What is an individual living entity called?


tissue


cell


organism


organ

The thermal energy will affect the temperature of road and increase the temperature which causes cracks on the roads after some times. Thus the construction team must use temperature resistant material.  

Thermal energy is defined as internal energy present in a thermodynamically balanced system as a result of its temperature.

It can also be defined as the energy derived from matter's temperature.

There are three types of thermal energy transfer.

Thus, the  thermal energy will affect the temperature of road and increase the temperature which causes cracks on the roads after some times. Thus the construction team must use temperature resistant material.  

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The field of chemistry that explains why bromine trifluoride reacts differently than water vapor during a reaction is called chemical kinetics.

What is Energy?

Energy is a fundamental concept in physics, often defined as the ability to do work. It can take many different forms, including thermal energy, kinetic energy, potential energy, electromagnetic radiation, and chemical energy, among others. Energy can be transferred from one system to another, and it can also be converted from one form to another. The SI unit of energy is the joule (J), although other units such as the calorie and the electronvolt are also used in specific contexts.

The field of chemistry that explains why bromine trifluoride reacts differently than water vapor during a reaction is called reaction kinetics. Reaction kinetics is the study of how fast chemical reactions occur and what factors affect the reaction rate. It takes into account factors such as the nature of the reactants, concentration, temperature, surface area, and the presence of a catalyst or inhibitor.

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C. The pH stays about the same.

Answer:

C.The pH stays about the same.

Explanation:

Buffer reactions maintain stable pH of solutions.

Answer:

8

Explanation:

Answer:

See explanation

Explanation:

Heat of formation, also called standard heat of formation, enthalpy of formation, or standard enthalpy of formation, the amount of heat absorbed or evolved when one mole of a compound is formed from its constituent elements, each substance being in its normal physical state (gas, liquid, or solid)(Encyclopedia Britannica).

The greater the magnitude of the negative value  of the heat of formation(the more negative), the greater stability of the compound formed. Hence, a more negative heat of formation (a larger negative number) means that a compound is more stable than an isomer with a less negative heat of formation.

A more negative heat of formation (a larger negative number) mean a compound is more stable.

The change in enthalpy during the creation of 1 mole of a material from its constituent elements is known as standard heat of formation of a compound.

The standard heat of formation is the amount of heat absorbed or released when one mole of a compound is formed from its constituent elements.

The larger the negative value of the heat of formation (the more negative), the more stable the compound created will be.

Thus, the more negative heat of formation (a larger negative number) mean a compound is more stable.

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The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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Answer:

concentration is the abundance of a constituent divided by the total volume of a mixture.

Explanation:

hope this helps <33

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Answer:

B. Unit conversions express an amount in a different unit

Answer:

Ionic compounds conduct electricity when molten or in aqueous solution, because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.

Explanation:

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To find the mass percent of the solution, we have to divide the mass of solute by the mass of solution and multiply it by 100.

The mass of solution will be the sum of the mass of the solute and the mass of the solvent:

It means that the mass percent of NaCl in the solution is 26.41%

Answer:

5.25 grams of potassium sulfate will get crystallize out.

Explanation:

Solubility of potassium sulfate at 40 °C = 15 g/100 g

This means that at 40 °C 15 g of potassium sulfate will get completely dissolved in 100 of water.

39.0 g of potassium sulfate to 225 g water, carefully heating the solution.

Amount of potassium sulphate will get dissolve in 225 g of water at 40 °C will be:

\(\frac{15g}{100g}\) × 225 = 33.75g

Amount of potassium sulfate precipitated out by the solution:

= 39.0 g-33.75 g = 5.25 g

At 40 °C 5.25 g of potassium sulfate will get precipitate out from the solution which means that solution is saturated.

Saturated solution are solution in which solute is dissolved in maximum amount. Further addition of solute results in precipitation of solute form the solution.

5.25 grams of potassium sulfate will get crystallize out.

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Answer:

\(\huge\boxed{\sf M = 0.06\ M}\)

Explanation:

No. of moles = n = 0.03 mol

Volume = v = 500 ml = 0.5 L

Molarity = M = ?

M = n / v

Put the given data in the above formula.

M = 0.03 / 0.5

\(\rule[225]{225}{2}\)

The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is  113.30 J. Option D

The kinetic energy of an object can be calculated using the formula: KE = (1/2)mv^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity or speed of the object.

Given:

Mass (m) = 23.2 g = 0.0232 kg

Speed (v) = 98.7 m/s

Substituting these values into the formula, we can calculate the kinetic energy:

KE = (1/2)(0.0232 kg)(98.7 m/s)^2

KE = (1/2)(0.0232 kg)(9756.09 m^2/s^2)

KE ≈ 113.30 J

Therefore, the kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is approximately 113.30 J.

It's worth noting that the question is repeated twice, but the answer remains the same. The kinetic energy of the object is determined by its mass and speed, and both calculations yield the same result. Option D

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Answer:

Na2HAsO4 + NaOH → Na3AsO4 + H2O

Explanation:

The arseniate specie (Na2HAsO4) contains 1 proton that is acidic. This acidic proton will react with a base as NaOH to produce water and the related salt. The acid-base reaction is:

H+ + NaOH → H2O + Na+

Now, the arsenate species reacts as follows:

Answer:

Argon is a member of the noble gas family of elements. This means that it already has eight valence electrons in its outermost shell. Because of this, Ar rarely bonds with other atoms to form compounds

Explanation:

The rate law for the overall reaction is, \(k[A][B]\).

Rate law, It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

As we are given the mechanism for the reaction :

Step 1 :  \(A+B \rightarrow AB\)  (slow)

Step 2 : \(A+AB \rightarrow A_2B\) (fast)

Overall reaction : \(2A+B \rightarrow A_2B\)

The rate law expression for overall reaction should be in terms of A and B.

As we know that the slow step is the rate determining step. So,

The slow step reaction is, \(A+B \rightarrow AB\).

The expression of rate law for this reaction will be, \(k[A][B]\)

Hence, the rate law for the overall reaction is \(k[A][B]\).

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Answer:

Explanation:

Small changes in the chemical nature of polysaccharides can make a big difference in how they work in our bodies. Polysaccharides are complex carbohydrates found in things like fiber and medicines. Even tiny changes in their structure can affect how they are digested, how they interact with cells, and their overall impact on our health. Scientists can use these changes to create materials with specific properties or develop new treatments. So, even small tweaks in polysaccharides can have a significant impact on how they function in our bodies.

Answer:

Once a density has been calculated the tool will also display two conversion scales for a range of mass and volume values

Explanation:

The density of this particular liquid is \(5833 kg/ m^3\).

Density is defined as mass per unit volume. It is a standard mechanical quantity. The most frequently used symbol for density is ρ (rho), D can also be used which is a Latin letter.

It can be expressed as

\(\rho ={\frac {m}{V}}\\\\\rho = density \\m = mass\\V = volume\)

Density is expressed in \(kg/m^3\) , mass in kg and volume in \(m^3\)

For above given information,

Mass= 350 g= 0.350kg

Volume= 60ml = 0.00006 \(m^3\) (\(1ml= 1/10^6 m^3\))

So, Density= 0.350/0.00006 = \(5833 kg/m^3\)

Thus, the density of this particular liquid is \(5833 kg/ m^3\).

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Answer:

Jowhwbeejwieiebbej sssie ksihejwiiwb isjbeiis

Answer:No

Explanation

Answer:

Hydrogen fuel typically reacts with oxygen in a chemical reaction to produce water (H2O) as the main product. The chemical equation for this reaction is:

2H2 + O2 → 2H2O

The reaction releases energy, which can be harnessed to power engines or generate electricity. When hydrogen fuel is burned in an engine or fuel cell, the only byproduct is water vapor, which is harmless to the atmosphere.

However, the production of hydrogen fuel can have environmental impacts if it is not produced using renewable energy sources. The most common method of producing hydrogen involves using natural gas, which releases carbon dioxide and other greenhouse gases into the atmosphere. Therefore, it is important to consider the source of the hydrogen fuel and the environmental impact of its production when evaluating its benefits for reducing emissions and improving air quality.

The chemical equation for the combustion of hydrogen can be represented as follows: 2H₂ + O₂ → 2H₂O

In this reaction, two molecules of hydrogen gas (H₂) combine with one molecule of oxygen gas (O₂) to form two molecules of water vapor (H₂O). The reaction releases a significant amount of energy in the form of heat.

The products of the combustion of hydrogen, which are water molecules, do not have significant adverse effects on the atmosphere. Water vapor is a natural component of the Earth's atmosphere, and its presence is essential for various natural processes, such as the water cycle.

However, it is important to note that the combustion of hydrogen as a fuel can indirectly affect the atmosphere in certain scenarios. One consideration is the generation of the primary energy used to produce the hydrogen fuel.

Additionally, the transportation and storage of hydrogen as a fuel may present challenges. If there are any leaks or improper handling, hydrogen gas can contribute to the formation of local air pollution. However, these issues can be managed through appropriate safety measures and technology advancements.

Overall, the combustion of hydrogen fuel with oxygen produces water as a product, and the water vapor does not have direct adverse effects on the atmosphere.

However, the environmental impact associated with hydrogen as a fuel depends on the methods used for its production and transportation. Sustainable production methods, such as electrolysis using renewable energy sources, can minimize the environmental impact of hydrogen fuel.

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Based on the reactants and products,

A precipitate is a solid product formed in when two solutions of salts react by double replacement.

The molecular equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al(NO3)3 + 3 KOH ---> Al(OH)3 + NaNO3

The complete ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

Al3+ 3NO3- + 3 K+ 3OH- ---> Al(OH)3(s) + 3 Na+ 3 NO3+

The net ionic equation of the reaction of Al(NO3)3 solution with a KOH solution is:

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Answer:

AHO3 is a reported alias name for the human gene HDAC4, or 'histone deacetylase 4'. The 1084-amino acid protein is a member of the Histone deacetylase family, HD type 2 subfamily. The cellular localization is predicted to be cytoplasmic and nuclear.

Alumina, also called aluminum oxide, synthetically produced aluminum oxide, Al2O3

Answer:

red in acid and green in a base

Explanation:

cabbage juice liquid thing is a pH indicator

Hard water contains higher levels of minerals such as calcium and magnesium, while soft water has low levels of these minerals. While both hard and soft water can be safe for drinking, hard water is generally considered safer due to the minerals it contains.

The minerals in hard water can actually be beneficial to human health, as they are important for strong bones and teeth. In addition, the minerals in hard water can help to balance the body's electrolytes and may have other health benefits.

Soft water, on the other hand, may contain higher levels of sodium or other chemicals used in the softening process. While these levels are generally considered safe, some people with certain health conditions may need to avoid drinking water with higher sodium levels.

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Answer

128.62 g LiHCO

Explanation

Balanced chemical reaction:

LiOH + CO₂ → LiHCO₃

Molar masses

LiOH = 23.95 g/mol

CO₂ = 44.01 g/mol

LiHCO₃ = 68.0 g/mol

From the balanced chemical reaction;

1 mol LiOH → 1 mol LiHCO₃

Note: 1 mole of LiOH contains 23.95 g/mol and 1 mole of LiHCO₃ has 68.0 g/mol.

So,

23.95 g/mol LiOH → 68.0g/mol LiHCO

45.3 g LiOH → (68 x 45.3)/23.95 g = 128.62 g LiHCO

128.62 g LiHCO is

J.J. Thomson used magnetic and electric fields to measure the mass to charge ratio of a cathode ray particle.

What is a magnetic field?

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Answer:

28645 years

Explanation:

Given the formula;

0.693/t1/2 = 2.303/t log (No/N)

Given that N = 1/32 No

Note;

t1/2 = half life of Carbon-14

t = time required for N amount of carbon -14 to remain= 5,730 years

No= amount of carbon 14 initially present

N = amount of carbon-14 after time t

Substituting values;

0.693/5,730 = 2.303/t log (No/1/32No)

0.693/5,730 = 2.303/t log 32

1.21 * 10^-4      = 3.466/t

t = 3.466/1.21 * 10^-4

t = 28645 years

Any preserved imprints, remains and traces of once a living organism from history are called fossils. By utilizing the radioactive property of organic compounds one can determine the age of an object.

The approximate age of the fossilizes remain is 28645 years.

This can be estimated as:

The formula used will be:

\(\dfrac{0.693}{\dfrac{t1}{2}}= \dfrac{2.303}{t} log (\dfrac{No}{N})\)

Where,

Given,

N = \({\dfrac{1}{32} No\)

Replacing values in formula:

\(\dfrac{0.693}{5,730} & = \dfrac{2.30}{t} log \:({{\dfrac{No}{\dfrac{1}{32} No}})\)

\(\dfrac{0.693}{5,730} & = \dfrac{2.30}{t} \;log 32\)

\(1.21 \times 10^{-4} = \dfrac{3.466}{t}\)

\(t = \dfrac{3.466}{1.21} \times 10^{-4}\)

\(t = 28645 \:\text{years}\)

Therefore, the approximate age of the fossil is 28645 years.

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Answer:

Ca

Explanation:

It is on the left side of the periodic table where metals are located.

Answer:

Ca

Explanation:

The gram and kilogram are the units which are used to measure the mass of the objects. The unit kilogram is used to measure the mass of heavier objects. The nearest gram of 497.680g is 498 g.

The term mass is the most basic property of the matter. The mass of an object is defined as the measure of the amount of matter present in an object. The SI unit of mass is kg.

The mass can never be zero and it is a scalar quantity.

Here  497.680g = 498 g

Thus the 497.680g to the nearest 1g is 498 g.

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