(HF~->~H^+~+~F^-\)

In this case, the acid is \(HF\) with a concentration of 0.413 M and the base is \(F^-\) with a concentration of 0.237 M. We can calculate the pKa value if we do the "-Log Ka", so:

\(pKa~=~-Log(7.2X10^-^4)=~3.14\)

Now, we can plug the values into the Henderson-Hasselbach

\(pH=~3.14~+~Log(\frac{[0.237~M]}{[0.413~M]})~=~2.90\)

The pH value would be 2.90

I hope it helps!

Answer:

The answer is B

Explanation:

I am smart

Answer:

No it does not occur

Explanation:

This is because when a soda bottle is opened, CO2 is released and it's already dissolved inside the bottle. Remember, when a bottle is sealed, there's a lot of pressure compared to when it's open. So, when u open the soda bottle, the pressure decreases and CO2 escapes.

Answer:

1. Water purification method by reverse osmosis – membrane filtration

2. Method of purifying pure water by filter

3. Demineralization by ion exchange method

3. Demineralization by ion exchange method

Explanation: