Describe the steps that would need to be taken in order to create 1 L of a 5 M solution of LiBr in your lab. Be specific. Show all work

Answer:

Explanation:

B

The prepare a 0.120 M aqueous solution of silver fluoride (Gf) using a 300 mL volumetric flask, follow these steps Calculate the number of moles of silver fluoride needed Molarity M = moles of solute / volume of solution in liters
Rearrange the equation.

The find the moles of solute moles of solute = Molarity (M) × volume of solution in liters moles of Gf = 0.120 M × 0.300 L = 0.036 moles Calculate the mass of silver fluoride required Mass (g) = moles × molar mass of Gf The molar mass of Gf = 108 g/mol (Ag) + 19 g/mol (F) = 127 g/mol Mass of Gf = 0.036 moles × 127 g/mol = 4.572 g Measure 4.572 grams of solid silver fluoride using a balance and add it to the 300 mL volumetric flask. Fill the volumetric flask with distilled water until it reaches the 300 mL mark and mix well to ensure the silver fluoride is completely dissolved. You have now prepared a 0.120 M aqueous solution of silver fluoride using a 300 mL volumetric flask by adding 4.572 grams of solid silver fluoride.

learn more about silver fluoride here.

https://brainly.com/question/30362231

#SPJ11

ANSWER

EXPLANATION

Given that;

Follow the steps below to find the grams of H2SO4

Step 1; Find the number of moles of H2SO4 using the below formula

Recall, that Avogadro's number is 6.02 x 10^23

Step 2; Find the mass of H2SO4 using the formula below

Recall, that the molar mass of 98.079 g/mol

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

Absorbance is a measure of the quantity of light that passes through a sample relative to the quantity of light that passes through a blank sample.

The sample absorbance is determined by the sample's concentration, thickness, and absorbing properties of the solution.

In order to calculate the expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution, we need to use the Beer-Lambert Law.

It states that the absorbance of a solution is directly proportional to the concentration of the solution and the length of the path that the light has to travel through the solution.

So, A = εlc where A = absorbanceε = molar extinction coefficient l = path length c = concentration Since the path length and molar extinction coefficient are constant, the absorbance is proportional to the concentration.

So, A1/A2 = C1/C2

Where, A1 = absorbance of the standard solutionC1 = concentration of the standard solution

A2 = absorbance of the unknown solutionC2 = concentration of the unknown solution Rearranging the formula we get, C2 = C1(A2/A1)

Given that the concentration of the standard solution is 0.0070 mol/L and the path length is 1 cm.

The molar extinction coefficient for NiCl2·6H2O is 4.76 × 10^3 L/mol·cm. Substituting these values in the formula we get, C2 = 0.0070 mol/L × (0.380/1.660) = 0.0016 mol/L

Again, using the Beer-Lambert law we can find the expected absorbance of the unknown solution, where A = εlc.A = 4.76 × 10^3 L/mol·cm × 1 cm × 0.0016 mol/L = 7.62.

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

To know more about Standard solution refer here:

https://brainly.com/question/18720754#

#SPJ11

Answer:

9

Explanation:

7 is neutral anything higher than 7 is a base anything lower than 7 is an acid.

The evidence that indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier: Whole logs mixed in with the rocks, Clay-sized particles and An abundance of snow and ice

The following evidence indicated that the map made near Lake Tapps in Washington was a massive lahar from Mt. Rainier and not an old glacier:

Whole logs mixed in with the rocks: The presence of whole logs mixed in with the rocks suggests a rapid and powerful flow, characteristic of a lahar, rather than the slow movement associated with glaciers.

Clay-sized particles: The presence of clay-sized particles is often associated with lahars, as they can be easily transported by the flowing volcanic material.

An abundance of snow and ice: The presence of snow and ice is indicative of a recent event, as glaciers tend to accumulate and retain snow and ice over time. In the case of a lahar, the presence of snow and ice suggests a more recent deposition.

Learn more about Evidence, here:

https://brainly.com/question/31812026

#SPJ4

Answer:

god says dont use any assault language okay?

Explanation:

Answer:

D

Explanation:

Chemistry is often called the central science because of its role in connecting the physical sciences, which include chemistry, with the life sciences and applied sciences such as medicine and engineering. The nature of this relationship is one of the main topics in the philosophy of chemistry and in scientometrics.

Edible mushrooms: Consuming edible mushrooms is safe and provides health advantages like fiber, vitamins, and minerals.

Non-Edible mushrooms: Mushrooms that cannot be eaten could be harmful or have unappealing flavors and textures that could be harmful if consumed.

Answer:

Explanation:

These terms simply have to be memorized, but understanding their structure can help you gain a better grasp of their functions.  Lipids have fatty acid chains with lots of bonds, so they are high energy.  Nucleic acids have pieces that can be rearranged into many combinations that can be read by certain structures.  Proteins are composed of different building blocks with different properties.  The sum of these properties is the function of the protein.  Lastly, carbohydrates have compact monomers that are extremely easy to break apart into energy.

Answer:

Lipids -  used for long-term energy storage

Proteins - used for tissue repair and growth

Nucleic acids -  used for storing and transmitting genetic  information

Carbohydrates -  used for energy

Explanation:

Both lipids and carbohydrates are used for energy storage. However, lipids are used for long-term storage and store twice as much energy as carbohydrates, while carbohydrates are used for short-term storage.

Proteins play many roles in our bodies. They are used for tissue repair and growth, metabolic reactions, and coordination of bodily functions. They also maintain proper pH and fluid balance.

Nucleic acids are macromolecules found in all cells and viruses used for storing and transmitting genetic information. Two main types of nucleic acids are DNA and RNA.

The answer is option

The reaction:

is a Synthesis reaction, because from 2 different substances it is produced

In a melting point test, the temperature ought to be recorded when the substance being tested moves from a strong to a fluid state.

This move happens at the melting point, which is the temperature at which the strong stage changes to the fluid stage.

It is significant to watch the temperature at this particular point to precisely decide the melting point of the substance.

The temperature is ordinarily recorded when the strong totally liquefy, with no unmistakable strong particles remaining.

This guarantees that the recorded temperature compares to the genuine melting of the substance beneath the given test conditions.

Learn more about melting point here:

https://brainly.com/question/40140

#SPJ4

The voltage across the 200 ohm circuit element, that draws a current of 4 A, is equal to 800 volts.

To find the voltage across a circuit element, take Ohm's Law, according to which the resistance (R) of a resistor is equal to the product of the current (I) that flows through it and the voltage (V) across it.

Use the values:

Current (I) = 4 A

Resistance (R) = 200 Ω

Using the formula of Ohm's Law:

V = I × R

V = 4 A × 200 Ω

V = 800 V

Voltage is  800 V.

Thus, the voltage across the 200 ohm circuit element, that draws a current of 4 A, is 800 volts.

Learn more about voltage, here:

https://brainly.com/question/23172991

#SPJ1

If an object's mass is 70 g, and its volume is 10cm cubed,  its density is 7 centimeter cube.

The density of any solid substance is the unit of the area occupied by it in per centimeter of the cube of the volume in the given sample and calculated by dividing the mass and the volume of the compound unit will be centimeter cube.

The mass of the given object is 70 gram and the volume is given is 10 cm to find the density,

                       Density = mass of object / volume of object

substituting the value in the formula,

                 Density = 70 / 10

                 Density = 7 centimeter cube.

Therefore, the density of the given object will be 7 centimeter cube if  an object's mass is 70 g, and its volume is 10cm cubed.

Learn more about density, here:

https://brainly.com/question/15164682

#SPJ2

75 for all

Explanation:

Answer:

Explanation: Li= Lithium, Na= Sodium, K= Pottasium, Rb= Rubdium Cs= Cesiuna, Fr= Fransium

6. Energy levels increases as if you move down a group during the number of electrons increases again.

7. A charge with higher and effective nuclear charge makes greater attractions to the electrons, pulling the electrons cloud closer to the nucleus makes it in a smaller atomic radius.

8. Ge= Germanium, He= Helium, O=Oxygen, Barium

Answer:

Since you are producing 3.6 mol CO2, you can calculate the starting moles of CH4 with the simple mole-to-mole ratio: 1 mol CH4 / 1 mol CO2 as a conversion factor. Taking 3.6 mol CO2 x 1 mol CH4 / 1 mol CO2 = 3.6 mol CH4 (after canceling out the moles of CO2 on the top and bottom of the calculation)

Explanation:

To determine how many moles of cellulose are needed to make 1.2 moles of methane, we need to first balance the chemical equation for the reaction. The balanced equation is:

C6H12O6 → 3CO2 + 3CH4

From the balanced equation, we can see that for every 3 moles of methane produced, we need 1 mole of cellulose. Therefore, to make 1.2 moles of methane, we need:

1.2 moles CH4 x (1 mole C6H12O6/3 moles CH4) = 0.40 moles C6H12O6

So, we need 0.40 moles of cellulose to make 1.2 moles of methane. Rounded to the nearest hundredth, this is 0.40 moles.

Learn more about cellulose:

https://brainly.com/question/25118189

#SPJ11

What's the concentration of a naoh solutions in mol/l is 2.58M Nacl when the acid interacts with naoh according to the equation and 25.5 ml of naoh is needed to finish the titration?

the state of someone being focused: the act or activity of focusing. more specifically: focusing on a particular object. My concentration is being disturbed by all that noise. a specialty within a major or a major itself in academia. The kid decided to concentrate in law. The concentration of solutes available in a specific amount of solvent is the substance's concentration. Molarity, or the molar mass of solvent in 1 litre of solution, is a common measuring device for concentrations.

Learn more about concentration here:

https://brainly.com/question/10725862

#SPJ4

The regions of the atmosphere where the temperature increases with altitude is stratosphere and where the temperature decreases with altitude is troposphere and mesosphere.

The earth is surrounded by atmosphere and the atmosphere is divided into several parts.

With increase in altitude the temperature varies in the atmosphere.

The reason of the atmosphere where the temperature increases with the altitude are stratosphere and thermosphere.

The region of the atmosphere where the temperature of the atmosphere decreases with the increase in the attitude easy troposphere and Mesosphere.

To know more about atmosphere, visit,

https://brainly.com/question/28124272

#SPJ4

Answer:

D) Blender..................

Answer:

Explanation: its cold, so energy is being released to try to reach equal temp with the outside area of the cold pack

Ionic compound is defined as those which contains ion and are held together by the attractive forces among the oppositely charged ions.

The names of the ionic compounds is given above and is the most appropriate answer.

Read more about Ionic compounds here https://brainly.com/question/2687188

Answer and Explanation:

For computing the initial quantity of helium we have to apply the law of ideal gas which is shown below:

\(pV=nRT\\)

\(n=\dfrac{pV}{RT}\)

Now we have to compute the ratio between the initial and the final numbers of moles which is

\(\dfrac{n_1}{n_2}=\dfrac{\dfrac{p_1V_1}{RT_1}}{\dfrac{p_2V_2}{RT_2}}\)

The statement defines that

\(T_1=T_2,~p_1=p_2.\)

Therefore

\(\dfrac{n_1}{n_2}=\dfrac{V_1}{V_2}\)

\(\dfrac{n_1}{3.8\times10^{-4}}=\dfrac{230}{860}\iff\\\\ n_1=\dfrac{3.8\times10^{-4}\times230}{860}\)

\(\boxed{n_1\approx1.0\times10^{-4}~mol}\)

And, the variables are known is starting volume and ending gas quantity

Answer:

beginning volume and ending quantity of gas

Explanation:

Rock formations change over the years and their position within the formation helps scientists and researchers determine the age of each layer. The oldest layers are at the bottom of the structure and the newest layers are at the top.

The bottom layer of rock forms first so it is the oldest layer. All layers above are younger and the top layer is the youngest of them all. This order is relative because we cannot know exactly when each layer was formed, only that each layer is younger than the layer below it. The superposition principle shows that younger rock layers lie on top of older rock layers.

Each layer is older than the layer above it. Layer D was deposited first so it is the oldest layer because it is at the bottom. Younger rock units in the order of layers C, B, and A. Sedimentary rocks are piled on top of each other. So the youngest layer is on top of the sequence and the oldest layer is on the bottom.

Learn more about The oldest rocks here:-https://brainly.com/question/14269803

#SPJ9

The molecular formula of the compound is C6H6, which is benzene.

To determine the molecular formula, we need to first find the empirical formula and then determine the molecular formula based on the molar mass.

Assuming 100 g of the compound, the percentage composition by mass of carbon and hydrogen can be calculated as follows:

Mass of carbon = 92.3 g

Mass of hydrogen = 100 g - 92.3 g = 7.7 g

Next, we can convert the mass of each element to moles using their respective atomic masses:

Moles of carbon = 92.3 g / 12.01 g/mol = 7.69 mol

Moles of hydrogen = 7.7 g / 1.01 g/mol = 7.62 mol

To obtain the simplest whole number ratio of atoms in the compound, we divide the number of moles of each element by the smallest number of moles:

C: 7.69 mol / 7.62 mol ≈ 1

H: 7.62 mol / 7.62 mol = 1

Therefore, the empirical formula of the compound is CH.

To determine the molecular formula, we need to know the molar mass of the compound. The molar mass of the empirical formula CH is:

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.01 g/mol

Molar mass of CH = (1 × 12.01 g/mol) + (1 × 1.01 g/mol) = 13.02 g/mol

To calculate the molecular formula, we divide the experimental molar mass (78.12 g/mol) by the empirical formula mass (13.02 g/mol):

Molecular formula factor = 78.12 g/mol ÷ 13.02 g/mol ≈ 6

The molecular formula is obtained by multiplying the subscripts in the empirical formula by the molecular formula factor:

Molecular formula = (C1H1) × 6 = C6H6

Click the below link, to learn more about Molecular forces:

https://brainly.com/question/25863653

#SPJ11

Answer:

7.22 x 10²³molecules

Explanation:

Given parameters:

Number of moles of hydrogen  = 1.2moles

Unknown:

Number of molecules of hydrogen  = ?

Solution:

From the concept of moles, a mole of a substance contains the Avogadro's number of particles.

       1 mole of a substance  = 6.02 x 10²³ molecules;

So;  1.2 moles of hydrogen  = 1.2 x  6.02 x 10²³ molecules;

                                               = 7.22 x 10²³molecules

Answer:

The Grignard reagent will be destroyed

Explanation:

The Grignard reaction is based on a carbanion production (RMgX). If water is present in the glassware, a reaction can take place with \(H_2O\) and the desired product will not be produced. Because an "H" would be transferred from water to the Grignard reagent. (See figure 1)

If we have acetone in the glassware we will have a similar problem. The Grignard reagent would be destroyed and the desired product will not be produced. The Grignard reagent will attack the carbon in the carbonyl group and the carbanion would disappear. (See figure 2)