Sodium hydroxide is a common_________

Answer:

chemical reactions

Explanation:

Answer:

chemical reactions

Explanation:

Chemical reactions like weathering can cause rock and earth movement, plants grow from rain which is weathering, snow is weathering and cold winters is freezing water. I don't see how flowing water can contribute to weathering because in rivers, creeks, etc, always flowing. So if flowing water is always moving, it's not caused by weathering.

I EDITED MY ANSWER:

Physical weathering is caused by purely mechanical changes to the rock, while chemical weathering is caused by chemical reactions. The answer is chemical reactions

Based on the formula to determine the freezing point depression of the solvent, the freezing point of the solution is 263.85 K.

The freezing point of a substance is the temperature at which the liquid changes to solid without any further decrease in temperature occurring during the process.

The addition of solute substances in liquids usually lowers the freezing point of the liquid solvent.

The formula to determine the freezing point depression of solvent is given below:

where'

The molality of the given solution = moles of solute/kg of solvent

moles of solute = 46/92

mass of solvent = 100 g or 0.1 kg

Molality of solution = (46/92) / 0.1

Molality of solution = 5

for glycerine, i = 1

ΔT = ΔT = 1 * 1.86 * 5

ΔT = 9.3

The freezing point of the solution = 273.15 - 9.3

The freezing point of the solution = 263.85 K

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Answer:

The d-block and transition metal are not interchangeable terms because the d-block elements are a subset of the transition metal elements. The transition metals are defined as the elements that have partially filled d orbitals, which includes the d-block elements as well as other elements that have partially filled d orbitals in other blocks, such as lanthanides and actinides. Therefore, while all d-block elements are transition metals, not all transition metals are d-block elements.

After 2 half-lives there will be 25% (1/4th) of the original isotope, and 75% (3/4 th) of the decay product

A half life is a measurement of the slope of an exponential decay function.

It is also defined as, the time it takes to halve the concentration of something in a process.

Each half life you will have half of what you had at the beginning of a given half life.

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Answer:

A photons is a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

Explanation:

Light consists of packets of energy (photons) that can only interact with the atoms and molecules of matter by being absorbed or emitted in discrete units. ... Photons carry momentum and energy like particles, but they also have a frequency and a wavelength like a sinusoidal wave. Thanks to photons we know that all quantum particles have both the properties of waves and particles. I hope it helps✌️

Answer: the sentence given by the question is false

Explanation:

The question requires us to determine if the sentence given ("If the concentration of H+ is greater than the concentration of OH- in a solution, the solution is basic") is true or false.

The acidity or alkalinity of a solution can be measured by the amount of H+ ions that are present, and it is numerically represented by the pH of a solution. The pH is calculated based on the concentration of H+ ions, as it follows:

where [H+] corresponds to the concentration, in mol/L, of H+ ions in solution.

The equation above tells us that:

- a high concentration of H+ ions leads to a low pH value (acid solution);

- a low concentration of H+ ions leads to a high pH value (alkaline or basic solution).

A similar idea is applied to the value pOH (which corresponds to -log[OH-]), but a high pOH value indicates an alkaline solution, while a low pOH value corresponds to an acidic solution.

Thus, we can say that, if a solution presents more H+ ions than OH-, its pH value should be low while its pOH value should be high, which indicates an acid solution.

Therefore, the sentence given by the question is false.

Answer:

BTS

Explanation:

The length of segment AB is determined as 11.4 units.

The distance between two points is the length of the line segment that connects the two points in a plane.

The length of segment AB is the distance between point A and point B, which is calculated as follows;

|AB| = √[(x₂ - x₁)² + (y₂ - y₁)²]

where;

|AB| = √[(x₂ - x₁)² + (y₂ - y₁)²]

|AB| = √[(5 - - 4)² + (5 - -2)²]

|AB| = √[(9)² + (7)²]

|AB| = 11.4 units

Thus, the length of segment AB is the distance between point A and B.

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Answer:

wood

Explanation:

i can take the seds from the trees to row new trees and still use the wood without causing deforestation

Answer:5.1L

Explanation:

Explanation:

sexual reproduction has minimal changes of mutations compared to asexual reproduction

Answer:

sexual reproduction has minimal changes of mutations compared to asexual reproduction

I hope this helps

Group 3A or group 13 has all their valence electronic configuration in p1.

The elements in group 13 are: Boron (B), Aluminium (Al), Gallium (Ga), Indium (In) and Thallium (Tl)

As a result, the new organic substance has a heat of combustion per gram of 161.55 kJ/g.

With this method, a sample is burnt in a bomb calorimeter at a constant volume. Equation q = -CT, where C is the calorimeter's heat capacity and T is the temperature change, may be used to determine how much heat is lost during the reaction.

The following formula may be used to get the heat of combustion per gram of the material:

q = -(CΔT)/m

First, let's calculate the temperature change:

ΔT = 28.96 °C - 23.01 °C = 5.95 °C

Next, let's substitute the given values into the formula:

q = -(41.65 kJ/°C × 5.95 °C) / 1.547 g

q = -161.55 kJ/g

The result must be changed to a positive value by changing the sign since the heat of combustion is defined as the heat emitted per gram of material:

q = 161.55 kJ/g

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The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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Answer:

All organisms begin life as a single cell

Explanation:

Single cell also did you know 15 minutes can save you 15% more on car insurance

Answer:

B. the atmosphere

Explanation:

hope it helps

Paper used as a writing material is made of pulp (wood).

Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.

Wood pulp is usually a softwood, used for pulping to make paper.

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Answer:

Ba(OH)2 + 2 HCl → BaCl2 + 2 H2O

The reactants are present in equimolar amounts, so there is no excess or limiting reactants.

(0.0500 L) x (0.600 mol/L HCl) x (2 mol H2O / 2 mol HCl) = 0.0300 mol H2O

(4.184 J/g·°C) x (50.0 g + 50.0 g) x (25.82 - 21.73)°C = 1711.256 J

(1711.256 J) / (0.0300 mol H2O) = 57042 J/mol = 57.0 kJ/mol H2O

Explanation:

Answer:

Option C . CO2(g) + H2O(g)

Explanation:

When hydrocarbon undergoes combustion, carbon dioxide (CO2) and water (H2O) are produced.

C2H4(g) + O2(g) —› CO2(g) + H2O(g)

Thus, the product of the unbalanced combustion reaction is:

CO2(g) + H2O(g)

Thus, we can balance the equation as follow:

C2H4(g) + O2(g) —› CO2(g) + H2O(g)

There are 2 atoms of C on the left side and 1 atom on the right side. It can be balanced by putting 2 in front of CO2 as shown below:

C2H4(g) + O2(g) —› 2CO2(g) + H2O(g)

There are 4 atoms of H on the left side and 2 atoms on the right side. It can be balanced by putting 2 in front of H2O as shown below:

C2H4(g) + O2(g) —› 2CO2(g) + 2H2O(g)

There are a total of 6 atoms of O on the right side and 2 atom on the left side. It can be balanced by putting 3 in front of O2 as shown below:

C2H4(g) + 3O2(g) —› 2CO2(g) + 2H2O(g)

Thus, the equation is balanced.

The oxidation number of Ag in Ag2O is +1.

In Ag2O, there are two silver atoms (Ag) and one oxygen atom (O). Oxygen is known to have an oxidation number of -2 in most compounds. Since the compound is neutral, the sum of the oxidation numbers of all the atoms must equal zero.

Therefore, the oxidation numbers of the two silver atoms must add up to +2 to balance out the -2 oxidation number of the oxygen atom. Since there are two silver atoms, each silver atom must have an oxidation number of +1 to yield a total oxidation number of +2 for the compound.

In Ag2O, the silver atoms lose one electron each to form Ag+ ions. This results in an oxidation number of +1 for each silver atom. The oxygen atom gains two electrons from the silver atoms to achieve a stable octet configuration, resulting in an oxidation number of -2 for the oxygen atom. The compound Ag2O is formed through the transfer of electrons, with each silver atom exhibiting an oxidation number of +1.

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The spectrum is consistent with the electron shell model of the atom because it shows that electrons are being released from each of the energy levels of the atom in order from lowest to highest.

What is the electron ?

The electron is a subatomic particle with a negative electrical charge. It is the smallest and most fundamental particle of the atom. Electrons are found in the electron cloud of the atom, which is the region outside the nucleus. Electrons have a mass of about 9.10938356 x 10^-31 kilograms, which is about 1/1836 that of the proton. Electrons are the primary carriers of electricity in solids, and they are involved in all chemical reactions. Electrons occupy the outermost shell of the atom and are responsible for the chemical properties of the element. They determine the chemical behavior of an atom and are the main component of electrical circuits. Electrons are also responsible for the formation of ionic bonds, which are the basis of life and all other chemical processes.

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Answer:

circulatory and respiratory

Explanation:

your welcome :)

Option  D. Water is a renewable resource that can be used to generate electricity through a process called hydropower.

Hydropower is a clean and sustainable method of producing electricity, as it does not involve the burning of fossil fuels like coal, which contributes to air pollution and climate change.

In hydropower systems, the kinetic energy of flowing or falling water is harnessed and converted into electrical energy. This is typically achieved by constructing a dam across a river or using a run-of-the-river system, which does not require a large reservoir. As water flows through the dam or system, it turns a turbine connected to an electric generator, producing electricity.

To summarize, water is a renewable resource that can be effectively utilized to generate electricity through hydropower, offering a sustainable, clean, and reliable alternative to non-renewable resources like coal, phosphate, and silica. Therefore the correct option D

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Answer:

D Flat Top Hills Can Be Plateaus or mesas

Explanation:

Explanation:

Because of this, DNA and RNA can easily dissolve in water. ... Adding ethanol helps the Na+ and PO3- ions come together, because ions travel easier in ethanol than water. The supernate is removed and new ethanol is added in the second washing. This removes any residual salt that remained on the pelleted DNA.

Answer:

DNA is polar due to its highly charged phosphate backbone. Its polarity makes it water-soluble (water is polar) according to the principle "like dissolves like". ... This fact makes water a very good solvent for charged compounds like salts.

Your DNA's sugar phosphate backbone is charged. By adding salt, we help neutralize the DNA charge and make the molecule less hydrophilic, meaning it becomes less soluble in water. The salt also helps to remove proteins that are bound to the DNA and to keep the proteins dissolved in the water.

It is well known that Ethanol has a lower dielectric constant than water, making it to promote ionic bond formations between the Na+ (from the salt) and the PO3- (from the DNA backbone), further, causing the DNA to precipitate.

Explanation:

Ideally DNA needs to be precipitated with pellet and should not remain in supernatant. DNA is acidic in nature and therefore, needs optimum salt concentration in the buffer to be pelleted from a solution. At very low salt concentration or without salt DNA would remain in supernatant.