Lithium nitrate reacts with potassium sulfide to form potassium nitrate and lithium sulfide. What mass of potassium nitrate is produced when 0. 557 moles of potassium sulfide are used?

2 LiNO3 + K2S -> 2KNO3 + Li2S

The  dichloromethane (DCM) a good organic solvent to solubilize benzoic acid and acetanilide because of the polarity of dichloromethane.

The DCM is a good organic solvent because it is volatile and have the ability to dissolve a wide range of the organic compound. the solubility of the benzoic acid and the acetanilide  in the dichloromethane is due the polarity. the like dissolves like. the DCM is less polar solvent.

The DCM dissolves the non ionic compounds and the slightly polar compounds. the water is the polar compound and it dissolves the ionic compound and the polar compounds. this is the reason dichloromethane (DCM) a good organic solvent to solubilize benzoic acid and acetanilide.

To learn more about dichloromethane here

https://brainly.com/question/16831234

#SPJ4

Answer:

Refer to explanation

Explanation:

Weather is the main cause behind most short term environmental changes

For example, a period of heavy rain may lead to a pond overflowing, and flooding the nearby shrubbery

Animals in the area would adapt to this by trying to keep away from the flooded area until it dries out, once the rain ends

Answer: In CaF2, the oxidation number of Ca is +2

, and that of F is -1

. In H2SO4, the oxidation number of H is +1

, that of S is +6

, and that of O is -2

. In CaSO4, the oxidation number of Ca is +2

, that of S is +6

, and that of O is -2

. In HF, the oxidation number of H is +1

, and that of F is -1

Answer:

added to what? base? if its added to base then it will increase in pH. H2S04(sulphuric acid is strong) so the pH is ard 3

To convert the vapor pressure of water at 80 degrees Celsius from atm to kPa, you can use the following conversion factor: 1 atm = 101.325 kPa. So, the calculation would be:
0.468 atm × 101.325 kPa/atm ≈ 47.4 kPa
The vapor pressure of water at 80 degrees Celsius is approximately 47.4 kPa when rounded to 3 significant digits.

To convert atm to kPa, we can use the conversion factor of 1 atm = 101.325 kPa.
First, let's convert the given vapor pressure of water at 80 degrees Celsius from atm to kPa:
0.468 atm x (101.325 kPa/1 atm) = 47.39754 kPa
Rounding to 3 significant digits:
47.4 kPa
Therefore, the vapor pressure of water at 80 degrees Celsius is 47.4 kPa, rounded to 3 significant digits.
To know more about vapor pressure visit:

https://brainly.com/question/29640321

#SPJ11

Answer:

18 DAYS IS THE HALF LIFE OF THE RADIOISOTOPE.

Explanation:

Using the formula

Nt = No * (1/2)^t/t1/2

where;

Nt = amount remaining = 25 g

No = Initial amounrt of the radioisotope = 50 g

t = time elapsed = 18 days

t1/2 = half life = unknown

Substitute the values into the equation and obtain the half life of the radioisotope;

Nt = No * (1/2) ^t/t1/2

25 = 50 * (1/2) ^18/t1/2

25 /50 =  (1/2)^18/ t1/2

1/2 = (1/2)^18/t1/2

1/2)^1 = (1/2)^18/t1/2

1 = 18/t1/2

t1/2 = 18 days.

So therefore the half life of the radioisotope is 18 days.

Answer:

18 days

Explanation:

Did it on A pex

According to the stoichiometry and given chemical equation ,5.25 moles of oxygen are  used in the reaction to produce 3.5 moles of aluminium oxide.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

In the given chemical equation, 3 mole of oxygen produces 2 moles of aluminium oxide.

Therefore for 3.5 moles of of aluminium oxide to be  produced  3.5×3/2= 5.25 moles of oxygen are used.

Thus, 5.25 moles of oxygen were used in the reaction to produce 3.5 moles of aluminium oxide.

Learn more about stoichiometry,here:

https://brainly.com/question/28780091

#SPJ2

Answer:

naclo4+koh naoh+kclo4

Explanation:

if you know your cemestry

Answer:

it's A

Explanation:

Since water has a high specific heat, that results in water being able to store/require more energy in order to change it’s temperature. Since San Francisco is so close to water, that would mean that it’s temperature should vary less since water would be able to keep the temperature around the same value even if there was an increase or decrease in thermal energy.  

Answer:

a. H3SO4

Explanation:

The subscripts of the formula should match the amount of atoms of each element. Hope that helps with other questions!

The correct formula for three hydrogen (H), one sulfur (S), and four oxygen (O) is H3SO4.

The chemical formula of a compound depicts the constituent elements of that compound; including the number of atoms of each element present in the compound.

The number of atoms of each element in a compound is indicated as a subscript in front of the element.

According to this question, a compound consists of three atoms of hydrogen (H), one atom of sulfur (S), and four atoms of oxygen (O), this means that the chemical formula can be written as H3SO4.

Learn more about chemical formula at: https://brainly.com/question/4102170

Because of the pi bond, among alkenes, alkynes, and aromatic hydrocarbons, only alkenes exhibit cis-trans isomerism.

Because alkenes   molecules have a hard structure, cis-trans isomers are substances that have distinct configurations (groups that are permanently in different places in space). Cyclic compounds and alkenes can display cis-trans isomerism.

To know more about cis-trans isomers please click here ; https://brainly.com/question/2024652

#SPJ4

The synthesis of CH3CH2CH2CHO from two-carbon starting materials involves the formation of acetylene from calcium carbide and water, followed by hydrogenation to form ethane.

A chlorination reaction is a chemical reaction in which one or more chlorine atoms are introduced into a molecule, either in place of another atom or as an addition to the molecule. The general equation for a substitution chlorination reaction is:

RH + Cl2 -> RCl + HCl

One possible synthesis of CH3CH2CH2CHO, also known as butanal, from two-carbon starting materials is:

Step 1: Formation of acetylene (C2H2) from calcium carbide and water.

CaC2 + 2H2O -> C2H2 + Ca(OH)2

Step 2: Hydrogenation of acetylene to form ethane (C2H6).

C2H2 + 2H2 -> C2H6

Step 3: Reaction of ethane with chlorine (Cl2) to form 1-chloroethane (C2H5Cl).

C2H6 + Cl2 -> C2H5Cl + HCl

Step 4: Reaction of 1-chloroethane with sodium cyanide (NaCN) to form 1-cyanopropane (C3H7CN).

C2H5Cl + NaCN -> C3H7CN + NaCl

Step 5: Hydrolysis of 1-cyanopropane to form butanal (CH3CH2CH2CHO).

C3H7CN + 2H2O -> CH3CH2CH2CHO + NH3

To know more about Hydrolysis, visit:

brainly.com/question/29439050

#SPJ1

Answer:

5.954×10^23

Explanation:

mm=303.33 g/mol

mole=m/mm

=150/303.33

=0.4945

times by avagadros number=6.02×10^23

=2.977 ×10^23

×2 gold components

=5.954×10^23

Answer:

\(\boxed {\boxed {\sf 2.73 \ g \ He}}\)

Explanation:

We are asked to find the mass of helium gas given a volume.

1 mole of any gas occupies a volume of 22.4 liters. So, 1 mole of helium gas contains 22.4 liters of helium. Create a ratio using this information.

\(\frac {1 \ mol \ He }{ 22.4 \ L \ He}\)

We are converting 15.3 liters of gas to moles, so we multiply by that value.

\(15.3 \ L \ He *\frac {1 \ mol \ He }{ 22.4 \ L \ He}\)

The units of liters of helium (L He) cancel.

\(15.3 *\frac {1 \ mol \ He }{ 22.4}\)

\(\frac {15.3}{22.4} \ mol \ He\)

\(0.6830357143 \ mol \ He\)

The molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table as atomic masses, but the units are grams per moles. Look up the molar mass of helium.

Create another ratio using the molar mass.

\(\frac {4.0026 \ g \ He}{1 \ mol \ He}\)

Multiply by the number of moles we calculated.

\(0.6830357143 \ mol \ He *\frac {4.0026 \ g \ He}{1 \ mol \ He}\)

The units of moles of helium (mol He) cancel.

\(0.6830357143*\frac {4.0026 \ g \ He}{1 }\)

\(2.73391875 \ g \ He\)

The original measurement of volume has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredths place.

The 3 in the thousandths place to the right (2.73391875) tells us to leave the 3 in the hundredths place (2.73391875).

\(2.73 \ g \ He\)

15.3 liters of helium gas is approximately 2.73 grams of helium.

From 6.55 moles of Na₂SO₄ there is a mass of NaOH is 524 grams.

The balanced equation is.

CaSO₄ + 2NaOH --> Na₂SO₄ + Ca(OH)₂

From the balanced equation above,

1 mole of Na₂SO₄ will give 2 moles of NaOH.

because of that,

6.55 mol Na₂SO₄ will result from = 6.55 × 2 = 13.1 mol NaOH.

Then the mass of NaOH is:

Moles of NaOH = 5 moles

Molar mass of NaOH = 40 g/mol

So:

Moles = mass/molar mass

Mass of NaOH = 13.1 × molar mass

Mass of NaOH = 13.1 × 40

The mass of NaOH = 524 grams

So, the mass of NaOH is 524 grams.

Learn more about converting moles to mass at https://brainly.com/question/30458481.

#SPJ1

Answer:

1

Explanation:

Formula of molarity is

\(M=\frac{n}{v}\)

M= molarity

n= no of moles

v= volume in liters (if mL then you have to convert it to L)

Answer:

Charge is conserved due to the groups in which Lithium and Chlorine are located in the periodic table of the elements.

Explanation:

In the reaction \(Li + Cl - > LiCl\), we can examine the groups in which Li and Cl are found in the periodic table of the elements. Lithium appears in Group 1A, or the alkali metals group, indicating that it carries a charge of +1. Chlorine appears in Group 7A, or the halogen group, indicating that it carries a charge of -1. Because LiCl's constituent elements carry the same charges as previously mentioned, LiCl will have an overall charge of 0.

The chemical equation can then be rewritten as \(Li^{+} + Cl^{-} - > LiCl\), which, if looking at the individual charges of Li and Cl in lithium chloride, becomes \(Li^{+} + Cl^{-} - > Li^{+}Cl^{-}\). Adding the charges on the reactant and product sides of this chemical equation gives us zero in both locations, meaning that we have a charge of 0 on the reactant side and a charge of 0 on the product side. This indicates that charge is conserved in this reaction.

Another way to look at this is expressed in the valence electrons of Li and Cl. Li has an electron configuration of \(1s^{2}2s^{1}\), where the n = 2 electron shell has one of eight total electrons needed to fill the valence shell. This means that Li will easily lose one electron in order to have an electron configuration where the n = 1 electron shell is full, \(1s^{2}\), and become the \(Li^{+}\) ion. Similarly, Cl has an electron configuration of \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\) (or \([Ne]3s^{2}3p^{5}\)), meaning that the n = 3 electron shell is one electron away from becoming complete. Cl will easily gain one electron to have the electron configuration \([Ne]3s^{2}3p^{6}\) (or \([Ar]\)) in order to have an electron configuration where the n = 3 electron shell is full, \(3s^{2}3p^{6}\), and become the \(Cl^{-}\) ion. Thus, when Li and Cl bond, Li will lose the electron \([1, 0, 0, +\frac{1}{2}]\) and transfer it to Cl, where it will become the electron \([3, 1, 1, -\frac{1}{2}]\), thus conserving charge, as there is an equal total number of electrons before and after the reaction.

0.00355moles is the mass of this sample of hydrogen gas when A student has measured the volume of a sample of hydrogen gas and has found that she has a total of 5.02 moles of the gas.

The chemical element hydrogen is represented by the letter symbol H and atomic number 1. The lightest element of all is  is hydrogen.

Fuel cells may produce energy, power, and heat using hydrogen. The two industries where hydrogen is currently most widely employed are fertilizer manufacturing and petroleum refining, with the developing markets of utilities and transportation.

Given:

volume of gas 5.02 moles

temp=293.15 K

Pressure= 0.025

Now putting the values accordingly

5.02  x 0.025 / 293.15 x 8.314472 =0.00355moles

to know more about hydrogen gas  visit

https://brainly.com/question/13058224

#SPJ1

Answer:

The force of the atmosphere 200 KN.

Explanation:

Pressure is the ratio of force applied to the area  to which the force is applied.

i.e Pressure = \(\frac{Force}{Area}\)

But, Pressure = 100000 pa (100000 N/ \(m^{2}\)), and surface area = 2.0 \(m^{2}\)

Thus,

100000 = \(\frac{Force}{2.0}\)

⇒ Force = 100000 x 2.0

              = 200000

Force = 200 KN

The force of the atmosphere 200 KN.

If a bone is determined to have an activity of 3.80 cpm per gram of carbon, then the bone is 11,500 years old.

Carbon-14 has a half-life of 5730 years. The initial activity of a living organism is 15.2 counts per minute (cpm) per gram of carbon. In the case of the bone, the activity is 3.80 cpm per gram of carbon. To determine the age of the bone, we can use the formula:

N = N0 * (1/2)^(t / T)

where N is the current activity, N0 is the initial activity, t is the time in years, and T is the half-life of Carbon-14.

Rearrange the formula to solve for t:

t = T * log2(N0 / N)

Plug in the values:

t = 5730 * log2(15.2 / 3.8)

t ≈ 11,500 years

So, the bone is approximately 11,500 years old.

Learn more about half-life here: https://brainly.com/question/29599279

#SPJ11

When a small stream of cold water is run over the bottom of a Florence flask, the temperature of the flask decreases. As a result, the water vapor inside the flask condenses, turning from gas to liquid phase. This is observed as droplets forming on the inner surface of the flask.

Using the phase diagram of water, this phenomenon can be explained as follows:

1. Initially, the water vapor inside the flask is in the gaseous phase, as it's at a higher temperature and pressure compared to the cold water outside.
2. When the cold water stream contacts the flask, it causes the temperature of the flask's surface to decrease, which in turn lowers the temperature of the water vapor inside.
3. As the temperature of the vapor drops, it reaches the liquid-vapor equilibrium line on the phase diagram. This is the point where the vapor and liquid phases coexist at a specific temperature and pressure.
4. The water vapor then condenses into liquid droplets as it crosses the liquid-vapor equilibrium line, moving from the gaseous phase region to the liquid phase region on the phase diagram.

In summary, running a stream of cold water over the bottom of a Florence flask causes the water vapor inside to condense into liquid droplets, as explained by the phase diagram of water.

Learn more about flask here:

brainly.com/question/28389930

#SPJ11

Answer:

Explanation:

Kinetic energy is the energy in motion. Cooling if liquid would cause decreased temperature and hence slow down the oscillation of the particles.

Likewise, increased heat reduces the force of attraction between said particles, which allowed for their free movement. So the cooling would have opposite effect.

Finally, the space between the particles would remain the same as it was originally, as their force of attraction is increased in the cooling process, they would take the form they are held in.

I hope this was helpful and concise?

Answer:

c

Explanation:

if you count the last three digits from the back i.e. 6. 8, 4, 5. since it is to THREE significant figures. The next number is 6, and since 6 is greater than 5, you round it up to 7. The digits 8,4,5 will turn to 000.

Therefore 6845 = 7000

After 3.96 seconds, 0.549 mol/l of the compound is left. The rate constant of a reaction indicates how quickly reactants are being converted into products.

In this case, a rate constant of 0.0735 sec-1 means that 0.0735 moles of the compound react per second. To determine how much of the compound is left after 3.96 seconds, we can use the following equation:

ln([A]/[A]₀) = -kt

Where [A] is the concentration of the compound at time t, [A]₀ is the initial concentration (0.969 mol/l), k is the rate constant (0.0735 sec-1), and t is time (3.96 seconds).

Solving for [A], we get:

[A] = [A]₀ e^(-kt)

Plugging in the values, we get:

[A] = 0.969 mol/l e^(-0.0735 sec-1 * 3.96 sec)

[A] = 0.549 mol/l

Therefore, after 3.96 seconds, 0.549 mol/l of the compound is left.

learn more about the reaction here

https://brainly.com/question/30464598

#SPJ11

Cold water dissolves CO2 significantly more easily than hot water. Most soda makers propose a temperature of 45°F (approximately 8°C), at 2.2 quarts (1 litre) of water absorb around 0.1 ounces (3 grammes) of CO2.

Since it readily dissolves into a liquid, especially soft drinks, and produces tiny bubbles, carbon dioxide is indeed a fantastic choice for usage in soda products. Also, the CO2 acts as a safeguard to preserve the soft drink and stop bacterial growth while it is being stored.

The pressure must continue for the water to carbonate. The beverage will flatten out much more quickly if you use hot water. This is due to the fact that CO2 molecules, like all other molecules, are far more active and may escape much more readily in hotter environments.

To know more about soda visit:

https://brainly.com/question/29771586

#SPJ1

To determine the pH of a solution using a pH indicator paper, you need a color chart or a color scale that corresponds to different pH values.

This color chart or scale is used to compare the color of the pH indicator paper after it has been immersed in the solution. The pH indicator paper is impregnated with a universal pH indicator, which is a chemical compound that changes color depending on the acidity or alkalinity of the solution.

The indicator undergoes a chemical reaction with the hydrogen ions (H+) or hydroxide ions (OH-) present in the solution, resulting in a color change.

By comparing the color of the pH indicator paper with the color chart or scale, you can determine the approximate pH of the solution. The color chart usually provides a range of colors corresponding to different pH values, allowing you to match the observed color to the nearest pH value.

In the hypothesis mentioned, the aim is to calibrate a cabbage pH indicator using the pH values obtained from a universal pH indicator. Therefore, in addition to the pH indicator paper and color chart, you would also need a range of solutions with known pH values to establish a calibration curve specific to the cabbage pH indicator.

In summary, to determine the pH of a solution using a pH indicator paper, you need a color chart or scale that correlates the observed color of the pH indicator paper with different pH values. This chart or scale serves as a reference for interpreting the color change and determining the pH of the solution.

Know more about   hypothesis  here:

https://brainly.com/question/31293943

#SPJ8

Answer: COLOR KEY

Explanation: CS

Answer:

fttttggttfvvgfrr ccsfgt chg chu rdh fig ffhfr

Answer:

To solve this problem, you'll need the formula that relates heat energy to mass and heat of fusion:

q = m·ΔHf

where

q = heat energy

m = mass

ΔHf = heat of fusion

Explanation:

62.3J ÷ 7.3g = ΔHf

8.53 J/g = ΔHf

4.18 cal/g = ΔHf