Sodium hypochlorite solution, sold as chlorine bleach, is potentially dangerous because of the basicity of ClO⁻, the active bleaching ingredient. What is [OH⁻] in an aqueous solution that is 6.5% NaClO by mass? What is the pH of the solution? (Assume that d of the solution is 1.0 g/mL.)

The exercises refer to hydrocarbons. Depending on the type of bond, it will be the termination of the name of the molecule.

For a single bond: End with the suffix -ane

For double bond: Ends in -ene

For triple bond: Ends in -yne

Let's look at each particular case

a) Heptene

Hept- means 7 carbons, so we have a compound with 7 carbons and one double bond. The formula will be:

c)Hexane

6 carbons with a simple bond

d)Pentane

5 carbons with a simple bond

e)Propyne

3 carbons with a triple bond

A neon sign contains 2.01 x 10^25 atoms of gas. 3.34 x 10^-3 moles of neon are in the sign.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

1 mole is equal to 6.023 × 10 ²³ molecules.

According to Avogadro's constant, in one mole, there are 6.02 x 10^23 atoms.

To calculate how many moles are in 2.01 x 10^21 atoms, you would divide it by the amount of atoms that fit in a mole.

2.01 x 10^21 atoms / 6.02 x 10^23

= 0.00334 moles,

= 3.34 x 10^-3 moles

Thus, A neon sign contains 2.01 x 10^25 atoms of gas. 3.34 x 10^-3 moles of neon are in the sign.

To learn more about the mole, follow the link;

https://brainly.com/question/26416088

#SPJ1

Your question is incomplete, most probably your question was

A neon sign contains 2.01 X 1021 atoms of the gas. How many moles of neon are in the sign?

a1.21 X 1045 mole Ne

b3.34 X 10-3 mole Ne

c2.00 X 102 mole Ne

d12.10 X 102 mole Ne

Recrystallization ; 25 mL of solvent are needed at 100 oC to dissolve 100 mg of the chemical. 75 mg of the chemical will precipitate at 0 oC while 25 mg will remain in solution.

The chemical compound para nitroacetanilide, commonly known as 4-nitroacetanilide, is a nitroacetanilide derivative made from acetanilide and a nitrating combination. A trace of ortho product also forms along with the para product.

Through nitration, the chemical molecule p-nitroacetanilide is created from acetanilide. P-nitroacetanilide is created when acetanilide is treated with a nitrating mixture, which is a combination of nitric acid and sulfuric acid. O-nitroacetanilide is also generated as a small byproduct along with p-nitroacetanilide. It is quite simple to separate p-nitroacetanilide through crystallization since o-nitroacetanilide is highly soluble in alcohol.

Because ethanol is endlessly cosoluble with water and has high dissolving properties for many organics, ethanol and water mixtures are frequently utilized. Many organic compounds' solubilities can be drastically and quickly decreased by the addition of water, which can cause crystallization.

The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. Smaller crystals will be produced as a result.

To know more about Recrystallization please click here ; https://brainly.com/question/28588509

#SPJ4

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


To learn more about molarity click here: brainly.com/question/31545539

#SPJ11

Answer:

Normal cells are either repaired or die (undergo apoptosis) when they are damaged or get old. Cancer cells are either not repaired or do not undergo apoptosis.

Explanation:

Answer: a beating heart,emotions,pain

Explanation:

Answer:

perform multiple trials for each release height instead of just one

Explanation:

Answer: D. Investigation 4

Answer:

Investigation D

Explanation:

Elements that are in the same group have the same number of electrons in their outer shell. These outer electrons are so important in determining the chemical properties of an element that a special way to represent them has been developed. A(n) electron dot diagram uses the symbol of the element and dots to represent the electrons in the outer shell.

The elements in the same group have the same number of electrons in their outer shell because they have the same number of valence electrons. These valence electrons are responsible for the chemical properties of an element, which is why elements in the same group have similar chemical properties. The symbol of the element is used in the electron dot diagram to represent the element, and the dots are used to represent the valence electrons in the outer shell. This diagram is a useful tool for understanding the chemical behavior of an element and for predicting how it will react with other elements.

You can learn more properties of elements at: brainly.com/question/30388913

#SPJ11

Answer:

sulfur 31  = S

Explanation:

Explanation:

We have to balance the following equation:

__ H₂O + __ F₂ -------> __ HF + __ O₂

First we have to determine the number of atoms of each element that we have on both sides of the equation.

__ H₂O + __ F₂ -------> __ HF + __ O₂

O: 1 O: 2

H: 2 H: 1

F: 2 F: 1

We have 2 atoms of O on the right side and 1 atom of O on the left side. To balance the O atoms we can change the coefficient for H₂O and write a 2 in front of it.

2 H₂O + __ F₂ -------> __ HF + __ O₂

O: 2 O: 2

H: 4 H: 1

F: 2 F: 1

Then we have 4 atoms of H on the left and 1 atom of H on the right side of the equation. We can change the coefficient for HF to balance the H atoms.

2 H₂O + __ F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 2 F: 4

And finally we have 2 atoms of F on the left and 4 atoms of F on the right. We can change the coefficient for F₂ and write a 2 there.

2 H₂O + 2 F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 4 F: 4

The equation is balanced.

Answer: 2 H₂O + 2 F₂ -------> 4 HF + O₂

Answer: A saturated solution, by definition, contains an amount of solute equal to the amount of dissolved solute in equilibrium with an undissolved solute. We could, however, make a supersaturated solution in which the solvent contains more solute than would be in equilibrium with undissolved.

Explanation:   More solute cannot be dissolved at a given temperature in a saturated solution. This is because the solute dissolves in a solvent due to the space between the solvent particles, but with the continuous addition of solute, the space between the solvent particles is filled. As a result, no more solute particles can dissolve in the solvent.

Answer:

saturated

Explanation:

Answer:

Protium

Explanation:

The hydrogen atom is the simplest of all atoms: it consists of a single proton and a single electron. In addition to the most common form of the hydrogen atom that is called protium, two other isotopes of hydrogen exist deuterium and tritium.

Answer: Hydrogen is a atom of the chemical element hydrogen.

Explanation:

(b)

only CaCO3

Explanation:

Given:

Alkaline solution= 2 x 10^-4 M in CO32-Pool water was originally 4 x 10^-3 M in Mg2+, 6 x 10^-4 M in Ca2+ and 8 x 10^-7 M in Fe2+

Precipitate should be of:

MgCO3, CaCO3 and FeCO3

We know that:

Mg2+ + CO32- → MgCO3Ca2+ + CO32- → CaCO3Fe2+ + CO32- → FeCO3Thus, for MgCO3 to form, [CO32-] should be 4 x 10^-3 M which is not possible in the given question.

For CaCO3 to form,[CO32-] should be 6 x 10^-4 M which is possible.

So, precipitate should be only CaCO3.

to know more about the CaCO3 https://brainly.com/question/29792038

#SPJ11

An element is a pure substance made up of only one type of atom and has consistent physical and chemical properties.

An element is best described as a material consisting of only one type of atom. This means that the atoms of an element all have the same number of protons in their nuclei. Each element has a unique atomic number, which is the number of protons in its nucleus.

An element is pure because it contains only one type of atom. Elements have consistent physical and chemical properties. Physical properties include things like melting point, boiling point, density, and color. Chemical properties include things like reactivity, flammability, and ability to form compounds with other elements.The unique physical and chemical properties of elements are due to the arrangement of their atoms and the interactions between those atoms. These properties can be used to identify elements and to predict how they will behave in different situations.

To know more about element visit:

https://brainly.com/question/30858299

#SPJ11

Answer:The 7 diatomic elements are hydrogen (H), nitrogen (N), oxygen (O), fluorine (F), chlorine (Cl), bromine (Br), and iodine (I).We call them diatomic elements because the atoms appear in pairs. The chemical formulas for these elements are H2, N2, O2, F2, Cl2, Br2, and I2.The diatomic elements are easy to find on the periodic table. They include the halogens (F, Cl, Br, I) plus O and N. These elements are touching on the periodic table. Hydrogen is apart from the other diatomics on the periodic table.

Explanation:

The thermal efficiency of the heat engine is 22.86%.

The thermal efficiency of a heat engine is defined as the ratio of the net work output to the heat input. It can be calculated using the formula:

Thermal Efficiency = (Net Work Output / Heat Input) * 100

In this case, the net work output is given as 2.4 kJ, and the heat input is the sum of the net work output and the heat rejected, which is 2.4 kJ + 8.3 kJ = 10.7 kJ. Plugging these values into the formula:

Thermal Efficiency = (2.4 kJ / 10.7 kJ) * 100 = 22.43%

Therefore, the thermal efficiency of the heat engine is approximately 22.86% when rounded to two decimal places. This indicates that only 22.86% of the input heat is converted into useful work, while the remaining percentage is lost as waste heat

Learn more about thermal efficiency here

brainly.com/question/32315291

#SPJ11

Answer:

Figure 1 provides the rawest and most accurate data.

Explanation:

Answer:

Figure 1 provides the rawest and most accurate data.

Explanation:

Guy above me is right.

Answer:

Number of moles = 0.125 mol

Explanation:

Given data:

Mass of calcium = 5.00 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of calcium = 40 g/mol

By putting values,

Number of moles = 5.00 g/ 40 g/mol

Number of moles = 0.125 mol

The balanced chemical equation for the reaction between nitrogen and oxygen is as:

2N₂ (g) + 2O₂ (g) —> 4NO (g)

The following is the equation that can be written to describe the relationship between nitrogen and oxygen:

    N₂(g) + O₂(g) —> NO (g)

The equation that was just discussed can be balanced in the following way: On the left side, there are two atoms of oxygen, whereas, on the right side, there is only one. To achieve equilibrium, write 2 in front of NO, as seen in the following example:

   N₂(g) + O₂(g) —> 2NO (g)

When we multiply the equation by 2, we get the following:

    2N₂(g) + 2O₂(g) —> 4NO (g)

The equation is balanced now.

You can also learn about chemical equations from the following question:

https://brainly.com/question/28294176

#SPJ4

Answer:

Mass of excess reactant left = 179.6 g

Limiting reactant = nitrogen

Mass of ammonia formed = 200.6 g

Explanation:

Given data:

Mass of nitrogen = 165.0 g

Mass of hydrogen = 215.0 g

Limiting reactant = ?

Mass of ammonia formed = ?

Mass of excess reactant left = ?

Solution:

Chemical equation:

N₂ + 3H₂    →     2NH₃

Number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 165.0 g/  28 g/mol

Number of moles = 5.9 mol

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 215.0 g/  2 g/mol

Number of moles = 107.5 mol

Now we will compare the moles of ammonia with both reactant.

                  H₂      :      NH₃

                   3        :       2

                  107.5  :      2/3×107.5 = 71.7 mol

                   N₂      :      NH₃

                    1        :       2

                  5.9      :      2/1×5.9 = 11.8 mol

Less number of moles of ammonia are formed by the nitrogen it will act as limiting reactant.

Mass of ammonia formed:

Mass = number of moles × molar mass

Mass = 11.8 mol × 17 g/mol

Mass = 200.6 g

Mass of hydrogen left:

We will compare the moles of hydrogen and nitrogen.

               N₂         :        H₂

                1           :          3

               5.9        :         3/1×5.9 = 17.7 mol

Out of 107.5 moles 17.7 moles of hydrogen react with nitrogen.

Number of moles left unreacted = 107.5 - 17.7 mol = 89.8 mol

Mass of hydrogen left:

Mass = number of moles × molar mass

Mass = 89.8 mol × 2 g/mol

Mass = 179.6 g

In scientific investigations, the effect of fertilizer on plant growth can be studied by examining various variables. Two key variables in this context are the presence or absence of fertilizer (independent variable) and the size or growth of the plant (dependent variable).

When investigating the effect of fertilizer on plant growth, the independent variable is the presence or absence of fertilizer. This variable is controlled by having two groups of plants: one group receiving fertilizer (experimental group) and another group without fertilizer (control group). By comparing the growth of these two groups, we can determine the impact of fertilizer on plant size.

The dependent variable, on the other hand, is the size or growth of the plant. This variable is measured or observed as the outcome of interest. In this case, it would be the height, weight, or overall size of the plants.

By systematically changing the independent variable (presence or absence of fertilizer), we can observe how it affects the dependent variable (plant growth). The experimental group receiving fertilizer is expected to show greater plant growth compared to the control group without fertilizer. This allows us to draw conclusions about the effect of fertilizer on plant growth.

However, it is important to note that the specific outcome may vary depending on other factors such as plant species, soil conditions, and environmental factors. Conducting a controlled experiment while considering these factors helps in obtaining more reliable results.

learn more about fertilizer here

https://brainly.com/question/14012927

#SPJ11

Answer:

International system of units

Explanation:

Answer:

a) To determine the limiting reactant, we need to compare the amount of product that can be produced by each reactant. To do this, we need to convert the mass of each reactant to moles.

For C3H7OH:

moles = mass / molar mass = 8 g / 60.1 g/mol = 0.133 mol

For O2:

moles = mass / molar mass = 4 g / 32 g/mol = 0.125 mol

According to the balanced equation, 2 moles of C3H7OH react with 9 moles of O2 to produce 6 moles of CO2. Therefore, for 0.133 mol of C3H7OH, we need:

moles of O2 = (9/2) x 0.133 mol = 0.597 mol

Since we only have 0.125 mol of O2, it is the limiting reactant. Therefore, O2 is the limiting reactant.

b) C3H7OH is the excess reactant.

c) Using the balanced equation, we can see that 2 moles of C3H7OH react with 9 moles of O2 to produce 6 moles of CO2. Therefore, for 0.125 mol of O2, we can produce:

moles of CO2 = (6/9) x 0.125 mol = 0.083 mol

d) The molar mass of CO2 is 44.01 g/mol. Therefore, the mass of CO2 produced is:

mass of CO2 = moles of CO2 x molar mass of CO2

mass of CO2 = 0.083 mol x 44.01 g/mol = 3.65 g

e) To calculate how much excess reactant is used, we need to first determine how much of the excess reactant is present:

moles of C3H7OH = mass / molar mass = 8 g / 60.1 g/mol = 0.133 mol

moles of C3H7OH needed = (2/9) x moles of O2 = (2/9) x 0.125 mol = 0.028 mol

mol of excess C3H7OH = moles of C3H7OH present - moles of C3H7OH needed

mol of excess C3H7OH = 0.133 mol - 0.028 mol = 0.105 mol

moles of O2 needed = (9/2) x mol of excess C3H7OH = (9/2) x 0.105 mol = 0.473 mol

moles of O2 used = moles of limiting reactant = 0.125 mol

moles of excess C3H7OH used = (1/2) x moles of O2 used = (1/2) x 0.125 mol = 0.0625 mol

f) To calculate how much excess reactant remains, we need to subtract the moles of excess reactant used from the initial moles of excess reactant:

mol of excess C3H7OH remaining = 0.105 mol - 0.0625 mol = 0.0425 mol

The mass of excess reactant remaining can be calculated as follows:

mass of excess C3H7OH remaining = mol of excess C3H7OH remaining x molar mass of C3H7OH

mass of excess C3H7OH remaining = 0.0425 mol x 60.1 g/mol = 2.55

1.0 L buffer solution initially contains 0.25 mol of NH₃  and 0.25 mol of NH₄Cl.  to adjust the buffer pH to 8.75,  we should add HCl . The mass of reagent is 4.51 g.

given that :m

volume of buffer solution = 1 L

number of moles of NH₃ = 0.25 mol

number of moles of NH₄Cl = 0.25 mol

pH = 8.75

Molarity of NH₃ and NH₄Cl is as follows:

Molarity = number of moles / volumes in L

Molarity = 0.25 / 1

Molarity = 0.25 M

pKa for  NH₄Cl = 9.25

now the pH expression is given as :

pH = pKa + log ( 0.25 / 0.25 )

pH = 9.25 + log 1

pH initial = 9.25

now from the question pH needs to be 8.75. that means we have to reduce the pH.

new concentration  A⁻ = 0.25 - x

                                HA= 0.25 + x

pH = pKa + log ( base / acid )

8.75 = 9.25 + log ( (0.25 - x ) / ( 0.25 + x))

-0.5 = log ( (0.25 - x ) / ( 0.25 + x))

0.316 = ( (0.25 - x ) / ( 0.25 + x))

x = 0.124 M

to decrease the pH , we have increase the H⁺ ion concentration. so we should add HCl in a buffer solution.

number of moles of hydronium ion = 0.124 × 1

                                                          = 0.124 mol

molar mass of HCl = 36.45 g/mol

mass of HCl = moles × molar mass

                     = 0.124 × 36.45

                     = 4.51 g mass of reagent.

Thus, 1.0 L buffer solution initially contains 0.25 mol of NH₃  and 0.25 mol of NH₄Cl.  to adjust the buffer pH to 8.75,  we should add HCl . The mass of reagent is 4.51 g.

To learn more about buffer solution here

https://brainly.com/question/19952944

#SPJ4

Answer:

this means that the movement of the galaxies in the universe are stretching and are getting bigger and the frequency of the light waves are decreasing because the wider something gets like galaxies and stuff like that that gives off light are stretching so it will become dimer because it is trying to stretch to wider surroundings and that means the light has to stretch to so the light has to cover bigger surfaces and the light can not get brighter so it has to stretch and dim its light.

Explanation:

Liquefaction is most likely to occur in areas with loose, sandy soil that is saturated with water. When an earthquake occurs, the shaking of the ground can cause the soil to lose its strength and stiffness, causing it to behave like a liquid instead of a solid. This can result in buildings and other structures sinking or even toppling over.

Of the areas listed in the question, the coast of California is the most likely to experience liquefaction due to its proximity to active fault lines and the high likelihood of earthquakes. The region is known for experiencing frequent seismic activity, including the devastating 1906 San Francisco earthquake that caused widespread liquefaction and significant damage to buildings and infrastructure.

However, it is important to note that liquefaction can occur in other areas as well, particularly those with loose or sandy soil that is saturated with water. The coast of Alaska, for example, is also prone to liquefaction due to its location on the Pacific Ring of Fire, an area of high seismic activity. Ultimately, the risk of liquefaction depends on a variety of factors, including the type of soil, the degree of saturation, and the intensity and duration of the earthquake.

Learn more about Liquefaction  here:-

https://brainly.com/question/31610035

#SPJ11

The anion that is a common buffer in urine and an important intracellular buffer against pH changes is HPO4 2- (hydrogen phosphate).

In urine, the pH can vary widely depending on factors such as diet, hydration, and health status. HPO4 2- acts as a buffer in urine by accepting or donating hydrogen ions (H+) as needed to maintain the pH within a normal range of around 4.5 to 8.0.

Within cells, HPO4 2- along with its conjugate acid, H2PO4 -, helps to regulate the pH of the cytoplasm and other intracellular compartments. This is important because many cellular processes are sensitive to changes in pH, and maintaining a stable pH is essential for proper cellular function. HPO4 2- can accept or donate H+ ions to help neutralize excess acids or bases and maintain the pH within a narrow range.

Other important intracellular buffers include proteins such as hemoglobin and albumin, as well as the bicarbonate (HCO3-) buffer system.

Visit to know more about Anion:-

brainly.com/question/28971609

#SPJ11

Answer:

C: Ability to react. Sorry if its wrong!

Explanation: