What are the basic laboratory techniques or operations that are used in separating components of mixtures and explain why?

Answer:

P6S9

Explanation:

Firstly, let's write the numbers in Latin

1 = mono

2 = di

3 = tri

4 = tetra

5 = penta

6 = hexa

7 = hepta

8 = octa

9 = nona

Secondly, write the symboles of the given elements:

Phosphorus is P

Sulfide is S

Finally, connect the numbers and symbols.

Rule of pronunciation: Number of first element + symbol of first element + number of second element + symbol of second element

P6S9

Please upvote.

The hydrocarbon's molecular structure is \(C_9H_20\).The hydrocarbon's empirical formula is \(C_9\)/4H5.

To solve this problem, we need to use stoichiometry to relate the amount of \(CO__2\) and \(H_2O\) produced to the amount of \(CxHy\) burned.

(a) To find the molecular formula of the hydrocarbon, we need to first calculate the number of moles of \(CO__2\) and \(H_2O\) produced. From the ideal gas law, we know that 1 mole of gas at STP (standard temperature and pressure) occupies 22.4 L. Therefore, 4.032 L of \(CO__2\) at STP corresponds to:

4.032 L / 22.4 L/mol = 0.180 mol \(CO__2\)

Similarly, the mass of H2O produced corresponds to:
3.602 g / 18.02 g/mol = 0.200 mol \(H_2O\)

Since the hydrocarbon undergoes complete combustion, it reacts with oxygen to form \(CO__2\) and \(H_2O\) according to the balanced chemical equation:

\(CxHy\) + (x + (y/4))O2 → \(CO__2\) + (y/2)\(H_2O\)
where x and y are the coefficients of the balanced equation. We can use the stoichiometric ratios to set up two equations:

0.180 mol \(CO__2\) = x mol \(CxHy\) → x = 0.180 mol / 0.0200 mol = 9
0.200 mol \(H_2O\) = (y/2) mol \(CxHy\) → y = 0.400 mol / 0.0200 mol = 20

Therefore, the molecular formula of the hydrocarbon is \(C_9H_20\).
(b) To find the empirical formula of the hydrocarbon, we need to divide the subscripts by their greatest common factor. In this case, both subscripts are divisible by 4, so we get:

\(C_9H_20\) → C9/4H5
Therefore, the empirical formula of the hydrocarbon is C9/4H5.

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Answer:

WTH? That is WOW....-_-

Answer:

wow

Explanation:

wow

The median reaction at the second end point in the HCl and NaOH titration is: HCl + NaOH → NaCl + H2O

In a titration between hydrochloric acid (HCl) and sodium hydroxide (NaOH), the reaction involved is the neutralization reaction between an acid and a base. The balanced equation for this reaction is:

HCl + NaOH → NaCl + H2O

In this reaction, one mole of HCl reacts with one mole of NaOH to form one mole of NaCl (sodium chloride) and one mole of water.

During the titration process, the reaction occurs gradually as the base is added to the acid solution.

The first end point of the titration is reached when the moles of HCl and NaOH are stoichiometrically equivalent, meaning they react in a 1:1 ratio. At this point, all the HCl has been neutralized by the NaOH, and no excess of either reagent remains.

However, if the titration is continued beyond the first end point, the reaction between HCl and NaOH can still occur, albeit in a different ratio.

The second end point refers to the point where the moles of NaOH added exceed the stoichiometrically required amount to neutralize the HCl completely. As a result, any excess NaOH added after the second end point reacts with the excess HCl in a 1:1 ratio.

Therefore, the median reaction at the second end point in the HCl and NaOH titration is:

HCl + NaOH → NaCl + H2O

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No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.

Pound is a unit for measuring weight. 16 ounces makes one pound.

Ounce is also a unit for measuring weight. 16 ounces is equal to 1 pound

So, for making one small robot we need 4 pounds.

1 pound = 16 ounces

4 pounds = 64 ounces

But, we have 48 ounces

We need more = 64 - 48 = 16 ounces or 1 pound

No, 48 ounces are not enough. For making a small robot we need 64 ounces which is equal to 4 pounds.

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9. The number of mole of the argon contained in the tank is 2.39 moles

10. The volume (in liters) of H₂O produced from the reaction is 73.5 liters

The number of mole of the argon contained in the tank can be obtained as follow:

PV = nRT

Inputting the given parameters, we have:

9.4 × 6.25 = n × 0.0821 × 299

Divide both sides by (0.0821 × 299)

n = (9.4 × 6.25) / (0.0821 × 299)

n = 2.39 moles

Thus, the number of mole of the argon gas in the tank is 2.39 moles

The volume of H₂O produced can be obtained as shown below:

4NH₃(g) + 5O₂(g) -> 6H₂O(g) + 4NO(g)

From the balanced equation above,

4 liters of NH₃ reacted to produced 6 liters of H₂O

Therefore,

49 liters of NH₃ will react to produce = (49 × 6) / 4 = 73.5 liters of H₂O

Thus, the volume of H₂O produced is 73.5 liters

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Answer:

C. 65 percent

Answer:

11318 feet and 10.771 inches

Explanation:

there is 3280.84 in one Km

just do 3280.84x3.45

To construct a 95 percent confidence interval for the mean number of grams of acetanilide that can be recovered from 4.85 grams of aniline, we need to first find the mean, standard deviation, and sample size of the data.

Given the dry yields of 10 specimens, the mean can be calculated as (3.85 + 3.88 + 3.90 + 3.62 + 3.72 + 3.80 + 3.85 + 3.36 + 4.01 + 3.82) / 10 = 3.79 grams. The standard deviation can be calculated using the formula: sqrt(sum of squares of deviations from the mean / (n - 1)), where n is the sample size.

Once we have the mean and standard deviation, we can use the t-distribution to find the 95 percent confidence interval. The t-value can be looked up in a t-table given the degrees of freedom, which is n - 1. The confidence interval is then calculated as mean ± t-value × standard deviation / sqrt(n).

This interval gives us an estimate of the mean yield of acetanilide that we can expect to obtain with a 95 percent confidence. It also gives us an idea of the precision of our estimate, as the width of the interval gives us an idea of the variability in the data.

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The balanced chemical equation for the complete combustion of propan-2-ol (also known as isopropanol) is: C₃H₈O + 5O₂ → 3CO₂ + 4H₂O.

Complete combustion is a chemical reaction between a fuel and an oxidant that produces only carbon dioxide and water vapor as the products. In other words, in complete combustion, all of the fuel is burned completely, producing the maximum amount of heat and light energy. The general equation for complete combustion of a hydrocarbon fuel is: hydrocarbon + oxygen → carbon dioxide + water. In this reaction, methane reacts with oxygen to produce carbon dioxide and water vapor. This reaction is exothermic, meaning it releases heat energy, and it is used in many applications such as heating and energy production. Complete combustion is different from incomplete combustion, where the fuel is not burned completely and other products such as carbon monoxide (CO) and unburned hydrocarbons are produced. Incomplete combustion is generally less efficient and can produce harmful pollutants.

Here,

This equation shows that one molecule of propan-2-ol reacts with five molecules of oxygen gas to produce three molecules of carbon dioxide and four molecules of water vapor. This reaction releases energy in the form of heat and light and is a common way of producing energy from organic fuels. The balanced equation shows that the number of atoms of each element is the same on both sides of the equation, which is a requirement for a balanced chemical equation.

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Answer:

  98.9%

Explanation:

2 moles of I₂ are required for each mole of Mg, so the reaction is limited by the available I₂. The 3.56 moles of I₂ should react with 1.78 moles of Mg to produce 1.78 moles of MgI₂. Instead, we get 1.76 moles of MgI₂.

The yield is 1.76/1.78 × 100% ≈ 98.876%

The yield is 98.9% of the quantity expected based on available reactants.

The sodium is found mainly in the extracellular fluid, most chloride is found in the intracellular fluid.

Intracellular fluid (ICF) is the liquid contained within cells in the body. It represents approximately two-thirds of the body's total fluid volume and is responsible for maintaining the proper functioning of cells. The ICF provides the cells with nutrients and oxygen, helps remove waste products, and helps regulate the cells' internal environment, including temperature and pH. The composition of the ICF is different from the extracellular fluid (ECF) that surrounds the cells and includes a variety of ions, such as potassium, magnesium, and phosphate, as well as proteins and other molecules. The ICF and ECF work together to maintain the body's overall fluid balance and support its various physiological functions.

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Answer:

B

Explanation:

The scientist had a wrong hypothesis?

Answer:

it would be C.

Explanation:

becuase the scientist would know what to to next time for his next experiment. even if it went wrong, he can try to get it right again.

The mass of CO₂ in grams without exponential notation and with the appropriate metric prefix is 31.6 Eg.  

First, let's calculate the amount of mass in grams of 31.6 billion metric tons.

Knowing that 1 metric ton is equal to 1000 kg, 31.6 billion metric tons is:

\(m = \frac{1000 kg}{1 \: metric \: ton}*\frac{1000 g}{1 kg}*31.6 \cdot 10^{12} \: metric \: ton = 3.16 \cdot 10^{19} g\)              

The metric prefix that is close to the above result is exa (E), which is equal to 10¹⁸.

Therefore, the mass of CO₂ in grams without exponential notation and with the appropriate metric prefix is 31.6 Eg (exa-gram).  

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I hope it helps you!

Answer:

no

Explanation:

its ionic

Answer:

No

Explanation:

Argon has a larger atomic radius

The final temperature = 36 °C

The balanced combustion reaction for C₆H₆

2C₆H₆(l)+15O₂(g)⇒ 12CO₂(g)+6H₂O(l)  +6542 kJ

MW C₆H₆ : 78.11 g/mol

mol C₆H₆ :

\(\tt \dfrac{8.5}{78.11}=0.109\)

Heat released for 2 mol C₆H₆ =6542 kJ, so for 1 mol

\(\tt \dfrac{0.109}{2}\times 6542=356.539~kJ/mol\)

Heat transferred to water :

Q=m.c.ΔT

\(\tt 356.539=5.691~kg\times 4.18~kj/kg^oC\times (t_2-21)\\\\t_2-21=15\rightarrow t_2=36^oC\)

The amount of carbon dioxide in the air is increasing in a large city due to the growing number of vehicles. The mayor wants to plant more trees.  I totally agree with the mayor's suggestions.

Growing number of vehicles contributes towards carbon emissions into the atmosphere. Driving a car with gasoline as its fuel produces three carbon emissions. All of the emissions that take place across a company's value chain and are not covered by scope 2.

These emissions aren't caused by the business or the things it makes. Carbon emissions from operating a gasoline-powered vehicle are significant. Scope 3 applies since the product, not the company's machines, is what causes the emissions. There are three types of carbon emissions: 'Scope 1' or 'Direct Emissions' Direct GHG is produced at sources where the fuel is burned there and then. Examples of scope 1 emissions are personal automobiles and gas stoves. Planting more trees will result in minimizing the harmful effect of these gases upon the environment.

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Answer:

Letters

Explanation:

Answer:

Letters

Explanation:

Chemical symbols are used to standardize the 'language of chemistry' and to identify elements and atoms in a chemical formula easily. Chemical symbols consist of one or two letters, most often derived from the name of the element.

The final volume of the ladybug's prison is approximately 0.4 liters.

To determine the final volume of the ladybug's prison, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature. The equation for Boyle's Law is:

P1 * V1 = P2 * V2

Where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume, respectively.

In this scenario, the initial volume (V1) is given as 0.5 L, and the initial pressure (P1) is 1 atm. The final pressure (P2) is 1.25 atm. We need to find the final volume (V2).

Plugging the given values into the equation, we have:

1 atm * 0.5 L = 1.25 atm * V2

Simplifying the equation, we find:

0.5 L = 1.25 atm * V2

Dividing both sides of the equation by 1.25 atm, we get:

0.5 L / 1.25 atm = V2

V2 ≈ 0.4 L

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Answer:

true

Explanation:

Answer:

True

Explanation:

A lack of food can cause people to die to starvation. Natural disasters can wreck people's house, make them lose everything they had, and kill them or force them to move to another place. Diseases often kill hundreds of thousands of people. Predation is the same as everything else.

Answer: 40m/s

Explanation:

71. The broad, painless, pink-gray, wart-like infectious lesions that may develop on the vulva, perineum, or anus in syphilis are called "condyloma lata."

72. In suspected syphilis infection, the term RPR stands for "Rapid Plasma Reagin." It is a blood test used to screen for syphilis.

73. The recommended dosage of Benzathine Penicillin in an adult in Zambia may vary depending on the stage and severity of the syphilis infection. It is best to consult local guidelines or a healthcare professional for the specific recommended dosage in Zambia.

74. The recommended drug for the treatment of gonorrhea when using syndromic management may vary depending on local guidelines and antibiotic resistance patterns. Commonly used antibiotics include ceftriaxone in combination with azithromycin or doxycycline.

75. The causative organism for chancroid is called "Haemophilus ducreyi."

76. The commonest type of HIV is "HIV-1."

77. The assertive, problem-solving approach to the identification and treatment of the patient's problems is called "clinical decision-making."

78. A tumor arising from the cells producing melanin is also known as "melanoma."

79. The type of sound described as drum-like, loud, and empty quality felt over a gas-filled stomach, intestine, or pneumothorax during percussion is called "tympany."

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Transition Metals is more often used to conduct electricity. Transition metals have free electrons in outer energy levels because d-orbitals shields poorly. That's why transition metals are good conductor of heat and electricity.

Transition metals are similar to main group metals in many ways, including their metallic appearance, malleability and ductility, ability to conduct heat and electricity, and ability to form positive ions.

In the periodic table, transition metals are found between s-block and p-block elements. D-block elements is the name given to them. A family of metals that display instability and transitional behavior between s block and p block elements are referred to as "transition metals."

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Answer:

a. The Zn and HCl both retained their identity.

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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Answer:

The answer of 1×10 -8 is 2

The numerical value of Kc for the given reaction, with the equilibrium mixture containing 0.0450 M PCl3, 0.116 M Cl2, and 25.8 M PCl5, is approximately 4942.03.

To calculate the numerical value of Kc for the given reaction, we need to set up an expression for the equilibrium constant using the concentrations of the species involved.

The balanced equation for the reaction is:

PCl3 (g) + Cl2 (g) ⇌ PCl5 (g)

The equilibrium constant expression, Kc, is given by:

Kc = [PCI5] / ([PCl3] * [Cl2])

Given the equilibrium concentrations:

[PCl3] = 0.0450 M

[Cl2] = 0.116 M

[PCI5] = 25.8 M

Substituting these values into the equilibrium constant expression, we have:

Kc = (25.8 M) / ((0.0450 M) * (0.116 M))

Calculating Kc:

Kc = 25.8 M / (0.00522 M^2)

Kc = 4942.03

Therefore, the numerical value of Kc for the given reaction, with the equilibrium mixture containing 0.0450 M PCl3, 0.116 M Cl2, and 25.8 M PCl5, is approximately 4942.03.

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Answer:

Newton's third law of motion states that every action, there is an equal and opposite reaction force and that forces come in pairs

Answer:

\(\blue{\boxed{\red{\sf CCl_4 \: will \: dissolve \: in \: gasoline}}}\)

Explanation:

The simple concept that would be applied is

'Like Dissolves Like.'

According to this, the polar solvent will dissolve the polar solutes and the non-polar solvent will dissolve the non-polar solutes.

classification of given compounds as polar or non-polar,

\(\begin{gathered}\boxed{\begin{array}{c|c} \bf Polar & \bf Non-polar \\ \\ \frac{\qquad \qquad}{} & \frac{\qquad \qquad}{} \\ \sf NaCl & \sf CCl_4 \\ \\ \sf NaOH & \sf - \\ \\ \sf KCl & \sf - \end{array}} \\ \end{gathered}\)

Also, the given data says water is a polar solvent while gasoline is a non-polar solvent. From all the information we have, we can conclude that CCl4 is the only compound that will dissolve in gasoline.

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