Why don’t all salts make a one-to-one ratio?

Answer:

A. Food

Explanation:

Water alone does not give energy, Carbon Dioxide cannot be consumed healthily, and photosynthesis is for plants.

Answer:

Option (A) the solid X is ground to a fine powder.

Explanation:

X(s) + 2B(aq) → X+(aq) + B2(g)

In the reaction above, the rate of the reaction will be highest, when X being a solid is ground to fine powder.

Grounding X to fine powder simply means increasing the surface area of X.

An increase in surface area of reactants will definitely increase the rate of reaction because the particles of the solid will collide with the right orientation and hence speed up the reaction rate.

It possible to eat acidic things without changing your blood pH blood can absorbed small amounts of acids or bases without harmful effects.

The body has systems in place to maintain a steady pH, so little pH variations don't hurt the body. Researchers frequently claim that eating more or less acidic or alkaline meals has little to no effect on blood pH levels.

High blood acid levels are typically a symptom of underlying diseases like diabetes or kidney issues. By excreting acids in urine, the kidneys control the blood's pH. Additionally, they generate and control bicarbonate, which raises the pH of the blood. These changes could take hours or days, taking longer than those brought on by breathing.

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The pH at the equivalence point in titrating 0.100 M solution of HBr with 0.080 M NaOH is 1.699.

What is pH?

pH is defined as the negative logarithm of H+ ion concentration. Hence the meaning of the name pH is justified as the power of hydrogen. Mathematical definition of pH is-

pH = -log [H+]

Given,

Concentration of HBr = 0.100 M

Concentration of NaOH = 0.080 M

HBr + NaOH → NaBr + H₂O

Hydrogen ions get neutralised by hydroxide ions and remaining H+ concentration is = 0.1 - 0.08 = 0.02M

pH = -log [0.02]

pH = 1.699

Therefore, the pH at the equivalence point in titrating 0.100 M

solution of HBr with 0.080 M NaOH is 1.699.

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The diagram represents a nuclear fission reaction where a Uranium-235 nucleus absorbs a neutron, becomes unstable and splits into two fragments releasing energy and neutrons.

Nuclear fission is the process of splitting an atomic nucleus into two or more smaller nuclei with the release of energy, while nuclear fusion is the process of combining two or more atomic nuclei into a larger nucleus with the release of energy.

In a nuclear fission reaction, energy is released due to the conversion of a small amount of mass into a large amount of energy, in accordance with Einstein's famous equation E=mc^2. The release of energy occurs when the Uranium-235 nucleus splits into two fragments, releasing neutrons and gamma radiation in the process.

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Since the notebook and cubes are balanced at the same level on the scale, the mass of the notebook and sugar cubes are equal.

The correct option is C.

The amount of matter that makes up every object or body is the greatest way to understand mass. Everything that we can see has mass. Examples of objects with mass include a table, a chair, your bed, a football, a glass, and even air.

Masses are measured using scales.

The most typical way to measure it is as inertial mass, which refers to an object's resistance to acceleration under the influence of a net force.

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Complete question:

Ashley placed a notebook and sugar cubes on a scale.

The notebook and cubes are balanced at the same level on the scale.

Which of these describes the mass of the notebook and sugar cubes?

a. The mass of the notebook is greater than the mass of the sugar cubes

b. The mass of the notebook is less than the mass of the sugar cubes

c. The mass of the notebook is equal to the mass of the sugar cubes

The triprotic acid phosphoric acid, also called orthophosphoric acid, is present as a viscous liquid. 74.3 mls H3PO4 needed to prepare their solution by diluting the stock.

First part:

Use V1M1 = V2M2 for such a dilution problem.

V1 = initial volume = ?

M1 = initial molarity = 2.1 M

V2 = final volume = 285 ml

M2 = final molarity = 0.31 M

(V1)(2.1)( = (285)(0.31)

V1 = 40.7 mls of 2.1 M H3PO4 are needed

Second part:

Utilising 0.28 M H3PO4, find mls needed to react with 125 ml of 0.250 M Ca(OH)2.

The balanced equation for this reaction is:  3Ca(OH)2 (aq) + 2H3PO4 (aq) ---> Ca3(PO4)2 (s) + 6H2O (l)

First we'll discover the moles of Ca(OH)2 present:

125 ml x 1 L/1000 ml x 0.250 mol/L = 0.03125 mols Ca(OH)2 present

From the balanced equation, we now find moles of H3PO4 needed:

0.03125 mols Ca(OH)2 x 2 mols H3PO4 / 3 mols Ca(OH)2 = 0.0208 mols H3PO4 needed

Finally, we find volume (mls) of H3PO4 needed:

0.0208 mols H3PO4 x 1 L / 0.28 mols = 0.0743 L x 1000 ml/L = 74.3 mls H3PO4 needed.

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Explanation:

Density of object = gram/volume

= 100 g/ 5 cm³

= 20 g/cm³

The density of an object that is 100 grams and has a volume of 5 cubic centimeters is 20 g/cm³.

Density of any object will be calculated by using the below equation:

ρ = m/V, where

m = mass of object = 100g

V = volume of object = 5 cm³

On putting values we get,

ρ = 100/5 = 20 g/cm³

Hence required density is 20 g/cm³.

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Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean.

Precipitation would decrease salinity by decreasing the amount of dissolved material in the ocean. When it rains, freshwater from the atmosphere mixes with the saltwater in the ocean, diluting the concentration of salt in the water. This can lead to a decrease in the overall salinity of the ocean.

Evaporation would have the opposite effect, as it removes water from the ocean and leaves behind a higher concentration of dissolved salts. Sea spray and a large volcanic eruption could also potentially impact the salinity of the ocean, but the overall effect would depend on the specific details of the event.

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Complete Question :

Which of the following would decrease salinity by decreasing the amount of dissolved material in the ocean?

A. evaporation

B. a large volcanic eruption

C. sea spray

D. precipitation

The correct option is d. It can replace the base thymine, and can base pair with guanine rather than adenine.

The base analog 5-bromouracil (5-BU) can create a mutation by replacing the base thymine and base pairing with guanine instead of adenine. When the DNA is replicating, the 5-BU base can base-pair with guanine instead of adenine. Hence, when the DNA replicates, a G-C base pair forms instead of the normal A-T pair. This creates a transition mutation, which is the substitution of one purine for another purine, or one pyrimidine for another pyrimidine.

The given options and their explanation are:

a. It can form thymine dimers - The formation of thymine dimers is caused by exposure to UV light. Thymine dimers cause distortions in the DNA helix and can create kinks in the DNA strand, which may lead to the wrong nucleotide being incorporated during DNA replication. Hence, this option is incorrect.

b. It creates bulges in the DNA that must be repaired - When a chemical agent reacts with DNA, it can cause the DNA strand to bulge out. This creates an irregularity in the DNA strand, which the cell's repair system will attempt to correct. Therefore, this option is incorrect.

c. It causes double-stranded breaks of the DNA - Double-stranded breaks happen when both strands of the DNA molecule are broken. The break can happen due to exposure to high-energy radiation or free radicals that react with the DNA backbone. Therefore, this option is incorrect.

d. It can replace the base thymine, and can base pair with guanine rather than adenine - 5-bromouracil replaces thymine in the DNA molecule and can base-pair with guanine instead of adenine. Therefore, this option is correct.

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Answer: the atomic size will decrease

Explanation:

Answer:

It will remain the same because it is moving up and down to and fro it can not increase nor decrease or else will become an ion

Answer:

They vibrate about a fixed position

Answer:

Final pressure = 1848.36 Torr

Explanation:

Given that,

Initial volume, V₁ = 5.2 L

Initial pressure, P₁ = 782 Torr

Initial volume, V₂ = 2.2 L

We need to find the final pressure. We know that the relationship between pressure and volume is given by :

\(P\propto \dfrac{1}{V}\\\\\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{782\times 5.2}{2.2}\\\\P_2=1848.36\ torr\)

So, the final pressure is equal to 1848.36 Torr.

Answer:

3rd option

Explanation:

Answer:

A. Weathering breaks down rocks; Deposition leaves them in new places.

Explanation:

Weathering is basically the complete process of rocks breaking apart.  In contrast, deposition is when the rocks are moved and carried away from their original place and put in new locations.

Answer:

a

Explanation:

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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The correct ion product expression for calcium phosphate, Ca3(PO4)2, is C. [Ca2+]3[PO43-]2.

The ion product expression represents the mathematical relationship between the concentrations of ions in a solution that can be used to determine the solubility of a compound. In the case of calcium phosphate, Ca3(PO4)2, the compound dissociates into three calcium ions (Ca2+) and two phosphate ions (PO43-). Therefore, the ion product expression should reflect this stoichiometry, which is represented by option C: [Ca2+]3[PO43-]2.

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Answer:

Explanatidescribe everyday events such as shaving, ear peircing, and brushing teeth so that they do not sound like "primitive" customs.

on:

Answer:

Cl2Ni

Hope this helps!

I can help you with the hardest questions.

May I have brainliest, please?

Answer:

the mass of a tree is primary carbon

Explanation:

the the carbon comes from carbon dioxide during photosynthesis

Answer:

Plants get all the carbon, hydrogen, and oxygen they need from carbon dioxide and water, which they use to build carbohydrates during photosynthesis. To build other kinds of molecules they also need elements like nitrogen, phosphorous, and sulfur. Plants get these as well as other elements from the soil.

Explanation:

Answer:

The Correct IUPAC name is H3C - CH (CH3) - CH (C2H5) - (CH2)2 - CH3 Class 11

Explanation:

yes searched np is maybe right i not 100% sure i 50% is it right >:) tell if u got it right >:D

Answer:

4-ethyl-6-methyl-3-heptene

Explanation:

Longest chain is seven long so it is heptane

But there is a double bond, so that becomes heptene

The double bound starts on the third carbon, so it is 3-heptene (this tells us where the double bond is)

Now we just got to do the substituents!

There is a ethyl group of the fourth carbon and then a methyl group on the sixth!

Ergo, 4-ethyl-6-methyl-3-heptene

Answer:

C

Explanation:

Because NH3 has 8 valence electrons, and Hydrogen can only have 1 bond

Answer:D-when explaining and documenting their work

Explanation:I took the k-12 test and got it right!:) Hope this helps!!!!

Scientists can engage in various activities in various sequences. It can be best explained by documenting and explaining their work. Thus, option D is correct.

The scientific method has been a series of events that uses observed phenomena to conduct research by testing the hypothesis that raises the question. It conducts the experiment and reaches the results to conclude the findings.

In various scientific sequences, scientists can be engaged at a time similar to explaining and documenting the work involves representation of the proper rationale and its deep and thorough explanation so to justify the hypothesis and its accountability.

Therefore, option D. the explanation and documentation are the various activities involved in different sequences.

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Replacing the air inside a metal organ pipe with helium gas would raise the pipe's pitch because helium gas has a lower molecular weight than air. This means that the speed of sound is faster in helium gas than in air. When a pipe is blown, the air molecules inside it vibrate and create sound waves.

The frequency of these sound waves determines the pitch of the note that is produced.

When helium gas is used instead of air, the sound waves travel faster through the lighter gas, resulting in a higher frequency and therefore a higher pitch. This is because the wavelength of the sound waves is shorter in helium gas than in air, so more waves can fit inside the pipe during a given period of time, resulting in a higher frequency.

Overall, replacing the air inside a metal organ pipe with helium gas is a way to alter the pitch of the note produced, making it higher due to the faster speed of sound in helium gas.

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The student should take the average of the results from all four trials to obtain the highest level of accuracy.

Chemistry's definition of accuracy is how closely a measurement resembles the actual value.

Three categories of accuracy exist:

1) Point accuracy signifies that accuracy is present only at that scale point.

It provides no details regarding the instrument's accuracy.

2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.

3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.

Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.

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Answer:

1- Environmental Value System or EVS is a worldview that molds the way both individuals and the societies they form perceive and therefore evaluate environmental concerns.

2-Entropy/ the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.

3-Equilibrium/a state of balance between opposing forces or actions that is either static

4-Feedback/a return of information about a result or the returned portion of a process.

5-Feedback,negative/ is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output.

6-Feedback,positive/ is the amplification of a body's response to a stimulus.

7-Gaia/ all organisms and their inorganic surroundings on Earth are closely integrated to form a single and self-regulating complex system

8-Model/a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes.

Answer:

The change from a liquid phase to a gaseous phase.

so the answer would be it changed to a gaseous phase

---------------

This is what occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.

Answer:

but iron is 2 and 3 by its valance how could it be possible

The new volume of sample gas at room temperature with no change in temperature or moles of gas is 7.6 liters

Calculation→

The new volume is calculated using Boyle's  law formula

That  is  P₁V₁=P₂V₂

where,

p₁ =  782 torr

V₁ = 38.0 l

P₂ = 3910 torr

V₂= New volume

make  V₂ the subject of the formula  by diving  both side of equation bP₂

V₂ = P₁V₁/P₂

V₂  is therefore = {(38.0 l × 782 torr) 3910 torr}  = 7.6 L

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