Which factor can cause acceleration to decrease?

Answer:

We use the following formula as given below Use the formula below to find the lone pair on the oxygen atom of the SO3 molecule. L.P (O) = V.E (O) – N.A (S-O) Lone pair on the terminal oxygen atom in SO3 = L.P (O)

Explanation:

The volume of the aqueous solution of sodium sulfate required is 153.85 mL.

The number of moles of the salt in the given mass is calculated as follows;

moles = reacting mass / molar mass

molar mass of  sodium sulfate = 142 g/mole

moles = (4.27) / (142)

moles = 0.03 mole

Concentration = moles/volume in liters

0.195 = 0.03/V

V = 0.03/0.195

V = 0.15385 liters

V = 153.85 mL

Thus, the volume of the aqueous solution of sodium sulfate required is 153.85 mL.

Learn more about volume here: https://brainly.com/question/1972490

#SPJ1

Answer:

First one

Explanation:

Because water molecules at the surface of the water puddle attract more to one other than they do to the air molecules above them

Answer:

Question 2:

Cohesion and adhesion

Water has forces of attraction between different molecules, so its molecules are locomotive.

Question 3:

Surface tension

It experiences a perpendicular force which keeps the area of the pepper on surface

\({}\)

Answer:

2 H2 + 1 O2 → 2 H2O

Explanation:

Answer:

1730 cm

0.00256 km

5130 mm

Answer: I think its a hypothesis.

Answer:

down syndrome is research because you research the three sets of chromosome 21

Explanation:

Answer:

The element was one of the alkaline metals, the dull appearance comes from the metal reacting with oxygen and oxidizing its outer surface as alkaline are known for their enormous reaction with oxygen in the air and water.

Another ability of this group of elements is the ability to conduct electricity. And they are also easy to cut with a kitchen knife.

The total mass of the mixture is 80.5 g. The analysis of the calculation shows that there should be three significant figures in the end result.

This is an addition operation, and when dealing with addition and subtraction operations it is necessary to consider the last significant figure for each of the numbers. The result of the addition/subtraction should have the same last significant figure as the number with the leftmost (or highest) last significant figure. When applied to this calculation, the principle looks like this:

30.05 - the last significant figure is 5, and it is in the hundredths

50.0 - the last significant figure is 0, in the tenths

0.4006 - the last significant figure is 6, in the ten thousandths.

Of the three, the leftmost/highest significant figure is 0 in the tenths, so the end result should also have its last significant figure in the tenths.

30.05 g + 50.0 g + 0.4006 g = 80.4506 g, but we round up to the tenths, and because the numbers after 5 are greater than 0, we have to round up to reach the end result of 80.5 g

You can learn more about significant figures here:
brainly.com/question/28724989

#SPJ4

Answer:

C.

Explanation:

Butane (C4H10) has 3 C-C bonds in the carbon chain and 10 C-H bonds

Butane (\(C_4H_10\)) has 3 C-C bonds in the carbon chain and 10 C-H bonds

Alkanes are saturated hydrocarbons. This means that their carbon atoms are joined to each other by single bonds.

Based on the diagram, butane is considered to be an alkane. It not only contains single covalent bonds, but also has carbon and hydrogen atoms present in its structure.

When comparing both structures to one another, isobutane is a branched chain, while butane is a linear chain.

Learn more about alkane here:

https://brainly.com/question/4260635

#SPJ2

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, sodium and potassium are the two element  most likely to have similar physical properties.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

The chances are high that sodium and potassium share both physical and chemical characteristics. They are both members of the Alkali metals family. Both are extremely reactive and share the same valence electrons. The elements in the same group have same physical and chemical properties.

Therefore, sodium and potassium are the two element  most likely to have similar physical properties.

To know more about element, here:

https://brainly.com/question/8460633

#SPJ5

The purpose of adding base in the aldol condensation reaction is c) Deprotonate α-carbon to generate electrophile.

What is aldol condensation?

Aldol condensation is a reaction in organic chemistry that involves the condensation of two carbonyl compounds, typically an aldehyde and a ketone, to form a β-hydroxy carbonyl compound.

In the aldol condensation reaction, a base is added to deprotonate the α-carbon of the carbonyl compound, typically an aldehyde or a ketone. The deprotonation of the α-carbon generates an enolate ion, which is an excellent nucleophile. This deprotonation step is crucial in generating the reactive electrophile necessary for the aldol condensation reaction.

By deprotonating the α-carbon, the base increases the electron density on the carbon atom, making it more nucleophilic and prone to react with another carbonyl compound. This enables the formation of a new carbon-carbon bond, resulting in the formation of an aldol product.

Therefore, the purpose of adding a base in the aldol condensation reaction is to deprotonate the α-carbon and generate an electrophilic enolate ion, which can then react with another carbonyl compound to form the desired product.

To know more about aldol condensation, refer here:

https://brainly.com/question/31558115

#SPJ4

The percent yield of H₂O, if 87.0 g of H₂O is produced by combining 95.0 g of O₂ and 11.0 g of H₂ is 87.87%.

Mass of any substance will be calculated by using their moles as:

n = W/M, where

W = given or required mass

M = molar mass

Moles of 95g of Oxygen (O₂) = 95g / 32g/mol = 2.96 moles

Moles of 11g of hydrogen (H₂) = 11g / 2g/mol = 5.5 moles

Given chemical reaction is:
2H₂ + O₂ → 2H₂O

From the stoichiometry of the reaction, it is clear that:

1 moles of O₂ = reacts with 2 moles of H₂

2.96 moles of O₂ = reacts with 2×2.96=5.92 moles of H₂

Here hydrogen is the limiting reagent as it has lower moles and formation of water depends on this only.

2 moles of H₂ = produces 2 moles of water

5.5 moles of H₂ = produces 5.5 moles of water

Mass of 5.5 moles of water will be calculated as:

W = (5.5mol)(18g/mol) = 99g

Given theoretical yield of water = 87g

% yield of water will be calculated as:
% yield = (87 / 99)×100 = 87.87%

Hence required value is 87.87%.

To know more about % yield, visit the below link:

https://brainly.com/question/25996347

Answer:

D

Explanation:

Answer:

The chemical element with the lowest boiling point is Helium and the element with the highest boiling point is Tungsten.

The statement that describes a solution of CH₃COOH at pH of 6.4 is B. [CH₃COOH] < [CH₃COO⁻].

The pKa of CH₃COOH is 4.76, which means that at a pH of 4.76, the concentration of CH₃COOH and CH₃COO⁻ will be equal.

As the pH increases above 4.76, the concentration of CH₃COO⁻ will increase relative to CH₃COOH, while at a pH below 4.76, the concentration of CH₃COOH will be higher than that of CH₃COO⁻.

Given a pH of 6.4, which is above the pKa of CH3COOH, the solution will be more basic and the concentration of CH₃COO⁻ will be higher than that of CH₃COOH.

This means that the statement that describes a solution of CH₃COOH at pH of 6.4 is B. [CH₃COOH] < [CH₃COO⁻].

This indicates that the solution is mostly composed of CH₃COO⁻ ions, which makes it a weak base.

Therefore, the solution will have a slightly bitter taste and will not be as acidic as pure CH₃COOH.

The solution will also be able to act as a buffer solution, as it can resist changes in pH when small amounts of an acid or base are added.

Learn more about pKa at

https://brainly.com/question/30419524

#SPJ11

The time taken for the same volume of methane gas to diffuse is 7.1 s.

The rate at which a given mass of diffuses is inversely proportional to the molar mass of the gas.

\(\frac{t_2}{t_1} = \sqrt{\frac{M_2}{M_1} }\)

where;

\(\frac{t_2}{t_1} = \sqrt{\frac{M_2}{M_1} }\\\\\frac{t_2}{20} = \sqrt{\frac{2}{16} }\\\\\frac{t_2}{20} = \frac{\sqrt{2} }{4} \\\\t_2 = \frac{20\sqrt{2} }{4} \\\\t_2 = 5\sqrt{2} \\\\t_2 = 7.1 \ s\)

Thus, the time taken for the same volume of methane gas to diffuse is 7.1 s.

Learn more about rate of gas diffusion here: https://brainly.com/question/26696466

The time it takes for hydrogen to diffuse is 7.07 seconds

To calculate the time it will take hydrogen gas to diffuse, we use the formula from Graham's law of diffusion.

Formula:

Where:

Make T the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The time it takes for hydrogen to diffuse is 7.07 seconds.

Learn more about Graham's law of diffusion here: https://brainly.com/question/22359712

Mass of Oxygen : 47.9

Given

2S03 (g)⇒ 2S02 (g) + O2 (g)

240 g SO3

Required

mass of Oxygen

Solution

mol SO3 :

= 240 g : 80.1 g/mol

= 2.996

From the equation, mol O2 :

= 1/2 x mol SO3

= 1/2 x 2.996

= 1.498

mass O2 :

= 1.498 mol x 32 g/mol

= 47.9

Taking into account the reaction stoichiometry, given a 240.0 g sample of sulfur trioxide, 47.95 grams of oxygen are produced, assuming the decomposition goes to completion.

In first place, the balanced reaction is:

2 SO₃ → 2 SO₂ + O₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 160.2 grams of SO₃ form 32 grams of O₂, 240 grams of SO₃ form how much mass of O₂?

\(mass of O_{2} =\frac{240 grams of SO_{3}x 32 grams of O_{2} }{160.2grams of SO_{3}}\)

mass of O₂= 47.94 grams

Given a 240.0 g sample of sulfur trioxide, 47.95 grams of oxygen are produced, assuming the decomposition goes to completion.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

From the information presented in the question, the number of molecules present of water present is obtained 2.41 × 10^21 molecules.

From the information we have;

Volume of the damp air =  1 L

Pressure of the damp air =  741.0 torr or 0.975 atm

Temperature of the gas = 20 oC + 273 = 293 K

R = 0.082 atm LK-1mol-1

Number of moles = ?

n =PV/RT

n = 0.975 × 1/0.082 ×  293

n = 0.041 moles

Volume of water vapor = 1 L

Temperature of water = -10 oC + 273 = 263 K

Pressure of the gas = 607.1 torr or 0.799 atm

R = 0.082 atm LK-1mol-1

n= PV/RT

n = 0.799 × 1/ 0.082 × 263

n = 0.037 moles

Number of moles of water = 0.041 moles -  0.037 moles = 0.004 moles

If 1 mole = 6.02 × 10^23 molecules

0.004 moles = 0.004 moles × 6.02 × 10^23 molecules/1 mole

= 2.41 × 10^21 molecules

Learn more: https://brainly.com/question/2510654

Using a substance’s rate of decay to determine its age is an example of absolute dating.

Absolute dating techniques offer more precise dates and times of origin, such as a range in age in years. Depending on the approach employed, these dates may or may not be precise.

Absolute age dating involves analysing an object's physical characteristics to ascertain its age. An earth material's true age, expressed in years, is known as its absolute age. Scientists can establish the relative age of a material by comparing the ages of two or more earth materials. Although both absolute and relative dating provide age estimates, they do so in distinct ways and yield different outcomes.

When archaeologists and geologists find artefacts at a dig site, they want to know how old the objects are so they can understand the area they are researching and how life might have been there in the past. When figuring out how ancient these objects are, absolute age dating is a crucial technique. It might be significant in determining a fossil's precise age. In order to construct a chronological history of life on Earth, this aids scientists in figuring out when specific types of organisms were alive.

To know more about absolute dating from the link

brainly.com/question/868048

#SPJ4

O2

Explanation:

Wanna play among us?

Given the data from the question, the sample of the glucose contain 6.04×10²¹ atoms of hydrogen

1 mole of substance = 6.02×10²³ atoms

From the formula of glucose, C₆H₁₂O₆, we can see that the mole ratio of carbon to hydrogen is:

Ratio = carbon / hyddrogen

Ratio = 6 / 12

Thus, for every 6 moles of carbon, there are 12 moles of hydrogen.

Thus, we can determine the number of atoms of hydrogen present in the compound as follow:

6 moles of carbon = 12 moles of hydrogen.

Therefore,

3.02×10²¹ atoms of carbon = (3.02×10²¹ × 12) / 6

3.02×10²¹ atoms of carbon = 6.04×10²¹ atoms of hydrogen

Thus, the number of atoms of hydrogen present in the compound is 6.04×10²¹ atoms

Learn more about Avogadro's number:

https://brainly.com/question/26141731

#SPJ1

Answer:

D

Explanation:

^

Answer:

the answer is D

Explanation:

I hope this helped.

An ice cube at 0°C is placed in a very large bathtub filled with water at 30°C and allowed to melt, causing no appreciable change in the temperature of the bath water. The entropy of the system (ice plus water) increases because the process is irreversible will be true

Entropy

Hence, An ice cube at 0°C is placed in a very large bathtub filled with water at 30°C and allowed to melt, causing no appreciable change in the temperature of the bath water. The entropy of the system (ice plus water) increases because the process is irreversible will be true

Learn more about the entropy on

https://brainly.com/question/23749044

#SPJ4

The amount of current generated, given that the circuit offers 40 ohms resistance, and is connected to a 60 V supply is 1.5 A

The following data were obtained from the question given above:

Ohm's law states as follow:

Voltage (V) = Current (I) × resistance (R)

Using the above formula, the current generated by the circuit can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

60 = Current × 40

Divide both sides by 40

Current = 60 / 40

Current = 1.5 A

Thus, the current generated in the circuit is 1.5 A (None of the options are correct)

Learn more about current:

https://brainly.com/question/23754329

#SPJ1

Condensation is a process of conversion of the gaseous phase into liquid phase whereas accretion is a process of accumulation of small particles into larger ones over a period of time.

Condensation is the process by which water vapor in the air is changed into liquid water it's generally the opposite of evaporation. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

Accretion is the accumulation of smaller particles into a massive object by gravitationally pulling more matter towards itself, typically gaseous matter, in an accretion process. Most astronomical objects, such as galaxies, stars, and planets, are formed by the same accretion processes itself.

Accretion from natural causes, that  adds soil, sand, and also other types of earth to the part of a person's property that generally borders water. While this occurs very slowly, a piece of property may grow a lot overtime and also may increase its value.

To know more about condensation and accretion

https://brainly.com/question/28915765

#SPJ4

The pH of the buffer solution containing 0.225 M acetic acid and 0.375 M sodium acetate is approximately 4.96 and after the addition of 10.0 ml of 0.318 M NaOH to the 100.0 ml buffer solution, the pH is approximately 4.90.

To calculate the pH of a buffer solution containing acetic acid (CH3COOH) and sodium acetate (CH3COONa), we need to consider the equilibrium between the weak acid and its conjugate base. The dissociation of acetic acid can be represented by the equation:

CH3COOH ⇌ CH3COO- + H+

The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA])

where pKa is the negative logarithm of the acid dissociation constant (Ka), [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

In this case, acetic acid is a weak acid with a pKa of 4.74. The given concentrations are 0.225 M for acetic acid ([HA]) and 0.375 M for sodium acetate ([A-]). Plugging these values into the Henderson-Hasselbalch equation, we can calculate the pH of the buffer solution.

pH = 4.74 + log (0.375/0.225)

pH = 4.74 + log (1.67)

pH ≈ 4.74 + 0.221

pH ≈ 4.96

Therefore, the pH of the buffer solution containing 0.225 M acetic acid and 0.375 M sodium acetate is approximately 4.96.

In the second part of the question, we need to determine the pH of the buffer solution after adding 10.0 ml of 0.318 M NaOH to 100.0 ml of the buffer. Since NaOH is a strong base, it will react with the weak acid (acetic acid) in the buffer to form the conjugate base (acetate ion) and water. This reaction consumes the weak acid and shifts the equilibrium towards the conjugate base.

To calculate the new pH, we need to consider the change in concentration of the weak acid and the conjugate base. From the given volumes and concentrations, we can determine the moles of acetic acid and acetate ion:

Moles of acetic acid = 0.225 M × 0.100 L = 0.0225 mol

Moles of acetate ion = 0.375 M × 0.100 L = 0.0375 mol

After the addition of 10.0 ml (0.010 L) of 0.318 M NaOH, we can calculate the new concentrations:

New concentration of acetic acid = (0.0225 mol - 0.010 L × 0.318 mol/L) / (0.100 L + 0.010 L) = 0.195 M

New concentration of acetate ion = (0.0375 mol + 0.010 L × 0.318 mol/L) / (0.100 L + 0.010 L) = 0.285 M

Using the Henderson-Hasselbalch equation with the new concentrations, we can calculate the new pH:

pH = 4.74 + log (0.285/0.195)

pH = 4.74 + log (1.46)

pH ≈ 4.74 + 0.164

pH ≈ 4.90

Therefore, after the addition of 10.0 ml of 0.318 M NaOH to the 100.0 ml buffer solution, the pH is approximately 4.90.

Learn more about buffer solution  here :
brainly.com/question/31367305

#SPJ11

Answer:

compact fluorescent light

The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

Find out more on matter here: https://brainly.com/question/3998772

#SPJ1

(a) Corrosion Penetration Rate (CPR) is a measurement of the thickness of a material's corrosion layer in terms of linear millimeters per year. Corrosion Penetration Rate is an important parameter that is widely used in the corrosion field to estimate the corrosion rate of a metal.

The penetration rate is determined by exposing a metal sample to the corrosive environment and measuring the quantity of metal that has been lost due to corrosion over a certain period of time. The formula used to calculate CPR is: CPR = Weight loss of the sample (mg) x 31556926.0 / A x D x t Where, A= Surface area of the sample (m²), D= Density of the sample (g/cm³), t= Exposure time in seconds

(b)Deterioration mechanism of polymetric materials:

(i) Thermal degradation: It is the process in which chemical decomposition occurs when a polymer is exposed to elevated temperatures, which can result in the loss of essential properties of the polymer.

(ii) Weathering: The process by which a polymer's structure and properties are altered as a result of exposure to the natural elements is referred to as weathering.

(c) Consequences of corrosion:

(i) Riveting a steel plate with copper rivets: When riveting a steel plate with copper rivets, galvanic corrosion is caused as a result of the contact between copper and steel. The steel will corrode more quickly than it would if it were in contact with a material that is less reactive than copper.

(ii) Connecting buried steel pipework to zinc plates: Connecting buried steel pipework to zinc plates can cause galvanic corrosion. Because zinc is more reactive than steel, the zinc plate corrodes and prevents the steel pipe from corroding. As a result, the zinc plate will corrode away, leaving the steel pipe vulnerable to corrosion.

(d) One-half of an electrochemical cell consists of a pure nickel electrode in a solution of Nid'ions, other half is a cadmium electrode immersed in a Cda solution. If the cell is a standard one:

(i) Spontaneous overall reaction: Ni(s) + Cd²⁺ (aq) → Cd(s) + Ni²⁺ (aq)

(ii) The voltage generated by the cell is: E°cell = E°cathode - E°anode

E°cell = E°Cd - E°Ni

E°cell = (-0.40) - (-0.25)

E°cell = -0.15V

Therefore, the voltage generated by the cell is -0.15V.

To know more about Corrosion, refer

https://brainly.com/question/1596056

#SPJ11

Answer:

The number of protons each element has.

Explanation:

The periodic table is arranged by atomic number, which is the number of protons in the nucleus of each element.

Answer:

The number of protons each element has.

Explanation:

The number of protons each element has is also known as the atomic number. Elements are arranged from left to right and top to bottom in order of increasing atomic number. The order generally coincides with increasing atomic mass. The rows are called periods.