Which of the following best describes temperature:

A: number of molecules
B:motion of molecules
C:size of molecules
D:type of molecules

Answer:

Heterotrophs

Explanation:

Heterotrophs are known as consumers because they consume producers or other consumers. Dogs, birds, fish, and humans are examples of heterotrophs. Heterotrophs occupy the second and third levels of the food chain, the chains of organisms that provide energy and nutrients to other organisms.

The mass in grams of sulfuric acid, H₂SO₄, that will be produced by the complete reaction of 40.01 grams of sulfur trioxide is 49.01 grams

We'll begin by obtaining the reacting mass from the balanced equation. This is shown below

SO₃(g) + H₂O(l) → H₂SO₄

From the balanced equation above,

80 g of SO₃ reacted to produce 98 g of H₂SO₄

Finally, we shall determine the mass of sulfuric acid, H₂SO₄ produced as illustrated below:

From the balanced equation above,

80 g of SO₃ reacted to produce 98 g of H₂SO₄

Therefore,

40.01 g of SO₃ will react to produce = (40.01 × 98) / 80 = 49.01 g of H₂SO₄

Thus, the mass of sulfuric acid, H₂SO₄ produced is 49.01 g

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The box for the following fusion equation 2 H + 2 H —> (2H₂) + energy

An critical fusion reaction for practical electricity generation is that between deuterium and tritium (the D-T fusion reaction). It produces helium (He) and a neutron (n) and is written D + T → He + n. To the left of the arrow (earlier than the response) there are  protons and 3 neutrons. The same is genuine on the proper.

Fusion guarantees a without a doubt endless shape of power that, in contrast to fossil fuels, emits 0 greenhouse gases and, not like the nuclear fission electricity used today, produces no lengthy-lifestyles radioactive waste.three.

Calculation:-

2 H + 2 H —> (2H₂) + energy

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The result of the Heat Transfer experiment is given as follows:  "The molecule was increased in kinetic energy but in a random structure." (Option B)

Heat transfer is a thermal engineering subject that deals with the creation, consumption, conversion, and exchange of thermal energy across physical systems.

Heat transmission is categorized into several methods, including thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts.

At 3 p.m., the water temperature is raised. The average kinetic energy of an item is related to its temperature. As a result, as temperature rises, so does average kinetic energy.

Kinetic energy is created by the random movement of molecules. Hence, the correct answer is "The molecule was increased in kinetic energy but in a random structure."

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Full Question:

A student investigated heat transfer using a bottle of water. The student placed the bottle in a room at  20.50C. The student measured the temperature of the water in the bottle at 7 a.m. and again at 3 p.m.  The data from the investigation are shown in the table below.

[See attached image]

Question:How would you describe the average kinetic energy of the water molecules in the bottle at 7 a.m. to  the average kinetic energy of the water molecules in the bottle at 3 p.m.

Following are reactant and product states and the  balanced chemical equation for the specified chemical reaction: NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)

How do you balance a chemical equation?

Step 1: In both reactants and products, count each kind of atom.

Check whether there is exactly the same amounts of each atom on either side of the arrow. Otherwise, the equation is unbalanced, and you must move on to step 2.

Step 2: To increase the amount of atoms or molecules in the substances, place coefficients in front of the symbols or formulas as necessary. Make use of the fewest coefficients you can.  Chemical formulations should never have their subscripts changed. The substances involved in the reaction can be altered by changing subscripts. Only modify the coefficients.

Till the equation is balanced, go back and repeat steps 1 and 2.

Following are reactant and product states and the  balanced chemical equation for the specified chemical reaction:

In the reaction between sodium hydroxide and hydrogen chloride, sodium chloride and water are produced.

Hence,

NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)

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Answer:

c. a reaction in which oxidation numbers change

Explanation:

In an oxidation reaction there is loss of electrons whereas in a reduction reaction there is gain of electrons. Therefore, a reaction in which oxidation numbers change identifies an oxidation-reduction reaction.

Answer:

C: a reaction in which oxidation numbers change.

Explanation:

24.2 g of Argon has 0.6057 moles in it.

We know that the number of moles in a given mass of an element can be calculated by using the formula

⇒ No. of moles = [tex]\frac{Mass of the element }{Molar mass of the element}[/tex]  (i)

Here, the mass of the element Argon = 24.2 grams (ii)

The molar mass of Argon is = 39.948 a.m.u. (iii)

Using the values for the molar mass and mass of the element (ii and iii), we get

⇒ [tex]\frac{24.2}{39.948}[/tex]

⇒ 0.6057 moles present in the given mass of Argon.

Therefore, there are going to be 0.6057 moles in 24.2 g of Argon which is given.

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Answer:

A.) 14.75 mol

Explanation:

To find the amount of moles, you need to use the Ideal Gas Law equation:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = number of moles

-----> R = Ideal Gas Constant (0.08206 L*atm/K*mol)

-----> T = temperature (K)

You can plug the given values and the constant into the equation and simplify to find "n".

P = 10 atm                    R = 0.08206 L*atm/K*mol

V = 27 L                       T = 223 K

n = ? moles

PV = nRT                                                                   <----- Ideal Gas Law

(10 atm)(27 L) = n(0.08206 L*atm/K*mol)(223 K)   <----- Insert variables

270 atm*L = n(18.299 L*atm/mol)                           <----- Mutliply

14.75 mol = n                                               <----- Divide both sides by 18.299

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Zinc is the element, that represents the given electronic configuration.

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.

In the given electron configuration [Ar]4s²3d¹⁰. Argon has 18 electrons. So, we have to add 12 electrons from s and d subshells to 18. The total number of electrons that we get on adding is 30. The element that corresponds to atomic number 30 is zinc that is Zn.

Therefore, Zinc is the element, that represents the given electronic configuration.

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The mass of the iron at 100°C is equal to 531.3 grams.

The specific heat capacity can be defined as the quantity of heat required to raise the temperature by one-degree Celcius in one unit of substance.

The energy is lost or absorbed will change the temperature of the substance, which can be shown as:

Q = mCΔT

Given, the initial temperature of the iron = 100°C

The initial temperature of water = 25 °C

The final temperature of both iron and water = 65°C

The specific heat capacity of the iron, C = 0.450 J/g°C

Water's specific heat capacity, C = 4.184 J/g°C

Heat lost by Iron (Fe) = Heat absorbed by water

- m × (0.450 J/g°C) × (65 - 100)°C =  50 × (4.184 J/g°C) × (65 - 25)°C

15.75 m = 8368

m = 531.3 g

Therefore, the mass of the iron is 531.3 grams.

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Answer:

the number of protons in the nucleus of an atom. the number of protons define the identity of an element

Answer:

1s2 2s2 2p4

Explanation:

X-rays and gamma rays have frequencies higher than microwaves but lower than UV radiation.

X-rays and gamma rays are both types of electromagnetic radiation. They are similar in that they are both invisible, travel at the speed of light, and can penetrate human tissue. They differ in their wavelength and energy. X-rays have a shorter wavelength and higher energy than gamma rays

Gamma rays are a type of electromagnetic radiation. They are the most energetic form of electromagnetic radiation. Gamma rays are produced by the most energetic events in the universe, such as supernova explosions and the merging of neutron stars.

X-rays are used in medicine and dentistry because they can penetrate the human body, which Gamma rays cannot.

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For any component: Proton count equals atomic number

Number of protons plus number of electrons equals the atomic number.

The number of neutrons is equal to the atomic number-mass number.

The quantity of protons in an element's atom is known as the atomic number. The atomic number of krypton in our illustration is 36. This indicates that the nucleus of a ruthenium atom contains 36 protons.

Every atom of ruthenium has 44 protons, which is intriguing. A Ruthenium atom cannot exist if it does not have 44 protons. A distinct element is produced by changing the number of protons in an atom's nucleus. An atom of rhodium is produced, for instance, by taking one proton away from a krypton atom.

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The order of boiling point from the highest to the lowest from the given compounds above are as follows:

CH3CH2CH2CH2CH2OH - CH3CH2CH2CH2CH2Br - CH3CH2CH2CH2CH3 - CH3CH2CH3.

The correct order is option b, d, c and a.

The boiling point of substances can simply be defined as that temperature at which liquids boils and then change to vapor or steam.

However, from the above given task, the organic compound, CH3CH2CH2CH2CH2OH has the same boiling simply because of its power to participate in hydrogen bond formation. This compound CH3CH2CH2CH2CH2OH is known as 1-pentanol.

So therefore, we can confirm that the compound from above the correct order of boiling point from the highest to the lowest is 1-pentanol, 1-bromopentane, pentane and propane respectively.

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Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The correct option is option A.

Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.

Out of given compound, a polymer of ethene that is polyethylene will have highest molar mass. Polymer is a long chain of same or different monomer unit. Polymer has higher mass than the individual compound.

Therefore, option A is correct.

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Answer: polyethylene, a polymer of ethene

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of chlorine gas =1 atm

V= volume of chlorine gas =18.5L

n =number of moles of chlorine gas

T =temperature of chlorine gas =298K

R = Gas constant = 0.0821 L.atm/K.mol

1 atm×18.5L= 0.0821×n×298K

1 atm×18.5L=n×24.4

n=0.75mol

mass of chlorine=0.75mol×35.453 g/mol

                          =26.55g

Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.

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The metal that absorbs the greatest amount of heat energy is lead.

Heat energy is the result of the movement of tiny particles called atoms, molecules  liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.

The equation that relates the specific heat capacity to the heat absorbed by the metal is given by:

q= m[tex]C_{p}[/tex]ΔT       where q = heat absorbed by the the metal, m = mass  of the metal, [tex]C_{p}[/tex] = heat capacity of the metal and ΔT is the change in temperature

In the above given question, the mass of the metal and change in the temperature is the same for all the metals. Therefore, we can determine the metal that will absorb the lowest amount of energy by using the specific heat capacity.

From the equation the heat absorbed by the metal (q) is directly proportional to the specific heat ([tex]C_{p}[/tex]). Hence we can see that lead has the highest specific heat capacity and therefor Lead absorbs the maximum amount of heat.

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In a case whereby A bath bomb is a solid sphere made of a weak base and a weak acid and you add it to a bathtub, it mixes with the water to create a soapy solution. If you want it to completely and quickly dissolve a large bath bomb, then  C. Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.

Solubility can be described as the maximum amount of a substance  which candissolve when subjected to given amount of solvent at a specified temperature.

It should be noted that the Solubility i serves as the characteristic property  that can be associated to a specific solute–solvent combination and there is a differing solubilities, hence from the case aboive when the tempertaure is been increased , this will  increases the solubility of the bath bomb .

Therefore, option C is correct.

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The equilibrium constant expression for the given reaction of methane with hydrogen sulfide will be:

[tex]k_c = \frac{[CS_2][H_2]^4}{[CH_4][H_2S]^2}[/tex]

Equilibrium constant expression is a ratio of the concentration of products to that of the concentration of the reactants. It is given by k[tex]_c[/tex].

In the given reaction, the product of the concentration of the reactants is

[tex]k_r[/tex] = [tex][CH_4] [H_2S]^2[/tex]

while the product of the concentration of the products is

[tex]k_p[/tex] = [tex][CS_2][/tex] [tex][H_2]^4[/tex]

According to the definition,

[tex]k_c = \frac{k_p}{k_r}[/tex]

[tex]\therefore k_c = \frac{[CS_2][H_2]^4}{[CH_4][H_2S]^2}[/tex]

Thus, the equilibrium constant expression is the ratio of the concentration of products and reactants.

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The reactants' concentration needs to be raised.

What factors influence rate of reaction?

The rate of the reaction controls how quickly the chemical reaction moves forward. The reaction's rate is influenced by a number of variables. These elements are:

(i) The concentration of the reactant: As the reactant concentration rises, the reaction rate does as well.

(ii) The reactant's nature. The condition, reactivity, or solution type of the reactants all have an impact on the reaction's pace.

(iii)The pressure of the gases: As the pressure of the gases involved in a reaction rises, so does its rate.

(iv) The surface area of the solids—As exposed surface area increases, so does the rate of reaction.

Therefore, if we to speed up the process, she should raise the reactant concentration since the more reactant molecules there are, the more molecules will actually collide, which will enhance the rate of the reaction.

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The difference between the molecules that have dipole forces and those that have London forces is that the molecules that have dipole forces are polar while those that have London forces are not.

We know that dipole forces are one of the kinds of intermolecular forces that exist. Let us note that a molecule is composed of the primary bond forces that hold the atoms of the molecule together and then the secondary bond forces that do hold the molecules together.

Now, the kind of interactions that exists between the molecules is the reason for the properties of the compound that we see. The molecules have not been shown here but I would discuss the properties of the London forces and the dipole forces.

Note that the molecules that do have the dipole forces have an electronegativity difference between the atoms of the molecule. The molecules that have the London forces are largely non polar.

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Since carbohydrates are essential biomolecules the action of sugars fluctuates when enzymes consume substrates of glucose molecules.

Gas pressure is the pressure created by the collision of gas particles with an object. Inside the balloon, gas particles collide with the inner wall of the balloon. It's these collisions that keep the balloon inflated. When carbon dioxide gas fills the balloon, it inflates. The more gas produced, the bigger the balloon will inflate.

The chemical reaction between baking soda and vinegar will inflate the balloon as long as the baking soda and vinegar react. Force Balance: The pressure inside the inflated balloon is greater than the pressure outside. The balloon is stable because the expansion force due to the pressure difference balances the contraction force due to the surface tension of the rubber.

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Answer:

13.89

Explanation:

13.89 moles (mole =mass)

Answer:

A

Explanation:

Independent variable: the surface of the slope rug, bubble wrap and wood

For this experiment, various solutions were compared to look for precipitation or bubbling. The precipitates or bubbles are the independent variable in the experiment. Therefore, option B is correct.

The term precipitation is defined as a solid produced by a change in a solution, often due to a chemical reaction or change in temperature that decreases solubility of a solid.

A substance separated from a solution or suspension by chemical or physical change, usually as an insoluble amorphous or crystalline solid.

A compound may precipitate when its concentration exceeds its solubility. This can be caused by temperature changes, solvent evaporation, or solvent mixing. A strongly supersaturated solution precipitates more quickly.

Independent variable are the surface of the slope rug, bubble wrap and wood.

Thus, option B is correct.

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Any object which have less density than the mercury will float in it and which have higher density will sink on it. Here, gold has higher density than  mercury. Thus it will sink on mercury.

Density of a substance is the measure of its mass per volume. Thus it says about how much denser the substance is in a specific volume. The ratio of density of an object to the density of  water is called specific gravity.

The density of mercury is 13.4 g/ml. Any object which is less dense than mercury will float on its surface whereas, objects which have higher density than mercury will sink on it.

The density of gold is 79.3 g/ml. All other given metals iron, lead and copper have a density less than that of mercury. Hence the substance which sink on mercury is gold. Option Dis correct.

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The given reaction is an exothermic reaction thus, heat is evolved in the reaction. Thus increasing temperature increases the rate of reverse or backward reaction. Increasing concentration of ozone and O will increase the rate of forward reaction.

According to collision theory, the rate of a reaction depends on the number of effective collisions of the reactants. The given reaction is the combination of ozone with oxygen to give oxygen molecule.

This reaction is exothermic, hence increasing the temperature will effect the equilibrium so as to consume the extra temperature reverse reaction will take place by which collision of O₂ molecules increases.

Similarly increasing the concentration of reactants O₃ and O will increase the rate of forward reaction. The enthalpy change is negative here indicating the reaction is exothermic, thus, increase the temperature and use of catalyst also decreases the activation energy ΔE.

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Answer:  They speed up and move farther apart.

Explanation:  With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates. The volume increases as they start moving apart from each other.

Explanation:

E=hv

6.626*10power of -34 * 587khz

2 NH3 + 3 CuO → 3 Cu + N₂ + H₂O in the equation the compounds that are on the left side were reactants and the compounds on the right side was products.

what is reactants and products?

Chemical reactions form and dissolve the chemical bonds that hold atoms together to form molecules. During a chemical reaction, the atoms are re organized; they become disengaged and reattached to one another in various ways, resulting in new compounds with diverse characteristics. Every chemical reaction has two parts:

Reactants – The beginning elements of a chemical reaction; what enters into the reaction

Usually written on the left side of a chemical reaction

Products — What is produced as a result of a chemical reaction.

Usually written on the right side of a chemical reaction.

among the given options the false statement was

H20 is a reactant was the false statement.

but the H2O was actually a product.

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