When you walk at an average speed of 5km/h for 30 minutes, how far will you walk?

Answer:

C: remaining at rest

Explanation:

Acceleration (a) is the change in velocity (Δv), remaining at rest is not changing the velocity.

Answer:

Explanation:

3 N₂ (g)  + 2  O₃ (g)   →     6 NO (g)

Δ H(rxn ) = 90.37x 6 - ( 0 + 142.26 x 2 )

= 542.22  - 284.52

= 257.7 kJ

Δ S(rxn ) = 6 x 210.6 - ( 2 x 237.7 + 3 x 191.5 )

= 1263.6 - ( 475.4 + 574.5 )

= 213.7 J / K

Δ G = Δ H - T Δ S

= 257.7 - 350  x 213.7

= - 74537.3 kJ  .

Δ G / mole = - 74537.3 / 6 = - 12422.88 kJ / mol.

Answer:

true I just guessed of I'm being honest

Acid rain results when humans put excess amounts of sulfur dioxide (SO2) and nitrogen oxides (NOx) into the atmosphere.

These pollutants are released primarily from industrial processes and the burning of fossil fuels, which then react with water, oxygen, and other chemicals to form sulfuric acid and nitric acid. These acids then fall to the ground in the form of precipitation, known as acid rain.

Any type of precipitation that contains acidic elements, such as sulfuric or nitric acid, that falls to the ground from the atmosphere in wet or dry forms is referred to as acid rain, also known as acid deposition. This can apply to rain, snow, fog, hail, and even corrosive dust.

More on Acid rain: https://brainly.com/question/30271624

#SPJ11

Explanation:

for more inforamation you shall search

Answer:

Explanation:

Meter/ Second

Answer:

Meter/Second North!Brainliest pls :)

Explanation:

The cuvette contained distilled water when the student added the standard solution. This is most likely the cause of the error in the point the student drew with her 0.050 M Co2+(aq).

A spectrophotometer is a laboratory tool or instrument that is used to analyze a compound. This instrument belongs to the category of specific laboratory instruments, lined up with HPLC (High Performance Liquid Chromatography),  PSA  (Particle Size Analyzer) and Real Time PCR.

The spectrophotometer is actually a combination of two tools, namely:

A spectrometer is a tool that functions to produce light from a spectrum with a predetermined wavelength value, while a photometer is a tool to measure the intensity of light that is transmitted or absorbed.

Learn more about CoCl2 a thttps://brainly.com/question/17371958.

#SPJ4

35.0 g of C4H10O in 250.0 g of ethanol (C2H5OH) have the highest boiling point.

Organic substances include ethanol. With the chemical formula C2H6O, it is an alcohol. Its chemical formula can alternatively be expressed as CH3CH2OH or C2H5OH (an ethyl group linked to a hydroxyl group). A volatile, flammable, colourless liquid known as ethanol has a distinctive wine-like odour and bitter flavour.  It is a euphoric recreational substance that serves as the primary component of alcoholic beverages.Natural sources of ethanol include the fermentation of carbohydrates by yeasts or petrochemical processes like ethylene hydration. It has current medicinal uses as an antiseptic, disinfectant, solvent for certain drugs, and an antidote for methanol and ethylene glycol toxicity in addition to its historical usage as a general anaesthetic.

learn more about boiling point refer:brainly.com/question/24168079

#SPJ4

complete question:Which of the following solutions will have the highest boiling point? Input the appropriate letter.

A. 35.0 g of C2H6O2 in 250.0 g of ethanol (C2H5OH)

B. 35.0 g of C3H8O in 250.0 g of ethanol (C2H5OH)

C. 35.0 g of C4H10O in 250.0 g of ethanol (C2H5OH)

Answer:

Lithium,sodium, beryllium, aluminum form cations and the rest form anions

Explanation:

i think the question should be rephrased as 'which elements form cations".

Answer:

To find the number of moles of hydrogen produced from 10.0 moles of aluminum, you need to balance the equation for the reaction between aluminum and sulfuric acid.

Step 1: Balance the equation:

2Al + 3H2SO4 --> Al2(SO4)3+3H2

Step 2: Determine the stoichiometric ratio of moles of hydrogen produced per mole of aluminum:

From the balanced equation, 3 moles of hydrogen are produced for every 2 moles of aluminum.

Step 3: Calculate the number of moles of hydrogen produced:

If you start with 10.0 moles of aluminum, then the number of moles of hydrogen produced would be 3 * (10.0 moles of Al / 2 moles of Al) = 15 moles of hydrogen.

Answer:

c. 640.51

Explanation:

Given: 2.54 cm = 1 inch weighed 3.88 ounces

1 g = 0.035273 ounces

?   = 3.88 ounces

? = (3.88 x 1) / 0.035273

? = 109.999 = 110 g

110 g = 3.88 ounces

2.54 cm = 110 g

14.79 cm = ?

? = (14.79 x 110) / 2.54

? = 640.51 g

According to unit conversion, there are 640.51 g would a 14.79 cm length of same iron rod weigh.

Unit conversion is defined as a multi-step process which involves multiplication or a division operation by a numerical factor.The process of unit conversion requires selection of appropriate number of significant figures and the rounding off procedure.

It involves a conversion factor which is an expression for expressing the relationship between the two units.A conversion ratio always has value which equals to one which indicates that numerator and denominator have values which are expressed in different units.

Given: 2.54 cm = 1 inch weighed 3.88 ounces,1 g = 0.035273 ounces

x  = 3.88 ounces

x= (3.88 x 1) / 0.035273

x = 109.999 = 110 g

110 g = 3.88 ounces

Thus,2.54 cm = 110 g

14.79 cm = x

x= (14.79 x 110) / 2.54

x = 640.51 g

Learn more about unit conversion,here:

https://brainly.com/question/19420601

#SPJ7

Answer:

C

Explanation:

First of all KE is an energy that measures velocity, so the object has to be moving.

That lets out both A and D.  When the car is at it's highest it must stop so it can change direction. In both A and D, the car is getting ready to fall.  

B has some KE because the car is moving but it is not the answer.

The answer is C.  The car has turned all the PE it had at point A into KE

The answer then is C

Question B

The car is at a minimum when it is not moving. The velocity is 0. So that's at A and D. Both places have a velocity of 0.

Answer:

It is most of the time cheaper and more fresh than regular store bought food.

Explanation:

The reason why CaCl2 is used and not NaCl in the preparation of macrocapsules is due to the difference in solubility. Calcium chloride is a salt that is soluble in water, whereas sodium chloride is also soluble in water, but less so than calcium chloride.

A macrocapsule is a type of capsule that is large enough to be seen with the unaided eye. It is also known as a "large capsule." Macrocapsules are usually used in the medical industry to deliver drugs or other substances to specific parts of the body. The substance to be delivered is typically contained within the capsule, which is then implanted into the body.

In order to prepare macro-capsules, a process known as microencapsulation is used. During this process, the substance to be encapsulated is suspended in a solution, and then this solution is mixed with a polymer. The polymer hardens around the substance, creating a capsule that can be implanted into the body.

In the preparation of macro-capsules, CaCl2 is used instead of NaCl because of its solubility. Calcium chloride is highly soluble in water, which makes it ideal for use in the microencapsulation process. The solubility of CaCl2 allows for the formation of a hard, impermeable capsule that is able to protect the substance inside from the surrounding environment. On the other hand, NaCl is less soluble in water than CaCl2, which makes it unsuitable for the microencapsulation process.

Other factors which make CaCl2  suitable for macrocapsule preparation include:

Gel formation: CaCl2 can participate in gel formation reactions with certain polymers or gelling agents. It can crosslink polymers, resulting in the formation of a stable gel structure, which can be useful for encapsulating materials and providing mechanical stability to the macro-capsules.

Compatibility: The specific material being encapsulated or the application of the macrocapsules may require compatibility with CaCl2 rather than NaCl. For example, certain biological or chemical processes may be more compatible with CaCl2 as a component of the encapsulation system.

Learn more about solubility: https://brainly.com/question/24057916

#SPJ11

The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.

Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.

The balanced chemical equation for this synthesis reaction is:

Mg + Cl₂ ⇒ MgCl₂

Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.

Learn more about synthesis reactions:

brainly.com/question/16281119

Answer:

The last one

Explanation:

I have done this before

Answer:

Earth's plates moving & colliding against one another.

The fish are dying because the warm water from the manufacturing plant is causing the water's dissolved oxygen (DO) level to decrease. As the water is less able to hold the dissolved oxygen that fish and other aquatic animals need to survive.

When water gets warm, the solubility of gases, especially oxygen, decreases. The result is that warm water does not hold as much dissolved oxygen as cool water. This means that as the temperature of the water in the river increases, the amount of dissolved oxygen in the water decreases.

The oxygen level in the water is what has caused the fish to die in the river despite the absence of impurities (chemicals).

As water temperature increases, the solubility of gases decreases. This means that warmer water cannot hold as much dissolved oxygen as cooler water.

Fish and other aquatic creatures require oxygen to survive, therefore as the water temperature rises, the dissolved oxygen concentration in the water decreases.

As a result, the fish and other aquatic creatures are deprived of oxygen, causing them to perish.

Learn more about the solubility of gases here:

https://brainly.com/question/1326791

#SPJ11

Answer: they all are 4 properties of matter

Answer:

Explanation:

Mass is a scalar quantity. It has magnitude. In science, volume is a measure of the amount of three-dimensional space an object fills. It’s usually measured in cubic meters based on the SI or metric system. Volume can be represented by three axes – length, width, and height. In practice, however, volume in chemistry is commonly measured in liters and milliliters.  Magnetism is a force that attracts (pulls closer) or repels (pushes away) objects that have a magnetic material like iron inside them (magnetic objects). In simpler words, it is a property of substances which pull closer or repel other objects. It is a subject in physics.  The melting point of a substance is the temperature at which it changes state from solid to liquid.

Heat required : 4.8 kJ

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

The heat needed to raise the temperature

Q = m . c . Δt

1. heat to raise temperature from -20 °C to 0 °C

\(\tt Q=10\times 2.09\times (0-(-20)=418~J\)

2. phase change(ice to water)

\(\tt Q=10\times 333=3330~J\)

3. heat to raise temperature from 0 °C to 25 °C

\(\tt Q=10\times 4.18\times (25-0)=1045~J\)

\(\tt Q~tot=418+3330+1045=4793~J\rightarrow rounding~and~2~sig~figs=4.8~kJ\)

Chargaff's criteria, DNA from all cells of all creatures should include a 1 : 1 ratio of pyrimidine and purine bases.

According to Chargaff's criteria, DNA from all cells of all creatures should include a 1 : 1 ratio of pyrimidine and purine bases. More specifically, the amounts of guanine and adenine should be identical to each other in terms of their proportions to cytosine and thymine, respectively.

A and T and G and C bases in DNA are always equal in amount, according to this rule. (Adenine, Thymine, Guanine, and Cytosine make up the nucleotide triphosphates.) Erwin Chargaff (1905–2002), a renowned Austrian–American scientist who worked at Columbia University, is honored by having this rule bear his name.

The Chargaff's Rule was established by Erwin Chargaff and serves to illustrate the nitrogenous component of the DNA double helix. The DNA of every organism has an equal number of purines and pyrimidines, or a 1 : 1 ratio, according to this statement.

Therefore, the correct answer is option a. Chargaff's rule.

The complete question is:

DNA has equal number of adenine and thymine residues (A=T) and equal number of guanine and cytosine (G=C). These relationships are known as

a. Chargaff's rule

b. Coulomb's law

c. Le-Chatelier's Principle

d. Van't Hoff plot

To learn more about Chargaff's rules refer to:

https://brainly.com/question/20804844

#SPJ4

The scientific study of matter and the physical and chemical changes of matter is termed as chemistry.

Chemistry is a branch of science that focuses on understanding the composition, structure, properties, behavior, and transformations of substances. It seeks to explain and predict the interactions between different types of matter and the energy changes associated with these interactions.

Matter refers to anything that has mass and occupies space, including solids, liquids, gases, and even subatomic particles. Chemistry explores the fundamental building blocks of matter, such as atoms and molecules, and how they combine and rearrange to form different substances.

Physical changes in matter involve alterations in its physical properties, such as changes in state (solid, liquid, gas), temperature, pressure, or volume, without altering the chemical composition of the substance. Examples include boiling, melting, freezing, or changes in shape.

Chemical changes, on the other hand, involve the transformation of one or more substances into new substances with different chemical compositions and properties.

To know more about Physical changes here

https://brainly.com/question/19210143

#SPJ4

Answer:

cholera and salmonella

Explanation:

i believe so

No approximations or assumptions need to be made in the calculation of the pH and the tartrate ion 1C4H4O6 2-2 concentration for a 0.250 M solution of tartaric acid.

The pH and the tartrate ion 1C4H4O6 2-2 concentration of a 0.250 M solution of tartaric acid can be calculated using the acid-dissociation constants and the Henderson-Hasselbalch equation. The acid-dissociation constants (Ka1 and Ka2) of tartaric acid are 1.14x10-2 and 5.01x10-5, respectively.

The pH of the solution can be calculated using the Henderson-Hasselbalch equation: pH = pKa + log([base]/[acid]) where [base] is the concentration of the conjugate base (the tartrate ion) and [acid] is the concentration of the acid (tartaric acid). Since the solution is 0.250 M in tartaric acid, [acid] = 0.250 M and [base] = 0.250 M - [tartrate ion], which can be calculated using the Ka1 and Ka2 values.

For Ka1, the tartrate ion 1C4H4O6 2-2 concentration can be calculated as 0.250 M - 0.250 * 1.14x10-2 = 0.249 M. For Ka2, the tartrate ion 1C4H4O6 2-2 concentration can be calculated as 0.250 M - 0.250 * 5.01x10-5 = 0.249 M.

Using the Henderson-Hasselbalch equation, the pH of the solution can be calculated as pH = pKa + log([base]/[acid]). The pKa values of tartaric acid are 3.92 and 5.63 respectively. Therefore, for Ka1, the pH of the solution can be calculated as pH = 3.92 + log(0.249/0.250) = 3.91, and for Ka2, the pH of the solution can be calculated as pH = 5.63 + log(0.249/0.250) = 5.63.

No approximations or assumptions need to be made in the calculation of the pH and the tartrate ion 1C4H4O6 2-2 concentration for a 0.250 M solution of tartaric acid, as the Henderson-Hasselbalch equation and the acid-dissociation constants of tartaric acid can be used.

Learn more about Tartaric acid: brainly.com/question/24178503

#SPJ11

Answer:

The answer is Aluminum

Hope this helps you

The equilibrium constant for the reaction at a temperature of 32.45 Celsius is 5.71.

The equilibrium constant, denoted as Kc, is related to the Gibbs free energy change through the equation:

ΔG° = -RTlnKc

where ΔG° is the standard Gibbs free energy change for the reaction, R is the gas constant (8.314 J/mol•K), T is the temperature in Kelvin, and ln is the natural logarithm.

To find Kc, we first need to convert the temperature from Celsius to Kelvin:

T = 32.45 + 273.15 = 305.6 K

Next, we need to convert the Gibbs free energy change from kJ/mol to J/mol:

ΔG° = -16.32 × 1000 J/mol = -16,320 J/mol

Now we can plug in the values into the equation and solve for Kc:

-16,320 J/mol = -8.314 J/mol•K × 305.6 K × ln(Kc)

Solving for Kc, we get:

Kc = e^(-ΔG°/RT) = e^(-(-16,320)/(8.314 × 305.6)) = 5.71

Therefore, the equilibrium constant for the reaction at a temperature of 32.45 Celsius is 5.71.

To know more about Gibbs free energy, refer

https://brainly.com/question/9179942

#SPJ11

Answer:

heat

Explanation:

Among all the given options, the correct option is option A that is Light causes the same change to all materials. there are so many phenomenon that is attached to light.

Electromagnetic radiation that is visible to the human eye is referred to as light rays. The wavelengths of low energy radio waves, which are measured in meters, and high energy gamma rays, which have wavelengths smaller than 1x10-11 meters, are all included in the electromagnetic spectrum in its entirety.

The lowest unit of energy that is capable of moved is a photon, as well as the discovery because light can move in discrete quanta gave rise to quantum theory.

Therefore,  the correct option is option A.

To know more about light, here:

https://brainly.com/question/28246334

#SPJ1