Is energy absorbed or released during cellular respiration?

Absorbed

Released​

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

limiting reagent is 02

mass of CO2 is 11g

Explanation:

the limiting reagent is the reagent which is consumed completely

no of mole of CH2 = m in g / molar mass

= 46.0/(12+2)

= 3.285 moles.

no of mole of O2 = 32/32

= 1 mole

from the reaction

1 mole of CH2 ==> 2 mol of O2

3.285 mol ==> 1/2 mol

3.285 mol ==> 0.5 mol

:. since O2 has the lowest mol , it's the limiting reagent

the limiting reagent mol will be used to find the no of mole of CH2

2 mol of O2==> 1 mol of CO2

0.5 mol ==> 0.5/2

0.25 mole of CO2

mass = 0.25 * ( 12+32)

= 11g

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Concentration of the reactants decreases over time as they are used up in the reaction. This means that there are fewer collisions between the reactant particles per unit time, leading to a decrease in the rate of reaction. Additionally, as the reaction progresses, the concentration of the product molecules increases, leading to an increase in the likelihood of the reverse reaction (i.e., CaCl2 + H2O + CO2 → CaCO3 + 2HCl) occurring. This also contributes to a decrease in the rate of the forward reaction over time.

Answer:

365 mL

Explanation:

There are 1,000 mL per every 1 L. As such, to convert between the two measurements, you need to multiply the given volume (0.365 L) by the conversion. To allow for the cancellation of units (liters), liters should be in the denominator of the conversion.

1,000 mL = 1 L

 0.365 L            1,000 mL
----------------  x  -----------------  = 365 mL
                               1 L

Answer:

volume

Explanation:

Answer: concetration

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question we have

\(density = \frac{57.3}{6.3} \\ = 9.095238...\)

We have the final answer as

Hope this helps you

The statement explains the treatments is,

Substance 1 was activated by a decrease in temperature, Substance 2 was activated by the change in concentration, and Substance 3 decreased the surface area.

So, the substance was heated and then placed in an ice bath is correct one.

So, first option is correct one.

The characteristics of substance are,

Example: Water present in solid state at low temperature, water also present in liquid ans gaseous state at moderate or high temperature.

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The false statement about light is:

e. all of the above statements are true.

The speed of light in a vacuum is constant at approximately 3 00 x 10 8 m/s

light does travel much faster than sound which has a speed of around 343 meters per second

a photon is a packet of light energy and the energy of a photon is proportional to its frequency the wavelength of light is

a characteristic feature that determines its color therefore statements a b c and d are true

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Answer: Earth's crust core contains a large amount of iron and nickel

Explanation:

The dynamo theory proposes a mechanism by which a celestial body such as Earth or a star generates a magnetic field. Earth's crust core contains a large amount of iron and nickel is evidence of the dynamo theory. Dynamo theory proposes a mechanism by which a celestial body such as the Earth or a star generates a magnetic field. The thesis describes how a rotating, convecting, and electrically conducting fluid can maintain a magnetic field over astronomical time scales. In this dynamo mechanism, fluid motion in Earth's outer core moves to execute material (liquid iron) across an already existing weak magnetic field and generates an electric current. (Heat from radioactive decay in the core is thought to induce convective motion.

the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

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0.01 mol/L is the molarity of given solution. 0.002 moles is added to 0.2 L solvent to make desired solution.

The amount of moles of solute found in a specific number of litres of the solution, or moles per litre of a solution, is known as molar concentration or molarity. Solutes are simply substances that can be found in solutions because a solution is defined as a homogenous mixture that comprises one or more solutes.

molar mass =342g /mol

number of moles=mass of solute / molar mass

0.45 /342 =0.002 moles

Volume solution =  50 mL / 1000 =0.2 L

M = n / V

M = 0.002 / 0.2

M = 0.01 mol/L

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La nomenclatura IUPAC tiende a eliminar las ambigüedades asociadas con la existencia de diferentes nombres para la misma estructura.

IUPAC, que implica que la Unión Internacional de Química Pura y Aplicada ha establecido reglas grupales para la denominación de compuestos. Este sistema de IUPAC tiende a eliminar las ambigüedades asociadas con la existencia de diferentes nombres para una misma estructura.

Los siguientes son los nombres de los compuestos;

a) 3,7 -dimetildecano

b) 2,4- dietil ciclopentano

c) 2-etil-3-propil-6-metilheptano

d) 2-etil propano

e) 2,4-dietil-5-metil ciclohexano

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Answer:

Mintu should chosen a material with a lower specific heat

Explanation:

I got the answer right on the test trust me it is correct

The given reaction has ΔG value  -12207KJ. Therefore, the given reaction is a spontaneous reaction as value of ΔG is negative.

A spontaneous process refers to anything that happens by itself, without external energy input. A ball is going to roll down an incline, water will flow downhill, ice will melt into water, radioactive elements will decay, and iron will rust, for instance. It is impossible for a reaction to not be spontaneous if it is exothermic (H negative) and increases the entropy for the system (S positive). The system's overall heat capacity is measured in enthalpy. The system's unpredictability is gauged by entropy.

ΔG=ΔH-T×ΔS

ΔG=11-298×41

     = -12207KJ

Since ΔG is negative, reaction is spontaneous

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

The molarity of a solution is calculated by the expression:

molarity= number of moles of solute÷ volume

Molarity is expressed in units moles/L.

In this case, you have:

Replacing in the definition of molarity:

molarity= 0.055 moles÷ 0.200 L

Solving:

molarity= 0.275 moles/L

Finally, 0.275 moles/L is the molarity of MgCl₂.

An electrolyte that completely dissociates in solution is known as a strong electrolyte. This means that the concentrationof MgCl₂ is equal to the concentration of the magnesium ion.

Finally, the molarity of the magnesium ion is 0.275 moles/L.

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Answer:

NaBr(s) → Na+ (aq) + Br– (aq)

Explanation:

Dissociation refers to the separation of an ionic compound or molecule into its constituent ions when dissolved in water. The ions with their respective charges make up the ionic compound, hence, an ionic compound is said to dissociate when the respective cations (+ charge) and anions (- charge) are released in an aqeous solution.

In this case, NaBr(s) or Sodium bromide is an ionic solid {signified by the (s) sign}. Upon dissolving in water, NaBr(s) breaks down into the ionic charges that makes it up i.e dissociates. The balanced ionic equation is as follows:

NaBr(s) → Na+ (aq) + Br– (aq)

Note: 1 mole of the solid ionic compound dissociates into one sodium ion (Na+) and one bromide ion (Br–).

The balanced dissociation equation for the compound, NaBr is:

NaBr(s) —> Na⁺(aq) + Br¯(aq)

NOTE:

Dissociation will only occurs when the compound is dissolved in water

The dissociation equation for NaBr can be written as follow:

From the equation above, we can see that the ions that makes up NaBr are clearly seen. Hence, the above equation is the dissociation equation for NaBr.

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Answer:

B)11

Explanation:

The atomic number is the number of protons and electrons in an atom!!

HOPE THIS HELPS!!!!!!

Answer:

A substance is considered a chemically pure substance when it has a fixed chemical composition throughout, and uniform physical and chemical properties. Because isopropyl alcohol ( C3H8O ) Is a homogenous compound with constant physical and chemical properties, as well as a uniform chemical structure, isopropyl alcohol is definitely fit to be considered a pure substance.

Answer:

46.08 g of O2

Explanation:

The balanced chemical equation for the reaction shows that 1 mol of O2 reacts with 2 mol of Mg to form 2 mol of MgO.

Therefore, to calculate the mass of O2 that reacts with 2.88 mol of Mg, we need to use the mole ratio between Mg and O2.

Mole ratio of Mg to O2 is 2:1, meaning that for every 2 moles of Mg, 1 mole of O2 reacts.

So, for 2.88 mol of Mg, we need 1.44 mol of O2 (2.88 mol Mg x 1 mol O2 / 2 mol Mg).

The molar mass of O2 is 32 g/mol.

Therefore, the mass of O2 needed is:

mass = number of moles x molar mass = 1.44 mol x 32 g/mol = 46.08 g.

Therefore, 46.08 g of O2 is needed to react with 2.88 mol of Mg.

Answer:

It would most likely just change their color

Explanation: The frequency of dark-coloured moths increased at that time, an example of industrial melanism. Later, when pollution was reduced, the light-coloured form again predominated. ... The dark-coloured or melanic form of the peppered moth

If pollution near factories was reduced, then this situation increased the frequency of white moths.

Industrial melanism is an evolutionary feature associated with the increase of dark moths in industrial polluted areas.

In conclusion, if pollution near factories was reduced, then this situation increased the frequency of white moths.

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The concentration of the HCl solution needed to neutralise NaOH is 0.0432M

Neutralization is a chemical reaction in which acid and base react to form salt and water. Hydrogen (H⁺) ions and hydroxide (OH⁻ ions) react with each other to form water.

The strong acid and strong base neutralization have a pH value of 7.

The beaker gets warm which indicates that the reaction between acid and base is an exothermic reaction releasing heat energy into the surroundings.

Given,

Volume of NaOH = 54ml

Concentration of NaOH = 0.1 M

Volume of HCl = 125ml

Concentration of NaOH × Volume of NaOH = Concentration of HCl × volume of HCl

0.1 × 0.054 = Concentration of HCl × 0.125

Concentration of HCl = 0.0432 M

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Weight is best defined as the force of gravity on an object (option C).

Weight is the force on an object due to the gravitational attraction between it and the Earth (or whatever astronomical object it is primarily influenced by).

Weight is different from mass being that weight is a dependent on the gravitational force of the object's habitation, however, mass is not.

For example, the mass of an object on Earth can be 10kg, however, the weight of the object is 100N because the gravitational force of the Earth is 10m/s².

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Considering the reaction stoichiometry and the definition of limiting reagent, the mass of NaNO₃ that is produced when 25.0 grams of lead (II) nitrate react with 15.0 grams of sodium iodide is 8.50 grams.

The balanced reaction is:

Pb(NO₃)₂ + 2 Nal → PbI₂ + 2 NaNO₃

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 present in the reaction is:

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

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 331 grams of Pb(NO₃)₂ reacts with 299.8 grams of NaI, 25 grams of Pb(NO₃)₂ reacts with how much mass of NaI?

\(mass of NaI=\frac{25 grams of Pb(NO_{3} )_{2} x299.8 grams of NaI}{331 grams of Pb(NO_{3} )_{2} }\)

mass of NaI= 22.64 grams

But 22.64 grams of NaI are not available, 15 grams are available. Since you have less mass than you need to react with 25 grams of Pb(NO₃)₂, NaI will be the limiting reagent.

Then, it is possible to determine the mass of NaNO₃ produced by another rule of three, taking into account the limiting reagent: if by stoichiometry 299.8 grams of NaI produce 170 grams of NaNO₃, 15 grams of NaI how much mass of NaNO₃ will be formed?

\(mass of NaNO_{3} =\frac{15 grams of NaIx170 grams of NaNO_{3}}{299.8 grams of NaI}\)

mass of NaNO₃= 8.50 grams

In summary, the mass of NaNO₃ that is produced when 25.0 grams of lead (II) nitrate react with 15.0 grams of sodium iodide is 8.50 grams.

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The medicine that has to be given by the nurse to prevent cerebral palsy in the new-born is magnesium sulphate.

The term "cerebral palsy" refers to a collection of conditions that impair mobility and posture development and are thought to be caused by non-progressive abnormalities. Insults that caused cerebral palsy are thought to have happened during foetal development or early childhood. A significant risk factor for cerebral palsy is preterm delivery, and that risk rises sharply as gestational age decreases. Right now, 25% of all new occurrences of cerebral palsy are caused by babies delivered before 34 weeks of pregnancy. Cerebral palsy risk is higher when there are several pregnancies. MgSO4 was infused continuously at a rate of 2 g/h for up to 12 hours after a 6 g loading dose. Given before delivery, magnesium sulphate is known to regulate the vasculature and minimize hypoxia effects by neutralising cytokine or excitatory amino acid damage, which may lower the risk.

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Answer:

To live in the White House

Explanation:

While George Washington was in office, the white house was still in the stages of being built. Hence John Adams was the first president to reside and live in the White house.

Answer:

It's B to live in the white house.

Explanation:

Ahmed walks 3 km north then turns east and walks 4 Km. The total distance he walks is 7 km.

What is the total distance and displacement?

For the first part of the question, in order to calculate the distance traveled, all we have to do is add the total kilometres Ahmed has walked. So,

Total distance = 3 Km + 4 Km = 7 Km

Therefore, the total distance traveled by Ahmed is 7 Km.

Now, in order to calculate the displacement, we have to consider the shortest distance travelled by Ahmed.

The figure attached represents the shortest distance as X.

So, by using the Pythagoras theorem, we can look for the value of X.

3² + 4² = X²

9 + 16 = X²

25 = X²

X = 5

Therefore, the Displacement of Ahmed is 5 Km.

Therefore the total distance traveled by Ahmed is 7 km and total displacement is 5 km.

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Answer:

I would say all of the above

Explanation:

I say this because we use material and energy, we grow and develop, we are made up of cells, and we respond to the environment.

Potential energy is stored energy that is affected by the relative location of different components of a system. When a spring is squeezed or expanded, its potential energy increases.

Potential energy is the energy retained by an object as a result of its location relative to other objects, internal stresses, electric charge, or other variables.  Although it has ties to the ancient Greek scholar Aristotle's idea of potentiality, the word potential energy was coined by the 19th-century Scottish engineer and physicist William Rankine.

The gravitational potential energy of an object, the elastic potential energy of a stretched spring, and the electric potential energy of an electric charge in an electric field are all examples of common kinds of potential energy. The joule, denoted by the sign J, is the measure of energy in the International System of Units (SI).

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Answer:

D got it right

Explanation:

Answer:

The answer is d

Explanation:

God bless you have a great day