a solution containing a kcl dissolved in water will have a than that of pure water. multiple choice higher boiling point and a lower freezing point none of the answers can be determined with the information provided. lower boiling point and a lower freezing point lower boiling point and a higher freezing point higher boiling point and a higher freezing point

Answer: Planetary scientists have long believed that our moon formed following a collision between Earth and another planet, but studies of Earth and moon rocks suggest ... in its history, Earth was struck a glancing blow by a Mars-sized planet. ... Oxygen, for example, comes in different varieties, called isotopes.The Giant Impact, as pictured in a painting by William K. Hartmann on the ...

Explanation: I hope this was very helpful and A Mars-sized object known as Theia (“mother of the Moon”) crossed into Earth's orbit, ... If this giant impact theory is correct, there should be evidence ... which suggest Theia struck Earth with a glancing blow, the new work implies ... and 18O/16O ratios, scientists can infer different planetary origins by taking ..

The mole ratio of acid to base when neutralizing hydrochloric acid with sodium hydroxide is 1:1. A mole of NaOH would completely neutralize one mole of HCl.

The mole ratio would be 2:1 if the hydrochloric acid and barium hydroxide were to be combined instead. Assuming they react in a 1:1 ratio in accordance with the balanced neutralization equation, the moles of acid and base are identical at the equivalence point in a neutralization. Using the reaction between solutions of hydrochloric acid and sodium hydroxide as an example, let's examine how a neutralization reaction creates both water and a salt. This reaction's general equation is NaOH + HCl H2O and NaCl.

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Answer:

false you can not get a exact location of electrons from just modern science

Answer:

[Co(NH3)5CO3]I3

Explanation:

The naming of coordination compounds follows certain rules specified by IUPAC. Usually, the name of the complex makes it quite easy to deduce its structure.

"Pentaamine" means that there are five NH3 ligands as shown in the structure. The ligand carbonato is CO3^2-.  It has no prefix attached to it in the IUPAC name of the complex hence there is only one carbonato ligand present(recall that the complex has a coordination number of six). I did not enclose it within parenthesis as required in the question.

Lastly the III that appeared after the metal name "cobalt" shows its oxidation state. The iodide counter ions must then be 3 in number in order to satisfy this primary valency of the metal hence the inclusion of I3 in the structure of the complex.

Answer:

I think the insect would be the one in the second photo reading from left to right

Explanation:

the other insects:

the first of the first photo is a change of what would be the external surface of the insect, it is not the insect itself.

In the third photo, the insect has short legs with little grip, which indicates that it does not climb large areas on top, and finally, the 4 image is of an insect that lives in desert areas and is poorly coordinated in areas of high heat. and sand.

These are the reasons why I chose photo number two reading from left to right

Answer:

I would say that your answer would be the second one.( the red one)

Explanation:

because the legs it has seem like it would grip onto trees fairly well.

Answer:

(I) - B

(II) - C
(III) - C
(IV) - D

Explanation:

(I) both of carboxylic acids (B) and alcohols (E) are miscible in H2O, but carboxylic acids increase the acidity of water/solution

(II) Saturated hydrocarbons are from alkane hydrocarbons and they don't have pi bonds, only sigma bonds, and (C) is an alkane (Propane).

(III) Alkanes (C) are unreactive because of sigma bonds which are strong bonds that needs high energy to break

(IV) any unsaturated hydrocarbon (having pi bonds or double bonds, "==" in Lewis Structure) decolourizes Br2 since Br atoms react with the unsaturated hydrocarbon, producing bromo-alkane, for instance, 1-propene (D) + Br2 ---> 1-bromo propane

A 20.0 g sample is composed of 6.1 g of nitrogen (N) and 13.9 g of oxygen (O). 6.1 % by mass of N in the sample. Therefore, option C is correct.

The mass percent of a solution is defined as the ratio of the mass of solute in a solution relative to the total mass of the solution.

Calculate the percent by mass of each element by dividing its mass in one mole of the compound by its molar mass and multiplying by 100%.

To calculate the percent by mass of N, we require dividing the mass of N in the sample by the total mass of the sample and multiply by 100.

% N = mass of N / total mass of the sample x 100

% N = 6.1 g / 20.0 g x 100

= 0.305 x 100

= 30.5%

Thus, option C is correct.

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Answer:

Option C

Explanation:

The equation for showing gravitational pull or force between two objects is as follows -

\(G_f = \frac{G M_1M_2}{r^2}\)

Here Gf is the gravitational force

G is the gravitational constant and

M1 and M2 is the mass of the two objects

As we can see in the equation, that mass of two objects is directly proportional to the gravitational pull between them.

The higher the mass, the higher will be the force.

While on the other hand the distance between the two objects i.e "r" is inversely proportional. The higher the distance between the two objects the lower is the gravitational force between them.

Hence, option C is correct

Answer:

cell,tissue ,organs,organism ,organ system

Answer:

cells, tissue, organ, organ system , and organism

Explanation:

Answer:

1. NaCl

2. NH4F

3. MgO

4.LiCl

5. KI

6. CaO

Explanation:

In that order

The heat that is absorbed by the system is  1363 J. Option B

We know that in a chemical reaction that there could be the absorption or the evolution of heat. We say that there is the evolution of heat when heat has been lost from the system and there is the absorption of heat when heat has been gained by the system.

Number of moles of the barium hydroxide hydrate = 3.15 g/203 g/mol

= 0.015 moles

Number of moles of the ammonium thiocyanate = 1.52/76 g/mol

= 0.02 moles

If 1 mole of barium hydroxide hydrate reacts with 2 moles of  ammonium thiocyanate

0.015 moles of barium hydroxide hydrate reacts with 0.015 * 2 moles/1 mole

= 0.03 moles

Hence the limiting reactant is the ammonium thiocyanate.

Now the heat that is absorbed is;

H = mcdT

m = mass of the water

c = Heat capacity

dT = Temperature change

H = 100 * 4.20 * 3.1

H = 1363 J

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Answer:

diamond

sugar

rubber

salt (NaCl)

wood

ice

flour

Answer:

diamond

sugar

salt

ice

Explanation:

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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Significant figures correspond to the number of digits that a number contains. Zeros at the beginning and end of the number are not counted, only zeros are counted if they are in an intermediate position.

For this case, the number is written in scientific notation, the corresponding 10 of the scientific notation is not taken into account during the digit count, therefore the significant figures of this number will be:

Answer: So, in the number 4.150 x10^-4, there are 3 significant figures

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Answer:

The creation of regulations that limit timber activities and the exploitation of wood can prevent soil erosion in Troy.

Explanation:

The exploitation of the wood was an intense activity and that did not have any regulation that would limit its damages, caused by its exploratory activities.

As the timber market was totally undisciplined, the exploitation of the wood caused a strong deforestation, leaving the soil totally unprotected and susceptible to strong erosion.

Soil erosion has a very negative impact on the environment, requiring regulations to be made to prevent this from happening.

Based on this, we can say that one way to prevent environmental problems in the seaport of troy is by establishing laws and regulations that limit logging activities.

Answer:

The ecliptic.

is the correct answer

Enzymes are specialized proteins which can speed the reactions to a very great extent and thereby acts as efficient catalysts. The enzyme activity depends on pH and temperature.

The biological catalysts which catalyze the chemical reactions taking place inside the cells and are capable of acting independently on the cells are defined as the enzymes.

Enzymes catalyze and control several chemical reactions that occur in our living cells. They helps in digestion, liver function, breathing, reproduction, nerve function, etc. The enzyme urea catalyzes the hydrolysis of urea.

The enzyme activity is sensitive to the temperature changes. All the enzymes shows maximum catalytic activity at optimum temperature. They are found to be denatured by heat and hence their activity is destroyed at high temperatures.

Thus at high temperature the enzymes will be inactive and this will affect the vital organs and lead to death.

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If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.

The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.

According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:

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Answer:

10.66  grams

Explanation:

Answer:

..............what.......

The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. The pH scale is introduced by the scientist Sorensen. Here the given solution of pH 11.9 is basic.

The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. At 298 K, For pure water pH will be 7 and concentration of H₃O⁺ is 10⁻⁷M.

For a basic solution the pH will be greater than 7 and the concentration of H₃O⁺ will be less than  10⁻⁷M. For an acidic solution pH will be less than 7 and concentration of H₃O⁺ will be greater than 10⁻⁷M.

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A solution with a pH of 11.9 is considered a basic or alkaline solution.

This indicates a high concentration of hydroxide ions (OH-) in the solution. The pH scale is a measure of the acidity or basicity of a solution, ranging from 0 (most acidic) to 14 (most basic). A pH of 7 indicates a neutral solution, while a pH greater than 7 indicates a basic solution.

In practical terms, a solution with a pH of 11.9 could be found in various settings, such as in the alkaline batteries, household cleaning products, or industrial chemicals. Such a solution can be corrosive to metals and harmful to human skin and eyes. It is important to handle such solutions with care and appropriate protective equipment.

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The breakage of the anterior teeth occurs because of there is not enough setting time, also a bubble or void in pour also.

Imprints of  teeth, gums, and other oral structures are captured in dental impressions. They are used to make dental restorations, whitening products, trays, retainers, mouth guards, and more. They are also used to build diagnostic models of your mouth. Digital or conventional dental imprints are both possible.

Patients who are prone to oral candidiasis might incorporate the dental imprint technique into their treatment plans to help manage infection. The denture base's proper lip support and fit enable for improved recording of the maxillomandibular jaw connection as well as opportunities to get around the limitations of the traditional method.

Here, the removal of the impression from the model leads to the breakage of anterior teeth its because, there is not enough setting time, also a bubble or void in pour also.

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Answer: 2.34

Explanation:

pH= -log (H+)

H+ is the acid's M

pH= -log (0.0046) =2.34

The dark processes, a complicated series of enzymatically controlled chemical reactions, are what turn carbon into organic molecules. This word is rather misleading because these responses can occur in both light and darkness. As a result of extended darkness, some of the enzymes involved in the so-called dark processes become dormant; nevertheless, when the leaves that contain them are exposed to light, they become active.

The synthesis of intermediate sugar phosphates occurs in a cyclic process during the Calvin-Benson cycle, which involves the fixation, reduction, and use of carbon. Three molecules of carbon dioxide are used in a full cycle, which results in the production of one molecule of the three-carbon chemical glyceraldehyde-3-phosphate (Gal3P). Typically, the chloroplasts either export this three-carbon sugar phosphate or convert it to starch the chloroplast's inside.

The process of adding carbon dioxide to the five-carbon compound ribulose 1,5-bisphosphate (RuBP) and splitting the resulting six-carbon compound into two molecules of PGA is known as the initial incorporation of carbon dioxide, which is catalyzed by the enzyme ribulose 1,5-bisphosphate carboxylase (Rubisco). Each full turn of the cycle sees this reaction take place three times, resulting in the production of six PGA molecules.

First, we have to remember the equation that relates the wavelength with the frequency:

In which v is the wave speed, lambda is the wavelength and f is the frequency.

From this equation, we can reformulate it as:

Now, we know that the light speed is 3x108 m/s, so we can replace in the previous equation:

So, the answer is 502.51 nm

Answer:

the amount of a substance that will dissolve in a given amount of solvent.

Explanation:

Solubility is a term used to describe how readily a substance can be dissolved in a solvent to form a solution. Thus, a substance is said to be soluble if it dissolves completely in a solvent and insoluble if it doesn't dissolve or only dissolves partially.

For example, sodium chloride (NaCl) when mixed with water dissociates into sodium and chloride ions. Thus, salt (sodium chloride) is said to be soluble because it dissolves completely in water.

Furthermore, a compound that dissolves completely in water to produce an aqueous solution is said to be soluble in water.

In conclusion, solubility is simply the amount of a substance such as salt, that will dissolve in a given amount of solvent. A solvent is any liquid such as water, coffee, tea, etc., that dissolves a liquid, gaseous, or solid solute to produce a solution.

The molarity of the given stock solution is 0.02 M.

Molarity is the unit of concentration used for solution.

It is defined as the number of moles of solute per liter of solution.

The formula for molarity is given as: Molarity (M) = Number of moles of solute (n) / Volume of solution (V) in liters.

Here, we are given a stock solution having a density of 1.8 g/ml and 44% HCl. We are required to find the molarity of this solution.

To calculate the molarity, we need to first calculate the number of moles of solute present in the solution.

For that, we can use the formula:

Number of moles (n) = Mass (m) / Molar mass (Mm).

The molar mass of HCl is 36.46 g/mol (1 mole of HCl contains 1 mole of hydrogen and 1 mole of chlorine, which have atomic masses of 1.008 g/mol and 35.45 g/mol, respectively).

Let the mass of the solution be 'm'. Therefore, the mass of HCl present in the solution will be:

mass of HCl = 44% × mass of solution = 0.44m.

Since the density of the solution is 1.8 g/mL, we can find the volume of the solution as:

volume of solution = mass of solution / density

= m / 1.8 g/mL

= m / 1800 g/L.

Hence, the molarity of the solution can be calculated as:

Molarity = Number of moles of HCl / Volume of solution in liters

= (mass of HCl / Molar mass of HCl) / (volume of solution / 1000)

where volume of solution is divided by 1000 to convert mL to L.

Substituting the values, we get:

Molarity = (0.44m / 36.46 g/mol) / (m / 1800 g/L × 1000 mL/L)= (0.44 × 1800) / (36.46 × 1000)= 0.02 M.

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Answer:

C

Explanation:

You can’t round a phone number or Pin code

why would you round your birth year?