A concentrated stock solution has molarity of 5 M. Calculate the volume (in mL) of the stock solution
needed to make 584 mL of 1.61 M diluted solution.

Answer:

pH = 10.113

Explanation:

Here, we can find pOH first:

pOH = \(-log([OH^-])\) = 3.886.

Then, we can find pH which is 14 - pOH. We then get the answer above.

Then, we can find pH which is 14 - pOH. We then get the answer above.

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Thus the pH of 1.3×10⁻⁴  M  bleach solution is 10.62.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7

The concentration of bleach solution  is 1.3×10⁻⁴ M

Concentration of OH⁻=1.3×10⁻⁴ M

Mathematically,

pOH=-log[OH⁻]

Substituting the values

pH=-log[1.3×10⁻⁴]

    =  3.886.

pH+ POH=14

pH=14-3.886.=10.62

Therefore,  the pH of 1.3×10⁻⁴  M  bleach solution is 10.62.

To learn more about pH, here:

https://brainly.com/question/27945512

#SPJ3

In an aqueous solution of ethanol, C₂H₅OH, the molecules that would be present in the solution are ethanol molecules and water molecules.

Aqueous solutions are solutions containing water as the solvent of the solution.

An aqueous solution simply means dissolved in water.

When dissolved in water, ionic compounds dissociate to form ions in aqueous solutions.

Other polar solutes which are non-ionic will simply dissolve in water as a result of the interaction of the polar ends of the molecules. However, no ions will be formed by these polar non-ionic solutes.

For example, a solution of ethanol in water is a non-ionic aqueous solution.

Learn more about aqueous solutions at: https://brainly.com/question/24658038

#SPJ1

Answer:

2.79mol of FeCl3

solving:

formula to find given mol to b mol:

given a mol * b mol in reaction / a mol in reaction = answer

solving:

2.79mol * 2mol FeCl / 2mol Cl = 2.79mol FeCl3

Answer:

Calculate the number of moles of NaOH:

molar mass of NaOH = 23.0 g/mol (Na) + 16.0 g/mol (O) + 1.0 g/mol (H) = 40.0 g/mol

moles of NaOH = mass / molar mass = 28.1 g / 40.0 g/mol = 0.7025 mol

Use stoichiometry to determine the number of moles of Na2SO4 produced:

From the balanced chemical equation, we see that 2 moles of NaOH react to form 1 mole of Na2SO4, so:

moles of Na2SO4 = 0.7025 mol NaOH × (1 mol Na2SO4 / 2 mol NaOH) = 0.35125 mol Na2SO4

Therefore, 28.1 g of sodium hydroxide will produce 0.35125 mol of sodium sulfate.

Explanation:

Answer:

The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.

Explanation:

The temperature change of a substance when it absorbs or loses energy can be calculated using the specific heat capacity of the substance. The specific heat capacity of water is approximately 4.18 J/(g°C), which means that it takes 4.18 joules of energy to raise the temperature of 1 gram of water by 1 degree Celsius.

To calculate the temperature change of the water sample when 50 joules of energy is added, we need to use the following equation:

q = m * c * ΔT

where q is the amount of energy absorbed by the water, m is the mass of the water sample, c is the specific heat capacity of water, and ΔT is the resulting temperature change.

Rearranging the equation to solve for ΔT, we get:

ΔT = q / (m * c)

Plugging in the values, we get:

ΔT = 50 J / (m * 4.18 J/(g°C))

We need to know the mass of the water sample to calculate the temperature change. Let's assume a mass of 10 grams:

ΔT = 50 J / (10 g * 4.18 J/(g°C))

ΔT = 1.2°C

Therefore, if 50 joules of energy is added to a 10-gram sample of water, the resulting temperature change will be approximately 1.2 degrees Celsius.

Answer: 4.5 moles

Explanation:

To understand how to solve this problem, you must understand the ratios written in this chemical equation.

The equation shows that 4 moles of Al forms 2 moles Al₂O₃. This creates the ratio 2:4 or \(\frac{2}{4}\)

To solve, you can set the two ratios to each other and cross multiply.

\(\frac{2}{4} = \frac{x}{9}\)

18 = 4x

x = 4.5 mol Al₂O₃

*both \(\frac{2}{4}\) and \(\frac{4.5}{9}\) can be simplified as \(\frac{1}{2}\), which verifies your answer*

Answer:

your answer would be C

Explanation:

atoms that picks up the extra electron becomes a negatively charged ion (anion)

if we reverse that,

it would be a positively charged ion due to losing an electron

Answer: \(Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)\)

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced molecular equation is:

\(Pb(NO_3)_2(aq)+2KI(aq)\rightarrow PbI_2(s)+2KNO_3(aq)\)

Answer:

quartz

Explanation:

The correct option would be quartz.

Allotropy is a phenomenon that describes the natural existence of the same element in different forms with different physical characteristics. Allotropes are therefore different forms of the same element.

Carbon as an element has several allotropes which include diamond, graphite, graphene, amorphous carbon, and fullerenes. Quartz is a crystalline solid that is composed of silicon dioxide and not carbon.

Hence, all the options are carbon allotropes except quartz.

Answer:

it would dry up

Explanation:

CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen.

Intermolecular forces determine bulk properties, such as the melting points of solids and the boiling points of liquids.

Liquids boil when the molecules have enough thermal energy to overcome the intermolecular attractive forces that hold them together, thereby forming bubbles of vapor within the liquid.

CO₂ have a higher boiling point than CH₄ when they both possess dispersion forces because CO₂ consists of polar bonds between carbon and oxygen. The polarity increases the boiling point of the molecule.

Learn more about Intermolecular forces, here:

https://brainly.com/question/31797315

#SPJ1

Answer:

The mass is 63.1 grams.

Explanation:

ck-12 said it was correct.

→The answer is True, because the mass lost gets converted into energy, and can be calculated using the formula , E = mc2.

Answer:

700 calories

Explanation:

Using the formula below:

Q = m × c × ∆T

Where;

Q = amount of heat required (calories)

m = mass of substance (g)

c = specific heat of substance (cal/g°C)

∆T = change in temperature (°C)

According to this question, the following information was provided;

Q = ?

m = 20g

c = 1.0 cal/g °C

∆T = 40°C - 5°C = 35°C

Using the formula; Q = m × c × ∆T

Q = 20 × 1 × 35

Q = 700 calories

Hence, 700 cal of heat energy is needed to raise 20 g of H2O from 5°C to 40°C.

TT with Tt

or TT with TT

would give a tall plant

This indicates that the chemical characteristics of all alkali metals are comparable. H 2 2KOH(aq) + 2K(s) + 2H 2 O(l) (g) All group 1 element reactions follow this pattern equation.

Magnesium is oxidised during the formation of magnesium oxide from the reaction of magnesium metal with oxygen. equation. The phrase "reduction" E-'s on the right side of the equation indicate an oxidation process. 2. Review: Redox Reaction Balancing. For instance, F-(aq) + Al3+ = F2(g) + Al(s) (aq) In order to link the amount of Cl2 to the amount using the balanced chemical equation, AlCl3 has a molar mass of 133.33 g/mol, which we must invert to obtain In the area of chemistry known as stoichiometry, relationships between the reactants and/or products of a chemical reaction are used. Reactions in chemicals. 2 H2(g) + O2(g) (g)

To learn more about equation  please click on below link

https://brainly.com/question/21620502

#SPJ4

Answer:

C₅H₈NO₄Na

Explanation:

Step 1: Given data

Step 2: Divide each percentage by the atomic mass of the element

Na: 13.6/22.99 = 0.592

C: 35.5/12.01 = 2.96

H: 4.8/1.01 = 4.75

N: 8.3/14.00 = 0.592

O: 37.8/16.00 = 2.36

Step 3: Divide all the number by the smallest one, i.e. 0.592

Na: 0.592/0.592 = 1

C: 2.96/0.592 = 5

H: 4.75/0.592 ≈ 8

N: 0.592/0.592 = 1

O: 2.36/0.592 ≈ 4

The empirical formula of MSG is C₅H₈NO₄Na.

Answer:

electrons :)

Explanation:

Answer:

electrons

Explanation:

Answer:

here are some ideas <3

Explanation:

burning of paper.

cooking of food

burning of wood

rotting of fruits.

frying egg

rusting of iron

mixing acid and base.

burning of candle

leaves changing color

melting of sugar.

baking

explosion of fireworks.      

souring milk

digestion of food

fermentation

lighting matchstick

photosynthesis

decomposition of waste

Given elements:

Cl, Ne, Ge, Ca and Se

Chemistry -> The periodic table -> Periodic Trends: Ionization Energy

The ionization energy refers to the amount of energy needed to remove an electron from the valence shell of an atom.

Ionization energy increases as we go across a period and increases as we go up a group. This tred happens due to atomic radius, atomic number, electronegativy, among other properties.

Let's separate the period and group of each atom so we can predict the order of ionization energy.

Cl: Period 3 Group 17

Ne: Period 2 Group 18

Ge: Period 4 Group 14

Ca: Period 4 Group 2

Se: Period 4 Group 16

From the trend, we know that the atom that is higher and to the far right in the periodic table will have the greatest ionization energy. So, Ne that is in the 2nd period and 18th group will have the highest ionization energy.

Followed by Cl, since it is clores to Ne than the rest.

Then among the elements in the 4th period, we just have to analyse by their group. Se is farther to the right than Ge that is farther to the right than Ca.

In conclusion, the order by increasing ionization energy will be:

Final answer:

Ca < Ge < Se < Cl < Ne

Answer:

2Na + FeCl2 → 2NaCl + Fe (sodium)

Explanation:

Answer:

a. C > F > Cl

Explanation:

We know that atomic mass of Chlorine is greater than of  Florine than that of carbon. Moreover, in CF2Cl2, therefore, there are two atoms of Cl, F and one atom of C. Therefore, in CF2Cl2 in order of decreasing mass percent composition C > F > Cl. Therefore, the correct option is a.

Answer:

The number of particles in the 41.8g sample of Bismuth is 12.044 × 10²³.

Explanation: Bismuth atomic mass ≈ 209u. Molar mass of Bismuth

4

There are 1.20 × 10²³ atoms of Bi are there in a 41.8 g sample.

First, we have to convert 41.8 g to moles using the molar mass of Bi (208.98 g/mol) as the conversion factor.

\(41.8 g \times \frac{1mol}{208.98g} = 0.200 mol\)

Next, we will convert 0.200 moles to atoms using Avogadro's number (6.02 × 10²³ atoms/mole) as the conversion factor.

\(0.200 mol \times \frac{6.02 \times 10^{23} atoms }{mol} = 1.20 \times 10^{23} atoms\)

There are 1.20 × 10²³ atoms of Bi are there in a 41.8 g sample.

You can learn more about Avogadro's number here: https://brainly.com/question/13302703

Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand.

In a longitudinal wave, the compression zone is where the particles are closest to one another. In a longitudinal wave, a rarefaction occurs where the particles are the furthest distant from one another.

Compression refers to the area where the medium is compressed, and rarefaction refers to the area where the medium is spread out.

Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand.

Learn more about compression, here:

https://brainly.com/question/1326823

#SPJ1