The most reactive metal groups on the periodic table are...
Groups I & II
Groups II & III
Groups VI & VIII
Group VII & VIII

The result if heat is added to an endothermic reaction is that it will increasing the amounts of the products and will decreasing the amounts of the reactants.

If the reaction is the endothermic reaction and if we add the heat to the endothermic reaction then it will  increase in the temperature and it will cause the forward reaction to occur, and increasing the amounts of the products and will decreasing the amounts of the reactants. The Lowering of the temperature will be produce the opposite of the response.

Thus, the increase in the amount of the product occurs if we add the heat to the endothermic reaction.

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i don't really know what you are trying to say here, but what i think you are saying is what sounds like a more impressive job?? in my opinion, pseudoscience sounds more fancy and interesting. Since not a lot of people really knows what that is, it sparks conversation.

Answer:

https://brainly.in/question/5343031 use this link

Explanation:

According to the question;

A student takes notes in class as shown below. A. Uses an objective process Is updated constantly B. Is not objective Does not use a process Resists new information.

So the best titles for circumstances A and B will be :

Option C ;

A) characteristics of science because of the scientific methods used for notes taking

B) limitations of science because of the non scientific method or Science resistive methods used for notes taking

Absolute zero is an idea in thermodynamics that describes the lowest energy system.

Thermodynamics

Thermodynamics is the study of thermal energy and heat. One of the most important ideas in thermodynamics is entropy. Entropy is defined as the chaos within a system. Chaos is the movement or different orientations of molecules in a system. Entropy is related to temperature; the higher the temperature, the higher the entropy. High entropy means there is a large amount of chaos in a system, while low entropy is low chaos.

Absolute zero

Absolute zero occurs when the temperature of a system is 0 kelvin or -273.15 °C. Zero kelvin is the theoretical temperature in which entropy equals 0. This means that there is no movement or energy within a system. Absolute zero is the lowest energy a system can possibly have.

In order for a solute to dissolve in water the solute particles must be strongly attracted to water molecules.

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Answer:

CO2

Explanation:

(I Just took the test)

At STP 1 mol=22.4 Liters, so we now know that it is asking for which of the gasses has a molar mass of 44, and CO2 is th only one with that molar mass

The need to use stoichiometry and the concept of limiting reagents. When excess Na2CrO4 is added to AgNO3, it forms an insoluble solid Ag2CrO4. The balanced chemical equation for this reaction is 2AgNO3 + Na2CrO4 → Ag2CrO4(s) + 2NaNO3.

The mass of Ag2CrO4 produced is 0.670 grams. Using the molar mass of Ag2CrO4 (331.73 g/mol), we can calculate the number of moles of Ag2CrO4. 0.670 g Ag2CrO4 x (1 mol Ag2CrO4/ 331.73 g Ag2CrO4) = 0.00202 mol Ag2CrO4
Since the reaction is a 1:1 stoichiometric ratio between Ag2CrO4 and AgNO3, we know that the number of moles of AgNO3 present in the original solution is also 0.00202 mol. We can calculate the molarity of the AgNO3 solution by dividing the number of moles by the volume of the solution in liters Molarity = moles of solute / volume of solution (in liters) The volume of the solution is given as 51.0 mL or 0.0510 L. Therefore Molarity = 0.00202 mol / 0.0510 L = 0.0396 M Therefore, the molarity of the AgNO3 solution is 0.0396 M. In summary, we can determine the molarity of a solution of AgNO3 by adding excess Na2CrO4 and allowing the formation of an insoluble solid, Ag2CrO4. We can then use stoichiometry to calculate the number of moles of AgNO3 and use that to calculate the molarity of the solution.

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The temperature of 0.43 mol of xe gas contained in a 2.65 l container is 2.79 K.

An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.

Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.

An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect on the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable

Using the ideal gas equation:-

Given;

PV = nRT

T = PV/nR

    = 3.77 ×  2.65 / 0.43 × 8.314

    = 2.79 K

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Answer:

The first answer is wrong, it's actually Potassium.

Explanation:

Just saying

There are a total of 8 bonding electrons in a molecule of formaldehyde.

In a molecule of formaldehyde (H2CO), the Lewis structure can be represented as follows:

H H

\ /

C=O

/

H O

The total number of bonding electrons in formaldehyde can be calculated by adding the number of electrons involved in all of the bonds in the molecule. In this case, there are two C-H bonds, one C-O double bond, and two lone pairs of electrons on the oxygen atom. Each covalent bond involves two electrons, so the total number of bonding electrons in formaldehyde can be calculated as follows:

2 (C-H bonds) x 2 electrons/bond = 4 electrons

1 (C-O double bond) x 4 electrons/bond = 4 electrons

Total = 8 electrons

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The final volume of the 5.00 L of ethane gas when the temperature is changed from 298 K to 404 K and the pressure remains constant is 6.80 L.

The final volume of the 5.00 L of ethane gas when the temperature is changed from 298 K to 404 K and the pressure remains constant can be calculated using the ideal gas law:

V2 = V1 (T2/T1)n/R

Where:

V2 = final volume (in L)

V1 = initial volume (in L)

T2 = final temperature (in K)

T1 = initial temperature (in K)

n = number of moles of gas

R = universal gas constant (8.314 J/mol K)

Given that V1 = 5.00 L, T1 = 298 K, T2 = 404 K, and R = 8.314 J/mol K, the final volume of the ethane gas can be calculated as follows:

V2 = 5.00 L (404 K/298 K)n/8.314

V2 = 5.00 L x 1.36 = 6.80 L

Therefore, the final volume of the 5.00 L of ethane gas when the temperature is changed from 298 K to 404 K and the pressure remains constant is 6.80 L.

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Answer:

The US surgeon general's 1964 report declared that smoking cigarettes was linked to cancer .

The average global temperature of the Earth has increased by almost two degrees in the last century.

Explanation:

Science and pseudoscience differs in terms of scientific methods involved in any study. Science deals with the practices and beliefs that undergo a method of scientific study. Pseudoscience is the term associated with the ideas and beliefs that tend to be scientific in nature but they fail in their execution of following the scientific methods.  

From the given options, two of them are the examples of science and not pseudoscience.

A 5.00 l container is filled with 0.300 atm acetylene and 0.800 atm hydrogen, which react according to: C2H2(g) + 2 H2(g) C2H6

what is a reaction?

A chemical reaction occurs when two or more molecules collide with the right orientation and enough force to produce a new product. Atomic bonds are created and disrupted throughout this process. Products, as opposed to reactants, are the compounds that result from an interaction between two other substances.

Substances are made up of chemical components or chemical elements. The atoms that make up the reactants in a chemical reaction are rearranged to create different products. A essential aspect of life itself, as well as technology and civilization, are chemical reactions.

0.300 atm acetylene and 0.800 atm hydrogen are placed in a 5.00 l container, where they react as follows: C2H2(g) + 2 H2(g) C2H6.

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(a) Brass is a metal alloy made primarily of copper and zinc, with varying proportions of other elements such as lead, tin, or aluminum. It is a commonly used material due to its durability, malleability, and corrosion resistance.

Brass is often used in the manufacture of musical instruments, plumbing fixtures, electrical components, and decorative objects.

(b) Magnesium oxide (MgO) is a ceramic material that is formed by the reaction of magnesium and oxygen. It is a white, odorless, and non-toxic compound with high thermal stability, making it useful in high-temperature applications. MgO is commonly used in the production of refractory bricks, insulation materials, and electrical components.

(c) Plexiglass is a polymer material that is commonly used as a substitute for glass due to its high transparency and impact resistance. It is made from polymethyl methacrylate (PMMA) and can be easily shaped, molded, or machined. Plexiglass is used in a wide range of applications, including automotive components, aquariums, and displays.

(d) Polychloroprene is a synthetic rubber polymer that is commonly used in the production of adhesives, coatings, and sealants. It is resistant to oil, ozone, and chemicals, making it ideal for industrial applications. Polychloroprene is also used in the manufacture of wetsuits and other sports equipment due to its flexibility and durability.

(e) Boron carbide (B4C) is a ceramic material that is known for its extreme hardness and high melting point. It is used in the production of armor plates, cutting tools, and abrasive materials due to its resistance to wear and tear.

(f) Cast iron is a group of iron-carbon alloys that are commonly used in the manufacture of industrial machinery, pipes, and automotive components. It is known for its high strength, wear resistance, and heat retention. Cast iron is also used in the production of cookware due to its excellent heat distribution and retention properties.

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Answer:

fossils are rare bc most dead organisms get decayed by environmental change and decomposers,most fossils are parts of bones and mostly found indry areas like deserts

The balanced chemical equation for the reaction between sodium and oxygen to form sodium oxide is: 4Na + O2 → 2Na2O According to the balanced equation, 4 moles of sodium react with 1 mole of oxygen to produce 2 moles of sodium oxide.

Therefore, the stoichiometric ratio is 4:1:2 (sodium:oxygen:sodium oxide). If you have 8 moles of sodium, you can use the stoichiometry to determine the amount of sodium oxide produced. Since the ratio of sodium to sodium oxide is 4:2, you would expect to produce half the number of moles of sodium oxide compared to the moles of sodium. Therefore, with 8 moles of sodium, you would expect to produce 4 moles of sodium oxide.

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Answer: Upon successive breakage into smaller cubes, each time by halving the sides, the volume remains constant while the surface area increases dramatically. The total area of all cubes at each iteration is the red dot on the continuous line plot of area/volume.

Explanation: Hope this helps

Answer:

The total volume is the same and the total surface area doubles.

Explanation:

We know that the total volume for the large cube and the total volume for the small cubes is the same but that the surface area for the smaller cubes is double that of the large cube. So the volume-to-surface-area ratio is as to for the large cube and as to two for the small cubes. The smaller cubes are much more reactive than the large cube because of this ratio. And that is why nanoparticles are so reactive and so useful to us because of this large surface area and very small particles.

Answer:

b. a meadow replacing a pond in it's flood plain

Explanation:

I'ts a secondary succession.

The birth rate is  28.2 births per year

The number of births per 1,000 persons in a particular population over a given time period is commonly used to determine the birth rate.

The following is the formula that can be used to calculate the birth rate:

(Number of births / Population) x 1,000 is the birth rate.

The birth rate can be obtained from;

Birth rate = (Number of births / Population) x 1,000

We know that the birth rate can be obtained from;

7.34 x 10^4 / 2.6 x 10^6  * 1000

= 28.2 births per year

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Taking into account the reaction stoichiometry, a mass of 49.6 grams of NO can be formed from 4.96 moles of NO₂.

In first place, the balanced reaction is:

3 NO₂ + H₂O  → 2 HNO₃ + NO

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate:

The following rule of three can be applied: if by reaction stoichiometry 3 moles of NO₂ form 30 grams of NO, 4.96 moles of NO₂ form how much mass of NO?

mass of NO= (4.96 moles of NO₂× 30 grams of NO)÷3 moles of NO₂

mass of NO= 49.6 grams

Finally, 49.6 grams of NO can be formed.

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Answer:

poor access to health care providers

Explanation:

without health care providers you cant get tested.

Answer:

The answer is 720 x 9

So she rides her bike for 6480 seconds or 108 minutes or 1.8 hours.

Answer:

Dna

Explanation:

You're welcome

The amount of CO2 produced by reaction with 6 kg of bicarbonate with excess hydrochloric acid is 1837.89 L.

This situation's chemical reaction is NaHCO3 + HCl NaCL + H2O + CO2 (g).

M 84 g/mol NaHCO3

44 g/mol for M CO2

As we have 6.00 kg of sodium bicarbonate, 6 kg of sodium carbonate equals 71.43 kg of sodium carbonate.

Because of the chemical reaction's stoichiometry:

71.43 moles of NaHCO3 are equal to 71.43 moles of CO2, and vice versa.

Additionally, since CO2 is an ideal gas, we can apply the formula shown below:

PV=nRT where n = 71.43 mol, R = 0.083 Ltxatm, and

V = (nRT)/P (mol K)

T = 37 °C, K = 310, and atm = 1

This means that V = (71.43x0.083x310)/1 V

CO2 = 1837.89 Lt.

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Answer:

True

Explanation:

In a spiral galaxy, stars had and dust is collected in spiral arms that spread outward from the center of the galaxy. This type of galaxies is composed of young and old stars; being the older ones usually found in the nucleus. Therefore, this statement is True. I

Answer:

true

Explanation:

Answer:

true

Explanation:

Answer:

False..

Explanation: parasites do not provide you with anything good. The parasite obtains nutrition directly from the body of the host

Answer:

b evaporating the water

Explanation:

Explanation:

Covalent bonds can be classified based on the number of bonds between atoms into three categories:

1. Single Covalent Bond: In a single covalent bond, two atoms share one pair of electrons. This is the most common type of covalent bond. For example, in H2O, each hydrogen atom forms a single covalent bond with the oxygen atom.

2. Double Covalent Bond: In a double covalent bond, two atoms share two pairs of electrons. This bond is stronger than a single covalent bond. For example, in O2, the oxygen atoms are connected by a double covalent bond.

3. Triple Covalent Bond: In a triple covalent bond, two atoms share three pairs of electrons. This bond is the strongest among the three types. For example, in N2, the nitrogen atoms are connected by a triple covalent bond.

It is important to note that the number of bonds between atoms is determined by the number of electrons they need to achieve a stable electron configuration, which varies depending on the elements involved.

The covalent bond is classified mainly into three types

single, double and triple bonds.

Covalent bond is a bond formed between two atoms through the sharing of two electrons between them.  The atoms will share more than one electron pairs if the valency is not satisfied.  the three types of covalent bond are single bond, double bond and triple bond.

single bond is formed when one pair of electrons are shared between atoms, while if two pairs or three pairs are shared, it is called double or triple bond respectively. Covalent compounds are those which contains covalent bonding.

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Answer:

Thus, the element containing the greatest number of atoms is 12 g He. Thus, the correct option is (4) 12 g He. Note: The number of atoms of a compound is Avogadro's number for 1 mole of compound. The number 6.022×1023 is known as Avogadro's number.

Explanation:

(4)✔️ 12 g He

please follow me.

Answer:

120gram I think so this is the answer if the answer is correct plz mark me as brainliest.

Diagram A shows the repeating groups of atoms that make up the ending substances. The atom is the fundamental component of the chemical component.

An atom is indeed a particle made up of a nucleus of neutrons and protons surrounded by an electron cloud. The atom is the fundamental component of the chemical components, as well as the chemical elements being characterized by the amount of protons in their atoms.

For example, every atom with 11 protons becomes sodium, while any atom with 29 protons becomes copper. The element's isotope is defined by the number of neutrons. Diagram A shows the repeating groups of atoms that make up the ending substances.

Therefore, diagram A shows the repeating groups of atoms that make up the ending substances.

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