Determine if the process is EXOTHERMIC or ENDOTHERMIC:

Cellular respiration - a type of combustion reaction that produces ATP, CO2, and H2O.


exothermic


endothermic

zn + 2 AgCI-> ZnCI2+ 2Ag

2 FeCI3+ 3 H2s->___FeCI2+ 6 HCI+___s

2 Ag2O-> 4 Ag+ O2

4AI2O3-> 3 AI+ 2O2

2 K+ 2H2O-> 2 KOH+ H2

Caco3-> CaO+ CO2

2 MG+ O2-> 2MgO

CO+ 3 Fe2O3-> 2 Fe+ 3CO2

2 H2+ 3 Fe2O3-> Fe+ 3H2O

HCI+ 2 ZN-> H2+ ZnCI2

enintlchemicalaidcom

Your answer is A. What is the composition of air?

The question that can be answered by science is What is the composition of air? The correct option is A.

Science is a subject that deals with the components of the earth. It has a wide variety of components of earth. Like planets and meteorites. Plants, animals, and other creatures. Nature, trees, and other abiotic factors.

Science gives answers to the secrets of the earth, and they unravel the mysteries of nature and the earth. They solve the mysteries of air, water, and other natural processes.

So the composition of air can be told by science. The air is made up of a mixture of gases. Air is present in the atmosphere. It is needed for breathing, and it is an important component of life because it provides oxygen to the body.

The correct option is A. What is the composition of air?

To learn more about science, refer to the below link:

https://brainly.com/question/12842883

#SPJ5

The mass of product when 1.201 g of charcoal reacts with 6.414 g of powdered sulfur is 7.60 g.

To find the mass of product, we need to first calculate the limiting reactant. We do this by finding the number of moles of each reactant using their respective molar masses.

Molar mass of charcoal (C): 12.01 g/mol
Molar mass of sulfur (S): 32.06 g/mol

Number of moles of charcoal = 1.201 g / 12.01 g/mol = 0.0999 mol
Number of moles of sulfur = 6.414 g / 32.06 g/mol = 0.2002 mol

According to the balanced chemical equation, the reaction requires 1 mole of charcoal and 2 moles of sulfur to produce 1 mole of CS₂. Since there are not enough moles of charcoal to react with all the sulfur, charcoal is the limiting reactant.

The number of moles of CS₂ produced is equal to the number of moles of charcoal used (0.0999 mol). To find the mass of CS₂ produced, we use its molar mass:

Molar mass of CS₂: 76.14 g/mol

Mass of CS₂ produced = number of moles of CS₂ x molar mass of CS₂
Mass of CS₂ produced = 0.0999 mol x 76.14 g/mol = 7.60 g

Therefore, the mass of CS₂ produced is 7.60 g.

Learn more about limiting reactant here: https://brainly.com/question/26905271

#SPJ11

Answer:

The elements of the same group have the same number of valence electrons, that is why they have similar properties

Answer:

The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information. Nucleoli are small bodies often seen within the nucleus. The gel-like matrix in which the nuclear components are suspended is the nucleoplasm.

Conjugate bases are defined as the molecules or ions that remain after acids donate a proton. Conjugate base strength is determined by the strength of the parent acid. As a result, strong acids generate weak conjugate bases, while weak acids generate strong conjugate bases.

The correct option is b. HClO_4.HClO4 is the strongest acid since it has the highest Ka. Because the conjugate base of HClO4 is ClO4, which is quite stable and can handle negative charges better than the others, it is the strongest conjugate base. HClO4 is the strongest acid among the options provided because it has the highest Ka. The conjugate base of HClO4 is ClO4, which is a very stable base because it can manage the negative charge better than any other options provided.

Learn more about Conjugate bases here ;

https://brainly.com/question/30086613

#SPJ11

Each isotope's relative importance is indicated by its percent abundance. Element X has an average relative atomic mass of 220.4.

Compare the provided isotopes to the weighted average on the periodic table to identify the isotopic form of an element that is the most prevalent. The three hydrogen isotopes, for instance, are H-1, H-2, and H-3. Around 1.008 amu is the weighted average of hydrogen's atomic mass ( look again at the periodic table).

This details are not provided here. Therefore, we shall use the protons' number as the atomic number. The correct response is therefore 17.

To know more about isotopes visit:-

https://brainly.com/question/12955625

#SPJ4

Answer:

The label may instruct you to shake a liquid medicine before using so that the active ingredients are evenly distributed throughout it.

Explanation:

Answer:

maybe because if somehow the liquids get separated then shaking them up would mix them back to how they are suppose to be originally.

Explanation:

Answer:

C. 1

Explanation:

Group 1 metals are highly reactive (such as Sodium) and form 1 to 1 ratio of ions with halogens (such as chlorine, bromine etc).

This happens because group 1 element can donate 1 valence electron to fulfill their octet rule and halogens can receive 1 valence electron to fulfill their octet.

The average energy needed to remove a nucleon from a nucleus is known as the average binding energy per nucleon. This value represents the average amount of energy required to separate a nucleon from its nucleus.

The average binding energy per nucleon can vary depending on the specific nucleus being considered. However, on average, the binding energy per nucleon is around 8 to 9 million electron volts (MeV). This means that, on average, it takes approximately 8 to 9 MeV of energy to remove a nucleon from a nucleus.

The binding energy per nucleon is an important concept in nuclear physics as it provides insight into the stability and structure of atomic nuclei. Nuclei with higher average binding energy per nucleon are more tightly bound and tend to be more stable. This is evident in the phenomenon of nuclear fusion, where lighter nuclei combine to form heavier nuclei, releasing energy due to the increase in binding energy per nucleon. Conversely, in nuclear fission, heavier nuclei split into smaller fragments, releasing energy due to the increase in average binding energy per nucleon for the resulting nuclei.

To learn more about binding energy per nucleon brainly.com/question/10095561

#SPJ11

The average energy needed to remove a nucleon from a nucleus is represented by the average binding energy per nucleon, with an approximate value of 8 MeV for stable nuclei.

What is average binding energy?

The average energy needed to remove a nucleon from a nucleus is known as the average binding energy per nucleon. It represents the average energy required to separate a nucleon from the nucleus.

The average binding energy per nucleon can vary depending on the specific nucleus being considered. On average, larger nuclei tend to have lower binding energies per nucleon compared to smaller nuclei. This is because the strong nuclear force, which binds nucleons together, becomes less effective in larger nuclei due to the increasing electrostatic repulsion between protons.

As an approximate value, the average binding energy per nucleon for stable nuclei is around 8 MeV (million electron volts). This means that, on average, it takes approximately 8 MeV of energy to remove a nucleon from a nucleus.

It's important to note that the binding energy per nucleon can vary for different isotopes and isotones of a particular element and can deviate from the average value. Additionally, the specific process of removing a nucleon can involve different energy requirements depending on whether it is a proton or a neutron being removed.

Overall, the average energy needed to remove a nucleon from a nucleus is represented by the average binding energy per nucleon, with an approximate value of 8 MeV for stable nuclei.

To know moere about binding energy, refer here:

https://brainly.com/question/31748572?referrer=searchResults

#SPJ4

Answer:

fewer peaches will be sold

Explanation:

if the price increases less people will want to buy it, but the orchards would still get money so they wouldnt be affected

Answer:

fewer peaches

Explanation:

Answer: 1.354 g/mL . The problem provides us with the mass of the empty flask (99.895 g) and the mass of the flask with the solution (126.975 g).

To determine the mass of the solution, we subtract the mass of the empty flask from the mass of the flask with the solution:

Mass of the solution = mass of flask with solution - mass of empty flask

= 126.975 g - 99.895 g

= 27.080 g

Next, we use the volume of the flask (20.0 ml) as the volume of the solution since the unknown substance was added to fill the flask to the mark and water was added to dissolve it to a total volume of 20.0 ml.

Finally, we calculate the density of the solution using the formula:

Density of the solution = mass of solution / volume of solution

Plugging in the values we found, we get:

Density of the solution = 27.080 g / 20.0 ml

= 1.354 g/mL

Therefore, the density of the solution is 1.354 g/mL.

To learn more about mass refer to this link

https://brainly.com/question/11954533

#SPJ4

The most important variable to control in this experiment the type of bicycle tyre.

An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.

According to this question, Dan and Dawn wants to know if there is any difference between the mileage expected from bicycle tires from two different manufacturers.

Dan, then, conduct an experiment by putting one brand on his bike and Dawn will put the other brand on her bike.

In this experiment, the independent variable is the different mileage from different manufacturers. This means that to make this experiment a controlled one, all other variables must be kept constant.

Therefore, the most important variable to control in this experiment the type of bicycle tyre because Dan and Dawn must ensure that they use the same type of bicycle tyre.

Learn more about experiments at: https://brainly.com/question/11256472

#SPJ1

Explanation:

You will need the specific heat of Mg which I found to be 1.02 J / (g C)

m * 45 C  * 1.02 J . (g C) = 843

m = 843 / (45* 1.02) = 18.4 g  of Magnesium

Answer:

the second one looks balanced but I could be wrong

Answer:

I beleive its C

Explanation:

The ability for a substance to flow is fluidity.

Only liquid and gaseous substances have the ability to flow from one point to other as they have weak intermolecular force in it.

Fluidity is the quantity which gives idea about the ability of that substance to flow. At normal conditions at room temperature, any substance has the tendency to distort its shape in order to flow or take the shape of the container it is enclosed in.

Hence the ability for a substance to flow is fluidity.

To know more about fluidity, visit the below link:

https://brainly.in/question/466917

#SPJ2

Most of water's unique features (for example, its versatility as a solvent, ability to moderate temperature, and cohesive behavior) result from the fact that it is a polar molecule.

This means that water has a partial positive charge on one end and a partial negative charge on the other, allowing it to form hydrogen bonds with other polar molecules and creating properties such as surface tension, high heat capacity, and the ability to dissolve a wide range of substances.

such as its versatility as a solvent, ability to moderate temperature, and cohesive behavior, result from the fact that water molecules form hydrogen bonds with each other. These hydrogen bonds give water its unique properties and make it essential for life on Earth.

learn more about polar molecule here

https://brainly.com/question/1433127

#SPJ11

Answer:

40 grams

Explanation:

Their respective atomic weights are: Na - 23,0 - 16 and H - 1, so the molecular weight, is 23 + 16 + I = 40. Thus 40 grams of NaOH equals one mole of NaOH, and a 1 molar solution of NaOH will contain 40 grams of NaOH chemical.

Answer:

Explanation:

Nitrate of most of the elements are water soluble . Aluminium nitrate is also one of them . Aluminium nitrate is easily dissolved in water . It forms hydrated salt whose formula is as follows

Al( NO₃ )₃ . 9H₂O

It is a white crystalline salt . It is also soluble in alcohol.

Answer:

what are the gas samples

Stearic acid molecules, which are composed of long chains of carbon and hydrogen atoms with a carboxylic acid group at one end, do not exist as perfect rectangular prisms in reality.

While it is true that the molecules can form long, straight chains and pack together in a relatively ordered fashion in some cases, the actual shape of the molecules and the way they pack together can be more complex due to factors such as:

Conformational isomers: The carbon chains in stearic acid molecules can adopt different conformations, such as gauche and transforms, which can affect the shape of the molecule and how it interacts with other molecules.

Intermolecular forces: Stearic acid molecules can interact with each other through various intermolecular forces, such as van der Waals forces, hydrogen bonding, and dipole-dipole interactions. These forces can influence the shape of the molecules and the way they pack together.

To know more about stearic acid refer to:

brainly.com/question/30054115

#SPJ4

Answer:

One reaction that can be used to show the difference between a weak acid and a strong acid is the reaction with magnesium. When magnesium is added to hydrochloric acid, a vigorous reaction occurs, releasing hydrogen gas and forming magnesium chloride:

2HCl(aq) + Mg(s) → MgCl2(aq) + H2(g)

In contrast, when magnesium is added to ethanoic acid, a slow reaction occurs, releasing hydrogen gas and forming magnesium ethanoate:

2CH3COOH(aq) + Mg(s) → Mg(CH3COO)2(aq) + H2(g)

The reason for the difference in reaction rate between the two acids is due to their different levels of dissociation in water. Hydrochloric acid is a strong acid and completely dissociates in water, releasing a high concentration of hydrogen ions (H+) in solution. In contrast, ethanoic acid is a weak acid and only partially dissociates in water, releasing a low concentration of hydrogen ions in solution. As a result, the reaction between magnesium and hydrochloric acid is more vigorous because of the high concentration of hydrogen ions in solution, whereas the reaction between magnesium and ethanoic acid is slower due to the lower concentration of hydrogen ions in solution.

Explanation:

Answer:

correct comparative pH, such as, 0-3 (strong) 4-6 (weak) • named reaction, such as, with a reactive metal or a named carbonate • comparative results or observations of the named reaction, such as, faster reaction (strong) or greater volume of gas produced in a given time (strong) 

Explanation:

Explanations of different results • weak acids are only partially ionised in aqueous solution • strong acids are completely ionised in aqueous solution/ greater concentration of H+ ions • aqueous solutions of acids at the same concentration/ powder, same temperature

Answer:

Heuristics are the "shortcuts" that humans use to reduce task complexity in judgment and choice, and biases are the resulting gaps between normative behavior and the heuristically determined behavior (Kahneman et al., 1982).

The availability heuristic works by prioritizing infrequent events based on recency and vividness. For example, plane crashes can make people afraid of flying. However, the likelihood of dying in a car accident is far higher than dying as a passenger on an airplane.

The three heuristics that received most attention were availability, representativeness, and anchoring and adjustment. The availability heuristic refers to the tendency to assess the probability of an event based on the ease with which instances of that event come to mind.

Heuristics are mental shortcuts that allow people to solve problems and make judgments quickly and efficiently. These rule-of-thumb strategies shorten decision-making time and allow people to function without constantly stopping to think about their next course of action.

While the deodorant example is obviously simple, biases and heuristics play a role in almost all decisions we make. Choices about who to hire, how to invest in the stock market, and when to seek medical care when something ails us are examples of more important decisions that are all influenced by biases and heuristics.

Biases can occur due to various reasons, with the most common causes being: Heuristics. These are biases that are caused by our use of mental shortcuts. Limited cognitive capacity. These are biases that are caused by our limited cognitive capacity. Noisy information processing.

Heuristics help make life easier and allow us to make quick decisions that are usually pretty accurate. Being aware of how these heuristics work as well as the potential biases they introduce might help you make better and more accurate decisions.

Another cognitive bias that has its roots in the availability heuristic is known as the optimism bias. Essentially, we tend to be too optimistic for our own good. We overestimate the likelihood that good things will happen to us while underestimating the probability that negative events will impact our lives.

Explanation:

Answer:

protons

Explanation:

hjejdjkdndknfodjdodjbdld

The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.

To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:

51.8 kJ + H₂(g) + I₂(g) → 2HI(g)

We need to consider the number of moles of gas on each side of the reaction.

On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.

Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.

For more details regarding the number of moles, visit:

https://brainly.com/question/20370047

#SPJ1