which of the following is not a safety concern associated with the lab to determine the molar volume of a gas?

It is equal to epsilon busy when we discuss birds. Very is the way things are done. The moller observed bees constantly. The person sees theconcentration. The concentration of the solution has a direct correlation to observable behavior. We should take a copper sulfate solution, proper salve and eight pen. The blue solution is of copper sulfate hydrate. It's local resolution? As the solution is blue. Its maximum absorption is shown. Go to the red region and read the electrical signals. There is a direct correlation between the concentration and the observing. We have provided the volume of the copper sulfate solution, so we have to find the concentration. The copper sulfate solution has a volume of 50 liter. What mass of copper self should be added to the stock solution of discovered separate solution is zero. Recovery is needed to prepare the stock solution, stock solution itself. We know the mass of copper sulfate is required. After finding the stock solution, we have to do the diluting. We have to applaud the standard curve to explain the beads lock at a different dilution first, as we have provided with the volume concentration, we can find the malls by using it. There is a relation to the direction. charity is equal to mass by solar mass of the substance into 1000 by volume, if you write the equation formula. The values were replaced in this equation. Concentration of capital or polarity is what it is. What mass of copper sulfate is added to the stock solution if it is zero? The mass of copper sulfate has to be found and divided by the volume of Ml to arrive at the molar mass. The stock solution has 250. It is to 50 liter. The mass of copper sulfate is equal to 12 point 475 by solving this. The mass of copper sulfate needed to prepare the stock solution is equal to 12.47 g. The simple volumetric equation can be used with stock solution of copper sulfate. The young man is equal to the other one. 15 zero point one moller dilution is required to prepare the stock solution concentration 0.2 molar. All these other things. They have to make a small amount of this. Money is equal to this by using it. The stock solution's polarity is zero 0.2 Into. What amount of stock solution should be added to make up the 50ml? There is a 0.1 solution. The revolution can be done with 0.1 and the volume required. The man is 50. Even is equal to 0.1. They don't point by this so we will get 25. The stock selection is required. We will see more of that. To prepare for these revolutions, we have to use the same equation and money. 0.25 Molar is a standard concentration. The stock solution concentration is determined by the volume added to it. The man is the solution. So it is equal to 0.05 into 50. Well.5 women will be given for this volume of stock solution queries by women. 0.2 is the stock solution concentration, we will be for this one. Everyone is equal to one point. In the everyone is equal to 0.025 into mhm divided by zero, we will get dilution volume of 6.25. Volume of stock solution needed is explained. The final dilution is five and make. 0.2 stop solution concentration into Even is equal to 0.0125 into So even is equal to 0.0 1-5 in two D. The volume of stock solution needs three 125mm. Hope you found something useful.

The relationship between observable behavior and solution concentration is direct.

Solution is defined as a continuous variation of two or more substances in their relative proportions up to what is known as the limit of solubility. An aqueous solution that has more OH-ions than H+ ions is referred to be a basic solution.

The volume of the copper sulfate solution is 50 liters.

To determine the molar mass, the mass of copper sulfate must be determined and divided by the volume of Ml.

250 are in the stock solution. It contains 50 liters.

By solving this, we obtain that the mass of copper sulfate is equal to 12 point 475.

12.47 g of copper sulfate are required to create the stock solution.

It is five and make for the final dilution. Even is equal to 0.0125 into 0.2 stop solution concentration, so even is equal to 0.0 1-5 in two D.

Three 125mm are required for the volume of stock solution.

Thus, the relationship between observable behavior and solution concentration is direct.

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Answer:

olivine i think

Explanation:

Answer:

Kr

Explanation:

The noble gas that is isoelectronic with Br⁻ is krypton.

This is because krypton is the closest noble gas to Br on the periodic table.

Electronic configuration of Bromine is;

            2, 8, 18, 7

  Br⁻ becomes;  2, 8, 18, 8

  Krypton is;       2, 8, 18, 8

Answer:

\(m=397.6gC_8H_{18}}\)

Explanation:

Hello there!

In this case, according to the given chemical reaction, we can set up the heat of reaction per mole of gasoline as shown below:

\(\Delta H=\frac{-10,990kJ}{2molC_8H_{18}}=-5495\frac{kJ}{molC_8H_{18}}\)

Now, since the total heat is obtained by multiplying the moles and heat of reaction, we can calculate the moles as shown below:

\(n=\frac{Q}{-\Delta H } \\\\n=\frac{19,126kJ}{-(-5495\frac{kJ}{molC_8H_{18}} )} \\\\n=3.48molC_8H_{18}}\)

Finally, since the molar mass of gasoline is 114.22 g/mol, we can easily calculate the mass as follows:

\(m=3.48molC_8H_{18}} *\frac{114.22gC_8H_{18} }{1molmolC_8H_{18}} } \\\\m=397.6gC_8H_{18}}\)

Best regards!

Answer:

First, we need to convert 0.750 g of lidocaine into milligrams (mg):

0.750 g = 750 mg

Next, we can calculate the total volume of the solution needed to administer 750 mg of lidocaine. Since each 150 mL of the solution contains 500 mg of lidocaine, we can set up the following proportion:

(750 mg) / (500 mg) = (x mL) / (150 mL)

Cross-multiplying:

500x = 750 * 150

500x = 112,500

x = 112,500 / 500

x = 225 mL

Now, we know that it will take 225 mL of the solution to administer 750 mg of lidocaine.

To find the time it takes to infuse 225 mL at a rate of 300 mL/hr, we can set up another proportion:

(225 mL) / (300 mL/hr) = (y min) / (60 min)

Cross-multiplying:

300y = 225 * 60

300y = 13,500

y = 13,500 / 300

y = 45 min

Therefore, it will take 45 minutes to administer 0.750 g (or 750 mg) of lidocaine at a rate of infusion of 300 mL/hr.

It will take approximately 75 minutes for 0.750 g of lidocaine to be administered through the IV at a rate of 300 mL/hr.

To calculate the time it takes to administer 0.750 g of lidocaine, we need to use the information provided.

Given:

Each 150 mL of the solution contains 500 mg of lidocaine.

The rate of infusion is set at 300 mL/hr.

First, we need to determine the amount of lidocaine administered per mL of the solution:

500 mg of lidocaine per 150 mL of solution = 500 mg / 150 mL ≈ 3.33 mg/mL

Next, we can convert the amount of lidocaine to be administered (0.750 g) to milligrams:

0.750 g * 1000 mg/g = 750 mg

Now, we can calculate the total volume of the solution needed to administer 750 mg of lidocaine:

750 mg / 3.33 mg/mL ≈ 225.23 mL

Finally, we can find the time it takes to administer 225.23 mL of the solution at a rate of 300 mL/hr.:

Time (in hours) = Volume (mL) / Rate (mL/hr.)

Time (in hours) = 225.23 mL / 300 mL/hr ≈ 0.75077 hr.

Converting hours to minutes:

Time (in minutes) ≈ 0.75077 hr * 60 min/hr ≈ 45.05 min

Therefore, it will take approximately 75 minutes for 0.750 g of lidocaine to be administered.

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The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

Explanation:

Smoking a cigarette, snorting cocaine, or drinking yourself into oblivion are all easy habits to adopt because they light up your brain with the neurotransmitter …

If a student notices that  one-quarter of the moon is visible, a lunar eclipse has taken place.

Eclipse is said to occur when one of the heavenly bodies casts a shadow on another heavenly body causing it to be partly visible or completely invisible. When the earth comes between the sun and the moon, a lunar eclipse is said to occur.

When a lunar eclipse occurs, the moon may be partly visible or completely invisible. Therefore, if a student notices that  one-quarter of the moon is visible, a lunar eclipse has taken place.

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Answer: an orbital notation of the atom

Explanation:

If Chuck wants to know how many electrons in an atom are not paired up, the model that would be best for Chuck to write out is an orbital notation of the atom.

Orbital notation is simply utilized to write the configuration of an electron so that certain information regarding the electrons that are contained in the atom of an element can be known. It should also be noted that the orbital notation can help in knowing an electron's quantum numbers.

Therefore, the answer is "an orbital notation of the atom".

Answer:

an orbital notation of the atom

Explanation:

Manganese, Mn, forms two ions, one with a 2+ charge and one with a 3+ charge.  the formula for manganese (II) sulfide is MnS.

The manganese atomic number is 25. the manganese is the metal . metal have tendency to donate valence electron. manganese donate 2 electrons and form Mn⁺². The sulfur atomic number is 16. sulfur is nonmetal and tendency to accept electrons. sulfur accepts electrons and form S²⁻. The manganese and sulfur thus combines and form ionic compound. the formula for ionic compound manganese(II)sulfide is  MnS

Thus, Manganese, Mn, forms two ions, one with a 2+ charge and one with a 3+ charge.  the formula for manganese (II) sulfide is MnS.

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Answer:

thermal conductors

steel

polystyrene

thermal insulator

between things of the same temp?

sorry to ask but if its ok with you, may i get brainly, i need to rank up all i need is two more, if not its fine. thank you and yours truly golden

Answer:

A copper cup with a mass of 100.0 g contains 96.0 g of water. Both. the cup and the water are at 13.0OC. If 70.0 g of a substance at 84.0OC is added to the cup, the temperature increases to 20.0OC. If the specific heat capacities of copper and water are exactly 390 and 4180 respectively, find the specific heat capacity of the substance.

Explanation:

hope this helps

Buffering capacity measures a solution's capability to withstand pH fluctuations by either absorbing as well as desorbing H+ as well as OH- ions.

Aqueous buffer solutions were made up of a weak acid as well as its conjugate base or even a weak base as well as its conjugate acid. The capability of buffer solutions to keep a fairly constant pH value in reaction to the addition of a tiny amount of acid or base is an important attribute.

A buffer would be a solution that avoids pH changes when a minuscule portion of strong acid as well as strong base is added. Technical definition (How does one come up with one?): A buffer was made up of a weak acid and its conjugate base.

Thus, the correct answer will be option (b).

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The mass (in grams) of chlorine gas is needed to react with 251 grams of iron is 479 grams. Option C.

To determine the mass of chlorine gas needed to react with 251 grams of iron, we need to use the stoichiometry of the balanced chemical equation:

2Fe + 3Cl2 → 2FeCl3

From the balanced equation, we can see that 2 moles of iron (Fe) react with 3 moles of chlorine gas (Cl2) to produce 2 moles of iron(III) chloride (FeCl3).

To calculate the mass of chlorine gas, we can follow these steps:

Step 1: Convert the given mass of iron (Fe) to moles.

Using the molar mass of iron (Fe), which is approximately 55.85 g/mol, we can calculate the number of moles of iron:

moles of Fe = mass of Fe / molar mass of Fe

moles of Fe = 251 g / 55.85 g/mol

moles of Fe ≈ 4.5 mol (rounded to one decimal place)

Step 2: Use the mole ratio from the balanced equation to find the moles of chlorine gas (Cl2) needed.

From the balanced equation, we know that 2 moles of Fe react with 3 moles of Cl2. Therefore, the moles of Cl2 can be calculated as:

moles of Cl2 = (moles of Fe / 2) * 3

moles of Cl2 = (4.5 mol / 2) * 3

moles of Cl2 ≈ 6.75 mol (rounded to two decimal places)

Step 3: Convert the moles of chlorine gas to grams.

Using the molar mass of chlorine gas (Cl2), which is approximately 70.90 g/mol, we can calculate the mass of chlorine gas:

mass of Cl2 = moles of Cl2 * molar mass of Cl2

mass of Cl2 = 6.75 mol * 70.90 g/mol

mass of Cl2 ≈ 479 grams (rounded to the nearest whole number) Option C is correct.

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Answer:

2 and 4 are the best answers

Explanation:

Answer:

A and B

Explanation:

Took the k12 test.

Answer:

If you are looking for the answer, for the question.

Earthquakes trigger tsunamis when the seismic activity causes the land along fault lines to move up or down

Answer:

The function of root hairs is to collect water and mineral nutrients that are present in the soil and take this solution up through the roots to the rest of the plant. As root hair cells do not carry out photosynthesis they do not contain chloropla

Explanation:

Root hairs lack chloroplasts since they don't make food. These are intended to draw water and minerals from the soil.

Single tubular root cells make up root hair cells. Their unique lateral elongation boosts the root system's contact surface with the soil. Water and nutrients are mostly taken up by root hairs from the rhizosphere.

This implies that they lack chloroplasts. Long projections on root hair cells expand the space that the plant can use to collect water and minerals.

They have a wide surface area for water absorption and are long and thin so they can pass through soil particles. Osmosis transports water from the earth to the cytoplasm of the root hair cell.

Thus, the chloroplast is missing in root hair cell.

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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:

Reverse faults are caused by a type of stress known as compression where two sections of rock push into one another along a fault. The compression causes one side of rock to move either above or below the other side

Answer:

Neon

Explanation:

K=C degrees+273.15 = 40.0+273.15=313.2 K

M=1.57g/L×0.08206 atm L/mol K×313.2 K/2.00 atm

M=20.17 g/mol

K= Kelvin

M= Molar Mass

Answer:

6116g

Explanation:

2SO2(g) + O2(g) + 2H2O(ℓ) −→ 2H2SO4(ℓ)

We want to find the mass in grams of SO2 that is needed to react with 1527 g of O2. First we must convert the grams of O2 to moles of O2 then to moles of SO2 and then to grams of SO2

So first lets find the molar mass of O2

The mass of oxygen according to a periodic table is 15.999

Using this the mass of O2 would be 15.999(2) = 31.988g

Next we need to identify the mole ratio of O2 to SO2

Looking at the equation for 1 mole of O2 there are two moles of SO2

Next we need to find the molar mass of SO2

Again the mass of oxygen is 15.999g and the mass of Sulfur is 32.066

So the mass of SO2 would be 15.999(2) + 32.066 = 64.064g

Now that we have found all the needed conversions :

We can now use dimensional analysis to calculate the answer.

Kindly check the attached image to see the table. ( sorry if its a bit blurry )
Explanation : The conversions are used to cancel out the units to get to the final unit which is gSO2.

Once the units are cancelled out except for the gSO2 we mutliply and divide based off of what the table says to do.
Here first we divide 1527 by 31.988. We than multiply by 2. Finally we multiply by 64.064 to get the final answer which is 6116gSO2

Explanation:

A nitrogen-containing compound that shows no absorption band at around 3400 cm^−1 and no absorption bands between approximately 1700 cm^−1 and 1600 cm^−1 is likely an amide compound.

Amides typically exhibit a characteristic absorption band in the region of 3200-3500 cm^−1 due to the N-H stretching vibration. The absence of this absorption band suggests the absence of N-H bonds, which rules out compounds like primary or secondary amines.

The absence of absorption bands between 1700 cm^−1 and 1600 cm^−1 eliminates functional groups such as carbonyl compounds (e.g., aldehydes, ketones, carboxylic acids, esters) and imines, which typically exhibit absorption in this region.

Therefore, based on the given information, it can be inferred that the compound is likely not an amine, carbonyl compound, or imine. Other classes of compounds that do not possess these characteristic absorption bands would need to be considered.

mol = conc × v

= 1.5 × 0.09

= 0.135 moles of HCl

HCl + NaOH > NaCl + H2O

1 mole HCl = 1 mole NaOH

0.135 mol HCl = x

x = 0.135 mol NaOH

mass = mol × molar mass

= 0.135 × 40

= 5.4 g

NaOH = 23 + 16 + 1 = 40 g/mol

I'm not a 100% sure if it's correct

Answer:

6H20 represents six molecules of water

Answer:

6H20 represents six molecules of water

Explanation:

Converting the units of a measurement is an essential skill that everyone should have. In our daily life, there are numerous situations where we might need to convert the units of measurement. One of the common examples can be when baking. To get the desired outcome, it is crucial to have the right amount of ingredients.

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The number of copper atoms are in 5.33mol CuCl2 =5.33 ​ × 6.023 × 1023 = 3.21 × 1024

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An electrochemical series consists of both electropositive and electronegative elements. The elements which acquire electrons are said to be electronegative and they are present below the element hydrogen in the series.

Electrochemical series describes the arrangement of elements in the order of their increasing electrode potential values. The series has been developed by measuring the potential of various electrodes versus standard hydrogen electrodes.

Galvanization and painting are the two methods which are used to prevent corrosion. Galvanized metal is coated with a thin layer of zinc to protect against corrosion. Rusting of iron can be prevented by painting.

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Answer:

it depends on the drink

Explanation:

it can depends on the nutritional facts, ingredients used, the time the drink was made and so on and really change the effects still depending on the drink

Sports drinks are flavored beverages often containing carbohydrates, minerals and electrolytes (salts), and sometimes vitamins or other nutrients. On the other hand, energy drinks typically contain stimulants such as caffeine and guarana with varying amounts of sugar protein, vitamins, sodium and other minerals.

The amount of substance is measured with the SI unit, the mole.

Mole is the ratio of the given mass of substance to the molar mass of that substance.

Or it is the ratio of the number of molecules of substance to the Avogadro number.

Mathematically, it can be written as

Mole = given mass / molar mass

Or Mole = number of molecules / Avogadro number.

For first case,

Temperature is measured with the SI unit, the celsius. So, this is incorrect option.

For second case,

As we know that, mass is measured with the SI unit, the gram. So, this is also incorrect option.

For fourth case,

Length is measured with the SI unit, the metre. So, this is also incorrect option.

Therefore, option C is the correct option.

Thus, we concluded that the amount of substance is measured with the SI unit, the mole.

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