Isopropanol has a molality in water of 9.1315 M. suppose a solution is created using 275.0 ml of water and 191.7 ml of isopropanol, both of which have a density of 1.000 g/ml.
Molarity = grams of solute/molar mass of solute x 1/mass of solvent(Kg)
mass os isopropanol = density x volume
= 0.7860 g/ml x 191.7 ml
= 150.6762 gm
mass of water(solvent) = 275.0 ml x 1.000 g/ml
=275.0 gm
= 0.275 Kg
Molarity = 150.67gm / 60g/mol x 1/0.275Kg
Molarity = 9.1315 M
The number of moles of solute per litre of solution is known as molecularity or molar concentration.
The mass or moles of solute and the volume of the solution can be converted using molar concentration.
Homogeneous mixes are created when ingredients are combined in a way that ensures the composition is consistent throughout the sample. The term "heterogeneous" refers to a mixture that does not have a constant composition across the sample.
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what is the effect of weathering by carbonic acid on these minerals? question 14 options: quartz ferromagnesian (mafic) minerals feldspars calcite
Carbonic acid can weather and dissolve calcite, a mineral composed of calcium carbonate. Quartz, a mineral composed of silicon dioxide, is relatively resistant to chemical weathering by carbonic acid.
As per the question given,
Ferromagnesian (mafic) minerals, such as olivine, pyroxene, and amphibole, may weather and form secondary minerals in the presence of carbonic acid. Feldspars, which are common minerals in igneous rocks and sediments, can undergo chemical weathering by carbonic acid and transform into clay minerals, which are stable at Earth's surface conditions.
What exactly is carbonic acid?
Carbonic acid, with the chemical formula H2CO3, is a carbon-containing substance. This chemical is found in minute concentrations in carbon dioxide solutions in water. Because this combination has one carbon-oxygen double bond, its chemical formula can also be written as OC(OH)2.
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indentify the type of scientific knowledge represented by each statement lol theory hypothesis
1. The Earth revolves around the Sun. Theory: This is a scientific theory, which is an explanation supported by a large body of evidence that explains how a natural phenomenon or phenomenon works.
What is theory?A theory is an explanation or principle that is based on observations, experiments, and logical reasoning. It is an organized system of ideas, concepts, and principles intended to explain how something works or why something happens. Theories are used to explain and predict phenomena and can be used to develop hypotheses, which can then be tested to gain a better understanding of the natural or social world. Theories can be used to understand and explain a wide variety of phenomena in the natural and social sciences, including the behavior of particles, the functioning of the human body, and the social dynamics of large groups of people.
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Tin is an example of an element that has a great number of naturally occurring isotopes. How many neutrons are in tin-120?
Tin being an example of an element that has a great number of naturally occurring isotopes, it has 70 neutrons in total.
Tin-120 is an isotope of tin with an atomic number of 50, which means it has 50 protons in its nucleus. To find the number of neutrons in tin-120, we need to look at its atomic mass, which is typically given in atomic mass units (amu).
The atomic mass of tin-120 is approximately 120 amu. Since the atomic mass of an atom is the sum of its protons and neutrons, we can calculate the number of neutrons in tin-120 by subtracting the atomic number (50) from the atomic mass (120):
number of neutrons = atomic mass - atomic number
= 120 - 50
= 70
Therefore, tin-120 has 70 neutrons.
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weak acid (carbonic acid) results when group of answer choices ozone is dissolved in water carbon dioxide is dissolved in water nitrogen is dissolved in water water contains no impurities
Weak acid (carbonic acid) results when Nitrogen dioxide is dissolved in water contains no impurities.
Carbonic acid is a carbon- containing emulsion which has the chemical formula H2CO3. results of carbon dioxide in water contain small quantities of this emulsion. Its chemical formula can also be written as OC( OH) 2 since there exists one carbon- oxygen double bond in this emulsion.
Carbonic acid is frequently described as a respiratory acid since it's the only acid that's exhaled in the gassy state by the mortal lungs.
Nitrogen dioxide is a chemical emulsion with the formula NO2. It's one of several nitrogen oxides. NO2 is an intermediate in the artificial conflation of nitric acid, millions of tons of which are produced each time for use primarily in the product of diseases. At advanced temperatures it's a sanguine- brown gas.
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How much gas (in moles) is in a 20 L container with a pressure of 2 atm at a temperature of 400k?
Answer: What grade is this for because anything 10 and above my brother can solve
Explanation:
Balance the Equation to Solve. How many grams of Hydrogen (H2) are needed to completely react with 3 moles of Nitrogen (N2)
The molar mass of hydrogen (H2) is 2.016 g/mol. Therefore, the mass of 9 moles of hydrogen is: 9 mol x 2.016 g/mol = 18.144 g. So, 18.144 grams of hydrogen must react with 3 moles of nitrogen completely.
How is ammonia useful?Ammonia is useful in many ways, including fertilizer production, household cleaning product, refrigeration, water treatment, textile production and fuel production.
Why is ammonia a key component of fertilizer?Ammonia is a key component of fertilizer because it contains nitrogen, an essential nutrient for plant growth. Plants require nitrogen to build proteins and other essential molecules. While nitrogen is abundant in the atmosphere, plants cannot use it in its gaseous form. Instead, nitrogen must be converted into a usable form, such as ammonia, through a process called nitrogen fixation.
The balanced chemical equation for the reaction between nitrogen and hydrogen to form ammonia is N2 + 3H2 → 2NH3.
To react completely with 3 moles of nitrogen,
3 moles N2 x 3 moles H2 / 1 mole N2 = 9 moles H2
The molar mass of hydrogen (H2) is 2.016 g/mol. Therefore, the mass of 9 moles of hydrogen is: 9 mol x 2.016 g/mol = 18.144 g
So, 18.144 grams of hydrogen must react with 3 moles of nitrogen completely.
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what percentage of worldwide deaths due to indoor air pollution occurs in developing nations? 50 percent 60 percent 70 percent 90 percent which outdoor air pollutant is also a significant indoor air pollutant? sulfur dioxide nitrogen oxides carbon monoxide lead
The indoor air is found to be more harmful than the outdoor air. The death rate percentage due to the indoor air pollution is 50%. Both sulfur dioxide and nitrogen oxides are outdoor-indoor air pollutant.
What is indoor air pollution?The pollution which is caused from the dust, dirt or gases inside the home or workplace which is harmful to breathe in is defined as the indoor air pollution. The poor quality of air can cause diseases like stroke, cancer, asthma, etc.
About 50 % of the population is died due to indoor air pollution. The pollutants like NOₓ, SO₂, O₃ are indoor and outdoor air pollutants.
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Write a balanced equation for the reaction between nitric acid HNK3 and ZnOH2
Answer:
Explanation:
The balanced equation for the reaction between nitric acid (HNO3) and Zinc Hydroxide (Zn(OH)2) is:
2 HNO3 + Zn(OH)2 -------------> Zn(NO3)2 + 2 H2O
This reaction produces Zinc Nitrate (Zn(NO3)2) and water (H2O) as products. The coefficients in front of each element ensure that there are the same number of atoms of each element on both sides of the equation.
why is it often necessary to break up the magnesium turnings in order to start the grignard reaction? hint: what is the chemical composition of the surface of magnesium after long exposure to air and moisture?
It is necessary to break up the magnesium turnings in order to start the Grignard reaction because the air causes the magnesium to oxidize which will be deactivate the Grignard reagent.
It is necessary to break up the magnesium turnings in order to start the Grignard reaction because the air will causes the magnesium to oxidize that will deactivate the Grignard reagent. The Breaking up the magnesium turnings to the exposes pure magnesium to the surface in order to the reaction to occur. The Grignard reagent is the organo magnesium compound that can be described by the chemical formula R-Mg-X.
Thus its is necessary to break the magnesium turnings to proceed the grignard reaction.
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what is the concentration (m) of kcl in a solution made by mixing 40.0 ml of 0.100 m kcl with 50.0 ml of 0.100 m kcl?
The concentration of KCl in the solution made by mixing 40.0 mL of 0.100 M KCl with 50.0 mL of 0.100 M KCl is [tex]0.0444 M.[/tex].
The solution can be calculated by using the formula for dilution of a solution.
Dilution formula: C1V1 = C2V2
Where:
C1 = Initial concentration
C2 = Final concentration
V1 = Initial volume
V2 = Final volume
For this problem:
[tex]C1 = 0.100 M \\V1 = 40.0 mL \\V2 = 90.0 mL (40.0 mL + 50.0 mL)[/tex]
Now we can solve for C2:
C2 = [tex]\frac{(C1V1) }{ V2}[/tex]
C2 = [tex]\frac{(0.100 M * 40.0 mL) }{90.0 mL}[/tex]
C2 = [tex]0.0444 M[/tex]
Therefore, the concentration of KCl in the solution made by mixing 40.0 mL of 0.100 M KCl with 50.0 mL of 0.100 M KCl is [tex]0.0444 M.[/tex]
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1. how does the increasing of the molarity of solution affect the absorbance readings? briefly explain your observation
As the molarity of a solution increases, the absorbance readings of the solution typically increase.
This is because an increase in molarity generally corresponds to an increase in the concentration of the absorbing species in the solution, which in turn leads to an increase in the number of absorbing particles that can interact with the incident light.
The relationship between absorbance and concentration of a solution is described by the Beer-Lambert law, which states that the absorbance of a solution is proportional to the concentration of the absorbing species and the path length of the light through the solution. Thus, an increase in the concentration of the absorbing species (i.e. the molarity of the solution) leads to an increase in the number of particles that can interact with the light, resulting in a higher absorbance reading.
It's worth noting that this relationship between molarity and absorbance is not always linear, and may depend on the specific properties of the absorbing species and the solvent in which it is dissolved. Additionally, if the concentration of the absorbing species becomes too high, the solution may become opaque and the absorbance readings may no longer be meaningful.
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which of the following statements regarding this reaction is true? 1. the hydrocarbon is used in excess. 2. stoichiometry does not matter in this experiment since we are only interested in the rate of the reaction. 3. equimolar quantities of bromine and the hydrocarbon are used. 4. bromine is used in excess.
Statement 3, which claims that equimolar amounts of bromine and the hydrocarbon are employed, is the only one that can be evaluated to be true or untrue based on the information provided.
A type of organic substances known as hydrocarbons is made up of carbon and hydrogen atoms. They are the most basic kind of organic chemicals and are present in both natural and artificial sources, such as plant oils, natural gas, and fossil fuels. Alkanes, alkenes, alkynes, and aromatic hydrocarbons are some of the several structural subgroups that can be categorised according to their physical and chemical characteristics. Many crucial chemicals and goods, including plastics, detergents, and medications, are produced using hydrocarbons as fuels, solvents, lubricants, and raw ingredients. Their use, however, can also result in environmental issues including air pollution and climate change.
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Which statement among the given statements about a chemical reaction involving bromine and a hydrocarbon can be evaluated as true or false based on the information provided, and why are the other statements not able to be evaluated in the same way?
a compound, naclox, where x is unknown, was found experimentally to contain 29.0 % of chlorine by mass. what is the value of x?
x is 1. Sodium chloride (NaCl) is a binary ionic compound composed of sodium (Na) cations and chloride (Cl) anions.
The empirical formula for sodium chloride is NaCl, which means that each formula unit of sodium chloride contains one sodium cation (Na+) and one chloride anion (Cl-).
Since the compound was found to contain 29.0% of chlorine by mass, the molar mass of the compound can be determined as follows:
Mass of Cl = 29.0 g Cl / 100 g compound
Mass of Na = 71.0 g compound - 29.0 g Cl
Moles of Cl = Mass of Cl / Atomic mass of Cl
Moles of Na = Mass of Na / Atomic mass of Na
Since the ratio of sodium cations to chloride anions is 1:1, the number of moles of sodium cations is equal to the number of moles of chloride anions. The empirical formula for the compound is therefore NaCl, and the value of x is 1.
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How many MOLES of AICI3 are in 215 GRAMS of AICI3?
215 grams of AlCl₃ is equal to 1,61 moles of AlCl₃. The relative molecular mass of the compound AlCl₃ is 133.5 grams/mol.
The mole is one of the basic units used to indicate the amount of substance in the international system of units. The equation for calculating moles is mol = mass / relative atomic mass. To find out the mol of AlCl₃ you can use the following steps
Step 1: Calculate the relative molecular mass for the compound AlCl₃.
Mr AlCl₃ = ( Ar Al × ∑Al ) + ( Ar Cl × ∑Cl)
= ( 27 gam/mol × 1) + ( 35,5 gram/mol × 3)
= 27 gram/mol + 106,5 gram/mol
= 133,5 grams/mol
Step 2: Calculate the moles of the compound AlCl₃.
n AlCl₃ = mass AlCl₃ ÷ relative molecular mass AlCl₃
= 215 grams ÷ 133,5 grams/mol
= 1,61 mol
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which nucleic acid sequence could form a perfectly base-paired, double-stranded molecule with itself? group of answer choices
A nucleic acid sequence that is palindromic, meaning it reads the same forward and backward, could form a perfectly base-paired, double-stranded molecule with itself.
Palindromic Sequences and Perfectly Base-Paired, Double-Stranded Nucleic Acid MoleculesPalindromic sequences are nucleic acid sequences that read the same forward and backward, and they can form perfectly base-paired, double-stranded molecules with themselves. In DNA, palindromic sequences are typically four or more nucleotides in length, and they can be recognized by their symmetry around a central axis. For example, the sequence 5'-CGCG-3' is a palindromic sequence that can base-pair with its complementary sequence 3'-GCGC-5' to form a double-stranded structure. Similarly, RNA sequences can also be palindromic and form double-stranded structures. RNA palindromic sequences tend to be longer and more complex than DNA palindromes, but they also base-pair with their complementary sequences to form double-stranded structures. Palindromic sequences can be found in various regions of the genome, including regulatory regions and coding sequences. They play important roles in DNA replication, gene expression, and recombination. Overall, palindromic sequences are an important feature of nucleic acid structure and function, and they provide insight into the complex molecular mechanisms that underlie many biological processes.
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lithium hydroxide reacts with gaseous carbon dioxide to form solid lithium carbonate and liquid water. how many grams of carbon dioxide would react with 1.00 g of lithium hydroxide?
If lithium hydroxide reacts with gaseous carbon dioxide to form solid lithium carbonate and liquid water. then 0.915 g of carbon dioxide would react with 1.00 g of lithium hydroxide.
The balanced chemical formula for the reaction of carbon dioxide and lithium hydroxide is:
Li2CO3 + H2O = 2 LiOH + CO2.
According to the equation, which is balanced, two moles of LiOH and one mole of CO2 combine to form one mole of Li2CO3.
We must convert the mass of LiOH to moles in order to determine how much CO2 is needed to react with 1.00 g of LiOH. LiOH has a molar mass of:
Lithium's atomic mass is 6.94 and its atomic masses are 15.9994, 1.0079, and 23.95 g/mol respectively.
Hence, 1.00 g of LiOH equals:
1.00 g / 23.95 g/mol equals 0.0417 moles of LiOH
The balanced equation states that 2 moles of LiOH and 1 mole of CO2. The amount of moles of CO2 needed to react with 0.0417 mol of LiOH is therefore:
0.0208 mol CO2 = 0.0417 mol LiOH x (1 mol CO2 / 2 mol LiOH)
Lastly, we can use the molar mass of CO2 to convert the quantity of moles of CO2 to grammes, which is:
1 atomic mass of C plus 2 atomic masses of O equals 44.01 g/mol.
44.01 g/mol times 0.0208 mol CO2 equals 0.915 g CO2
Hence, 0.915 g of carbon dioxide and 1.00 g of lithium hydroxide would react.
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what effect will increasing the volume of the system have on the mole fraction of cl2 in the equilibrium mixture?
Increasing the volume of the system will have no effect on the mole fraction of Cl2 in the equilibrium mixture.
This is because the mole fraction is the ratio of moles of a specific component to the total moles of all components in the system. Increasing the volume will not change the number of moles of any specific component in the system, hence the mole fraction of Cl2 will remain constant.
The only factor that would affect the mole fraction of Cl2 is a change in the number of moles of Cl2 or any other component in the system. This can be achieved by adding or removing a specific component or by changing the temperature or pressure of the system. However, changing the volume alone will not affect the mole fraction of Cl2 or any other component in the system.
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Why do ionic compounds need to reach stability in their charges?
Answer:
Ionic compounds need to reach stability in their charges because they are composed of ions, which are atoms or molecules that have gained or lost electrons. The positive and negative charges within an ionic compound must balance out in order to achieve stability. If the charges are not balanced, the compound will be unstable and will tend to react with other ions or molecules in an attempt to reach a state of stability. This is why ionic compounds form crystal lattices, with each ion arranged in a specific position in the lattice so that the positive and negative charges are evenly balanced.
Explanation:
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The K a for hypochlorous acid, HOCl, is 3.0 × 10-8 at 25°C. Calculate the pK b for hypochlorous anions.The K a for hypochlorous acid, HOCl, is 3.0 × 10-8 at 25°C. Calculate the pK b for hypochlorous anions.14.006.487.523.3 × 10-7
The pKb for the hypochlorite ion is 6.48. Rounded to three significant figures, the answer is 6.49.
The pKb for the hypochlorite ion (OCl-) can be calculated using the relationship between the Ka and the Kb of the acid and its conjugate base.
Kw = Ka * Kb
where Kw is the ion product constant of water (1.0 x [tex]10^{-14}[/tex] at 25°C).
At 25°C, the pKa for HOCl can be calculated as:
pKa = -log(Ka) = -log(3.0 x [tex]10^{-8}[/tex]) = 7.52
The pKb for OCl- can be calculated using the following formula:
pKb = pKw - pKa = 14.00 - 7.52 = 6.48
Therefore, the pKb for hypochlorite ion is 6.48. Rounded to three significant figures, the answer is 6.49.
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if a compound is being made with 1 tablespoon of hydrocodone solution and 2 tablespoons of cherry flavoring, how would the ratio be written?
The ratio of hydrocodone answer for cherry seasoning in the compound can be composed as:
1:2.
The proportion of hydrocodone answer for cherry enhancing in the compound is 1:2. This implies that how much hydrocodone arrangement is utilized is half of how much cherry enhancing is utilized. Proportions are an approach to looking at least two amounts, and they are commonly communicated as a small portion or with a colon. For this situation, the proportion is communicated utilizing a colon to isolate the two amounts. Proportions can be utilized in various settings, from cooking to science to back. In this particular case, the proportion is utilized to guarantee that the perfect proportion of every fixing is being utilized to make the ideal compound.
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Which of the following questions would most likely be investigated by a chemist?
Answer:
Chemists typically investigate questions related to the composition, structure, and properties of matter, as well as its interactions with energy and other substances. Some examples of questions that a chemist might investigate include:
What is the chemical composition of a given substance?
How does the structure of a molecule affect its properties?
How do different chemical reactions occur, and what are the conditions necessary for them to occur?
How do substances interact with one another in solution?
What is the rate at which a chemical reaction occurs, and how can it be influenced by various factors such as temperature, pressure, and concentration?
Explanation:
These are just a few examples of the types of questions that a chemist might investigate. In general, a chemist's research is focused on understanding the underlying principles and processes of matter and energy at the molecular and atomic level.
calcium chloride is used as a deicer for melting ice and snow on roadways and sidewalks. its chemical formula is cacl2. what is the formula mass of calcium chloride? your answer should have five significant figures.
From the given information, the formula mass of calcium chloride is 110.98 g/mol, rounded to five significant figures.
To calculate the formula mass of calcium chloride, we need to determine the atomic mass of each element in the compound and then sum them up based on the chemical formula:
Atomic mass of Ca = 40.078 g/mol
Atomic mass of Cl = 35.45 g/mol
The formula mass of calcium chloride (CaCl₂) can be calculated as follows:
Formula mass = (atomic mass of Ca) + 2 x (atomic mass of Cl)
Formula mass = 40.078 g/mol + 2 x 35.45 g/mol
Formula mass = 110.98 g/mol
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An aqueous solution has 0.0070 gram of oxygen dissolved in 1000. grams of water. What is the dissolved oxygen concentration of this solution in parts per million?
A 7.0 ppm
B 1.4 x 10^5 ppm
C 7.0 x 10^-6 ppm
D 1.4 x 10^11 ppm
Answer:
the answer is A: 7.0 ppm
Explanation:
To calculate the dissolved oxygen concentration in parts per million (ppm), we need to divide the mass of the dissolved oxygen (0.0070 g) by the mass of the water solution (1000 g) and then multiply by 10^6 to convert the result to ppm.
0.0070 g / 1000 g * 10^6 = 7.0 ppm
The dissolved oxygen concentration in parts per million (ppm) for 0.0070 gram of oxygen in 1000 g of water is 7 ppm. Hence, option A is correct.
What is dissolved oxygen ?Dissolved oxygen (DO) refers to the amount of molecular oxygen (O2) dissolved in water or another liquid. It is an important measure of water quality, as many aquatic organisms depend on dissolved oxygen to survive.
Dissolved oxygen concentration (ppm) = (mass of dissolved oxygen / mass of solution) x 10^6
The mass of the solution is the mass of the water plus the mass of the dissolved oxygen:
mass of solution = 1000. grams of water + 0.0070 gram of oxygen
mass of solution = 1000.0070 grams
Substituting the values in the formula, we get:
Dissolved oxygen concentration (ppm) = (0.0070 / 1000.0070) x 10^6
Dissolved oxygen concentration (ppm) ≈ 6.9997 ppm
Therefore, the dissolved oxygen concentration of this solution in parts per million is approximately 7.0 ppm (option A).
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) 4 (N₂C1) + H₂0 C •List the amount of Molecules Of each element
One mole of every elements contains 6.02 × 10²³ atoms. Then, 4 moles of N₂ contains 2.4 × 10²⁴ molecules . one mole of water contains 6.02 × 10³¹ molecules.
What is Avogadro number ?One mole of a substance is its amount containing 6.02 × 10²³ atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.
Similarly one mole of every compound contains 6.02 × 10²³ molecules. The mass of one mole of compound is called its molar mass.
Given that there are 4 moles of the compound. One mole of every N₂ 6.02 × 10²³ molecules. Then, 4 moles of N₂ contains 2.4 × 10²⁴ molecules
One mole of water contains Avogadro number of water molecules. One formula unit of water contains 2 hydrogens and one oxygen. Then, there are 2.4 × 10²⁴ hydrogen atoms and 6.02 × 10²³ oxygens.
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Your complete question is as follows:
Given the reaction below: List the amount of Molecules Of each element in the reactant side.
4 N₂ (g)+ H₂O (l)
What are the 4 steps for a problem solving using unit conversions
Here are the four steps for problem-solving using unit conversions:
1.Identify the initial unit and the desired unit
2.Find the conversion factor
3.Set up the conversion
4.Check your work
Here are the four steps for problem-solving using unit conversions:
1.Identify the initial unit and the desired unit: Start by identifying the initial unit of measurement and the unit of measurement you want to convert to. This will help you to understand what type of conversion you need to make.
2.Find the conversion factor: Next, you need to find the conversion factor that relates the two units of measurement. This factor can be found in a conversion table or calculated using a mathematical formula.
3.Set up the conversion: Once you have the conversion factor, you can set up the conversion by multiplying the initial value by the conversion factor. This will give you the value in the desired unit of measurement.
4.Check your work: Finally, it's important to check your work to make sure that you have the correct units and that your answer makes sense. You should double-check your calculations and make sure that your answer is reasonable given the context of the problem.
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which of the following should be most soluble in water? group of answer choices o2(g) vitamin a (a mostly nonpolar molecule) i2(s) vitamin c (a very good hydrogen bonder) c6h6(l)
The following are soluble in water;
vitamin c
How do you determine solubility in water?The solubility of a substance in water refers to the amount of the substance that can dissolve in a given amount of water at a specific temperature and pressure.
The solubility of a substance can be determined by conducting an experiment in which a known amount of the substance is added to a known amount of water, and the mixture is stirred until no more of the substance can dissolve. The concentration of the dissolved substance can then be determined by measuring its mass, volume or concentration using a suitable method.
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if 3.907g of carbon combines completely with 0.874g of hydrogen to form a compound, what is the percent composition of this compound?
The composition of the compound is 12%hydrogen and 56% carbon.
Is hydrogen a liquid or a gas?The lightest element is hydrogen. At room temperature and pressure, hydrogen is a gas, but at -423 degrees Fahrenheit, or -253 degrees Celsius, it condenses to a liquid.
What are the benefits of hydrogen?Many additional applications exist for hydrogen. The Haber process is used in the chemical industry to produce cyclohexane and alcohol, that are intermediates in the creation of polymers and medicines, as well as ammonia for agricultural fertilizer. In the course of the oil-refining process, it is also employed to remove sulfur in fuels.
Divide the amount of the each component by the overall number of constituent components in the compound to get the percentage composition, and multiply this result by 100.
mass of C present in compound= 3.907g
mass of H present in compound= 0.847g
The total mass of the compound = 7g
% of C = 3.907 / 7 × 100 = 55.81 ≅ 56%
% of H = 0.847 / 7 × 100 = 12.1 ≅ 12%.
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What is the empirical formula of with 4 significant digits Carbon:80.19 Hydrogen:9.62 Oxygen:10.19 keeping 4 significant digits
in the experiment, you are instructed to use 10 ml of a 5% solution of adipoyl chloride and 10 ml of a 5% solution of hexamethylenediamine. assuming these solutions are %volume/volume, calculate the mmol of each reagent that will be used in the experiment. which reagent is the limiting reagent?
The moles of adipoyl chloride 3.4 mmol and the moles of hexamethylenediamine is 3.8 mmol. The reagent is the limiting reagent is the adipoyl chloride .
The 5% v/v adipoyl chloride means that 5 mL of the adipoyl chloride in the 100 mL of solution
10mL of adipoyl chloride solution = (5mL× 10mL)/100mL
= 0.5mL
The density = 1.26 g/mL
The mass of the adipoyl chloride = density × volume
= 1.26 × 0.5
= 0.63 g
The moles of adipoyl chloride = mass / molar mass
= 0.63 / 183
= 0.0034 mol = 3.4 mmol
The mass of the hexamethylenediamine = density × volume
= 0.89 × 0.5
= 0.445 g
The moles of the hexamethylenediamine = 0.445 / 116
= 0.0038 mol = 3.8 mmol
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What is the product of benzoic acid with sodium hydroxide?
Sodium benzoate is the product from the reaction of benzoic acid with sodium hydroxide.
A chemical reaction is defined as a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
When NaOH is added to benzoic acid it neutralizes the benzoic acid producing the benzoate ion, which now goes into the aqueous layer, leaving other other two organic compounds in the ether. Similarly, it can be observed that nitroaniline that is not soluble in neutral or basic conditions, but is soluble in acidic type solutions.
The balanced chemical reaction is given as,
C₆H₅COOH(s) + NaOH(aq) → C₆H₅COO⁻Na⁺(aq) + H₂O(l)
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#SPJ4
