Answer:
diamond is a heterogeneous mixture
Answer:
Diamond is a element.
hope this helps.
What are the coefficients when the chemical equation below is balanced?
_Fe + _H2SO4 = _Fe2(SO4)3 + _H2
A) 2,3,3,3
B) 3,2,3,1
C) 1,1,1,1
D) 2,3,1,3
correlation between the hammett acidconstants of oxides and their activityin the dealkylation of cumene
The correlation between the Hammett acid constants of oxides and their activity in the dealkylation of cumene is that the higher the acid strength of an oxide, the higher the catalytic activity of that oxide in the dealkylation of cumene
Hammett acid constants are a measure of the acidity of an acid in terms of the electronic effects of substituents. The acidity of an oxide is strongly linked to its catalytic activity in the dealkylation of cumene. The higher the acid strength of an oxide, the higher the catalytic activity of that oxide in the dealkylation of cumene.
The acidic properties of oxides are influenced by their electronic properties, such as electronegativity and electron-donating properties. As a result, the electronic properties of substituents are important in determining the Hammett acid constants of oxides.
The dealkylation of cumene is an important industrial process that is used to generate phenol and acetone. Because of its commercial importance, a great deal of research has been done on the catalytic activity of various oxides for this reaction.
The acidic properties of the oxides have a major impact on their catalytic activity for this reaction.
Thus, the correlation between the Hammett acid constants of oxides and their activity in the dealkylation of cumene is explained above.
To learn more about electronegativity :
https://brainly.com/question/18258838
#SPJ11
Which state of matter is characterized by molecules that are tightly packed together and hold their shape?
gas
solid
liquid
plasma
Answer: The answer is Solid
Explanation: :)
what did robert millikan discover about the electron?
robert millikan discover the accurate determination of the charge carried by an electron.
His first significant achievement was the precise measurement of the charge carried by an electron using the elegant "falling-drop method" in 1910, which also revealed the atomic structure of electricity. He also demonstrated that this quantity was a constant for all electrons. In order to ascertain the electric charge that a single electron carries, Millikan started a series of experiments in 1909.
Millikan calculated an electron's charge using the available data. According to his calculations, the charge was 1.5924×10−19C, where C stands for coulomb and represents one ampere*second. The accepted value for an electron's charge today is 1.602176487×10−19C.
Learn more about electron at:
brainly.com/question/1255220
#SPJ4
Which star reaches a greater apparent brightness?
Answer:
he distance to a star can be found by comparing its luminosity to its apparent brightness.
Explanation: A star that is far away will be very dim compared to its luminosity. So it proves that the ratio of its luminosity to apparent brightness will be greater than for a nearby star.
How can you determine whether a solution is acidic or basic?
Answer:
Look at the pH level.
Explanation:
The best way to determine whether a solution is acidic or basic is to look at its pH level. The pH of a solution is a number between 0 and 14.
If a solution has a pH of less than 7, then it is acidic.
If a solution has a pH of 7, then it is neutral.
If a solution has a pH of greater than 7, then it is basic.
hope this helps!! p.s. i really need brainliest :)
you are asked to mix an additional experimental unknown and want to make sure the mixture is a challenging one. using observations and data from the completed experiment, develop a new three dye component mixture that may be difficult to analyze. explain why you chose this mixture
To make a challenging mixture, I would choose three dyes with similar spectra, meaning that they absorb and emit light in similar regions of the spectrum. This would make it difficult to distinguish between the different dyes based on their spectra alone.
For example, I would choose a mixture of rhodamine B, eosin Y, and fluorescein. All three dyes are commonly used fluorescent dyes with similar spectra, making it difficult to differentiate between them based on fluorescence alone. Additionally, these dyes have similar chemical properties, making it difficult to separate them using chromatography methods.
By selecting dyes with similar spectra and chemical properties, I have created a mixture that will be challenging to analyze and may lead to interesting and complex results. This mixture would be a good candidate for further experimentation, as it would require careful analysis and interpretation of the data to accurately determine the composition of the mixture.
Find out more about challenging mixture
brainly.com/question/27007683
#SPJ4
The skin has many sensory nerves in the
_______
Epidermis
Epidermis - The epidermis is the next layer under the stratum corneum. Its function is to protect the body. It produces cells that will eventually become stratum corneum cells. It contains sensory nerves specifically small diameter sensitive temperature fibers.
Answer:
The skin possesses many sensory receptors in the epidermis, dermis, and hypodermis, which allows for discrimination of touch such as pressure differences
Explanation:
Why is innate immunity referred to as nonspecific?
because it provides a built-in mechanism of defense that does not require "training"
because it is a form of defense found in all animal species
because it is a form of defense that functions in all human body systems
because it provides defense against a wide range of pathogens
Answer:
c
Explanation:
The innate immune system is the body's first line of defense against germs entering the body. It responds in the same way to all germs and foreign substances, which is why it is sometimes referred to as the "nonspecific" immune system
What is the balanced equation of Iodine and Starch?
The balanced equation of Iodine and Starch complex during the test for starch is I₂ + I⁻ → I₃⁻.
Iodine starch complexWhen iodine is added to a starch, a deep blue solution is formed due to the presence of Amylose in starch.
Iodine -potassium reagent is often for the test of starch because iodine is not very soluble in water, thus the dissolution of iodine in water is enabled by the presence of potassium.
Balanced equation of Iodine and StarchI₂ + I⁻ → I₃⁻
Thus, the balanced equation of Iodine and Starch complex during the test for starch is I₂ + I⁻ → I₃⁻.
Learn more about test for starch here: https://brainly.com/question/1698910
#SPJ1
iron has two oxidation states +2 and + 3 there are two possible equations for the redox reaction
iron has two oxidation states +2 and + 3 there are two possible equations for the redox reaction - comparatively speaking, ferrous compounds are easier to hydrolyze than their ferric counterparts.
What is Redox reaction ?Compared to ferric oxide, ferrous oxide is more basic in makeup. Comparatively speaking, ferrous compounds are more ionic than their ferric counterparts. Due to the fact that ferrous compounds are more ionic than their corresponding ferric ones, they are less volatile.
The greater positive charge of ferric compounds, however, makes them easier to hydrolyze than the comparable ferrous ones.
The quantity, kind, and distances of the iron atom's neighbors all contribute to their stability. Because each Fe atom is only weakly linked together by three electrons, which makes them susceptible to being dragged away by strong electronegative neighbors like oxygen, both types of ions are stable.
Please click here to learn more about oxidative states please click here : https://brainly.com/question/27060392
#SPJ9
Volume occupied 3.52x10^32 moluchles
of Mathane (CH4)
1) At STP
Answer:
volume = 13097674418.528dm³
Explanation:
n = (3.52)*10^32/(6.02)*10^23)
n = (584717607.97)
n = volume /molar volume
molar volume at stp = 22.4dm³
volume= 584717607.97 x 22.4
volume = 13097674418.528dm³
Which of the following atoms has the largest radius?
a. lithium
b. lead
C. cesium
d. fluorine
e. carbon
Explanation:
first one, a. lithium. it's the largest
how many moles of ammonia can be produced from the reaction of 56.0 grams of nitrogen with 72.0 grams of hydrogen?
4 moles of ammonia can be produced from the reaction of 56.0 grams of nitrogen.
What is mole?
The International System of Units uses the mole (symbol: mol) as the unit of substance amount. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that substance. It is specified that the mole contains exactly 6.02214076×10²³ elementary entities.
The reaction of hydrogen and nitrogen is
N₂ (s) + 3 H₂ (g) → 2 NH₃
The mass of nitrogen is 28.
The mass of hydrogen is 2
The mass of 3 H₂ is 6 .
The mass of ammonia is 14 + (3×1) = 14 + 3 = 17
The mass of 2 NH₃ is 34.
28 grams of nitrogen produced 2 moles of ammonia.
1 grams of nitrogen produced 2/28 moles of ammonia.
56 grams of nitrogen produced (2 × 56)/28 moles of ammonia.
= 4 moles
To learn more about substance, click on the below link:
https://brainly.com/question/14180294
#SPJ4
Explain the relationship by between society and the Technologies of using earths resources
Answer:
We used coal for electricity, water for steam engines when we used them, natural fossil fuels for gasoline and oil and we use earths oxygen/nitrogen gases to breathe
Explanation:
Hope this helps:)....if not then sorry for wasting your time and may God bless you:)
"Asbestos needs to be removed, whether or not it will be
disturbed.
True or False"
False, Asbestos is a naturally occurring mineral fiber that was commonly used in various industries due to its heat resistance, strength, and insulating properties.
Asbestos does not necessarily need to be removed if it will not be disturbed or pose a risk to human health. Asbestos-containing materials that are in good condition and undisturbed are generally considered safe. However, if asbestos-containing materials are damaged, deteriorating, or will be disturbed during renovation or demolition activities, it is necessary to take appropriate precautions, which may include professional removal or encapsulation, to prevent the release of asbestos fibers into the air. The decision to remove asbestos should be based on an assessment of its condition, potential for disturbance, and adherence to local regulations and guidelines.
To know more about Asbestos, click here, https://brainly.com/question/8853025
#SPJ11
Convert the following word equation into a formula equation
fluorine + aluminum bromide → bromine + aluminum fluoride
Explanation:
Fluorine: F-
Aluminium: Al3+
Bromine: Br-
3F2 + 2AlBr3 => 3Br2 + 2AlF3
The balanced equation for the given chemical reaction can be given as
3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)
What is balanced equation?An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of both the reaction have an equal balance of mass and charge.
The products and reactants of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified.
The balanced equation for the given chemical reaction can be given as
3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)
Therefore, the balanced equation for the given chemical reaction can be given as
3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)
To know more about balanced equation, here:
https://brainly.com/question/29769009
#SPJ2
what is the name for the compound NO2
The compound NO₂ is named nitrogen dioxide.
It is a covalent molecule composed of one nitrogen atom and two oxygen atoms that are double bonded to the nitrogen atom. Nitrogen dioxide is a reddish-brown gas with a sharp, pungent odor. It is an important air pollutant, often produced by combustion processes, and can have harmful effects on human health and the environment.
In addition to its role as a pollutant, nitrogen dioxide is also used in various industrial processes, such as the production of nitric acid and as a rocket propellant. The name "nitrogen dioxide" reflects the composition of the molecule and follows the rules of IUPAC nomenclature for covalent compounds.
To know more about the NO₂, here
brainly.com/question/14426945
#SPJ4
what are the numbers of bonding groups and lone pairs in each case? check all that apply. what are the numbers of bonding groups and lone pairs in each case?check all that apply. five electron groups, with four bonding groups and a lone pair. two electron groups, with both groups being bonding groups. five electron groups, with two bonding groups and three lone pairs. five electron groups, with a bonding group and four lone pairs. two electron groups, with a bonding group and a lone pair.
The number of bonding groups and lone pairs in each case is according to the number of electron groups.
1. In the case of five electron groups, with four bonding groups and a lone pair, there are 4 bonding groups and 1 lone pair.
2. In the case of two-electron groups, with both groups being bonding groups, there are 2 bonding groups and 0 lone pairs.
3. In the case of five electron groups, with two bonding groups and three lone pairs, there are 2 bonding groups and 3 lone pairs.
4. In the case of five electron groups, with a bonding group and four lone pairs, there is 1 bonding group and 4 lone pairs.
5. In the case of two-electron groups, with a bonding group and a lone pair, there is 1 bonding group and 1 lone pair.
Learn more about bonding groups at brainly.com/question/28416313
#SPJ11
A spectrophotometric method for the analysis of iron has a linear calibration curve for standards of 0. 00, 5. 00, 10. 00, 15. 00, and 20. 00 ppm. An iron ore sample with an expected iron content of 40–60% w/w is to be analyzed by this method. An approximately 0. 5 g sample is taken, dissolved in a minimum of concentrated HCl, and diluted to 1 L in a volumetric flask using distilled water. A 5. 00-mL aliquot is removed with a pipet. To what volume (10, 25, 50, 100, 250, 500, or 1000 mL) should it be diluted to minimize the uncertainty in the analysis? Explain
To calculate the concentration of the iron sample by using a spectrophotometric method, it is necessary to dilute the sample. The volume to which the sample should be diluted is a crucial question in achieving the most accurate result.
The process involves diluting the sample, and the concentration must be calculated to determine the precise result of the dilution. This question can be answered by calculating the uncertainty and identifying the value of the uncertainty. The value with the lowest uncertainty will be the best value to choose. The volume with the lowest uncertainty will be the ideal volume to dilute the 5 ml aliquot of the iron sample to achieve a result with the minimum level of uncertainty.
To determine the optimal volume for dilution, the uncertainty should be calculated.
This can be done by using the equation for propagation of uncertainty, which states that the uncertainty of the result is equal to the square root of the sum of the squares of the uncertainties of the individual components. When calculating the uncertainty of the diluted sample, the uncertainty of the initial sample and the uncertainty of the diluent must be considered. The uncertainty of the initial sample can be calculated using the calibration curve. As the expected iron content is 40-60%, the concentration of the sample is expected to be 8-12 ppm. The uncertainty of the calibration curve is given by the standard deviation of the calibration standards.
The diluent has a negligible uncertainty. The uncertainty of the diluted sample will be lower if a larger volume is used for dilution because the relative contribution of the uncertainty of the initial sample will decrease. However, the uncertainty of the measurement will increase if the sample is diluted too much because the concentration of the analyte will be too low to be detected accurately. A 100 mL volume is a good choice because it balances the need for sufficient dilution to reduce the uncertainty of the initial sample with the need for sufficient concentration to allow for accurate detection of the analyte.
The volume of the sample that should be diluted is 5 ml. The minimum level of uncertainty is obtained at a dilution of 100 ml. When the volume of the diluent is greater than 100 ml, the uncertainty of the measurement increases, and when the volume of the diluent is less than 100 ml, the uncertainty of the measurement also increases. Thus, a 100 ml volume of diluent is the ideal volume to minimize the uncertainty in the analysis of iron.
to know more about spectrophotometric visit:
brainly.com/question/31632843
#SPJ11
If a solution contains both a strong electrolyte and a nonelectrolyte were to be tested with the conductivity apparatus, what observations would you make regarding the light bulb?
a. no light at all
b. bright light
c. dim light
d. filament would glow slightly
If a solution contains both a strong electrolyte and a nonelectrolyte and is tested with a conductivity apparatus, the observation would be a bright light in the light bulb. Option(b)
A strong electrolyte dissociates completely into ions in solution, leading to the presence of free-moving charged particles that can conduct electricity. This results in a strong electrical current and a bright light in the conductivity apparatus.
On the other hand, a nonelectrolyte does not dissociate into ions and does not contribute to conductivity. However, in the presence of a strong electrolyte, the conductivity is dominated by the electrolyte, leading to a bright light in the bulb. Therefore, the correct answer is (b) bright light.
To learn more about electrolyte refer here:
https://brainly.com/question/28699046#
#SPJ11
An object is acted upon by a force of 22 newtons to the right and a force of 13 newtons to the left. What is the magnitude and direction of the
net force?
ОА
9 newtons to the right
ОВ.
9 newtons to the left
Ос.
22 newtons to the right
OD.
35 newtons to the right
O E.
35 newtons to the left
How many moles of glucose C6H12O6 can react with 15.7 moles of oxygen? C6H12O6 + 6O2 -----------> 6CO2 + 6H2O
2.62 moles of glucose can react with 15.7 moles of oxygen. The balanced chemical equation for the combustion of glucose is:
C6H12O6 + 6O2 → 6CO2 + 6H2O
From the equation, we can see that for every mole of glucose that reacts, 6 moles of oxygen are required. Therefore, the number of moles of glucose that can react with 15.7 moles of oxygen can be calculated as follows:
Number of moles of glucose = (Number of moles of oxygen) / 6
Number of moles of glucose = 15.7 / 6
Number of moles of glucose = 2.62
Therefore, 2.62 moles of glucose can react with 15.7 moles of oxygen.
To know more about oxygen, visit :
https://brainly.com/question/13370320
#SPJ1
An entire group of elements was unknown when the periodic table was first developed because they were unreactive and no known compounds were composed of them.
What most likely led to the inclusion of these elements in the periodic table?
the formation of a compound in the laboratory
new technology that showed how to identify one of the elements
improvements in instruments to measure small masses
more careful experiments to create synthetic elements
Answer:
The correct option is;
New technology showed how to identify one of the elements
Explanation:
The unexpected discovery of argon, which is one of the inert gases, by Lord Rayleigh in 1892, when he observed while attempting to determine more reliable atomic weights by carrying out gas density measurements through experiments that yielded more exact results, that the density of nitrogen obtained from the atmosphere was different from that from pure ammonia
The suspected gas which was the cause of the observation was isolated by removing all the other known gases in the air and with the aid of its emission spectra, which was a new technique of distinguishing materials, metals and gases, William Ramsay was able to show that it was a new chemical species.
Answer:it’s b
Explanation:
An electron has a ______ electrical charge.
Answer:
Negative
Explanation:
Electron is a subatomic particle with a negative charge of -1e unlike the proton which has a positive charge of +1e
In an atom, an electron has a net negative charge revolving in orbits around the nucleus.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
Learn more about atom,here:
https://brainly.com/question/13654549
#SPJ2
What are the similarities in the chemical formula?
Chemical similarity (or molecular similarity) is the likeness of chemical elements, molecules, or chemical compounds in terms of either structural or functional features, i.e. the impact that the chemical substance has on reaction partners in inorganic or biological environments.
What parallels exist between the empirical and molecular formulas?The empirical formula of a molecular simplification is defined as the lowest ratio of atoms. The empirical formula and the molecular formula are therefore connected. The information about the elements contained in a molecule and their ratios is provided by both the molecular formula and the empirical formula.
While a compound's structural formula provides the same information as its molecular formula, it additionally reveals the atoms' connections inside the molecule.
learn more about Chemical similarity
https://brainly.com/question/11574373
#SPJ1
Write correct formulas predict the products and balance the following.
Tin (IV) Sulfate + Ammonium Phosphate forms ?
A sample of helium has a volume of 3.20x10^2 mL at STP. What will be its new volume (inL) if the temperature is increased to 425.0 K and its pressure is increased to 3.50 atm?
Let's see that the STP represents the conditions for the temperature of 0°C (273 K) and for the pressure of 1 atm.
We have this initial data and a volume of 3.20 x 10 ^(2) mL. To solve this problem, we need to use the ideal gas formula:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2},\)where T is temperature, P is pressure, and V volume. Subindex 1 is the initial data and subindex 2 is the final data.
We want to find the final volume, so clearing for V2 in the formula, we're going to obtain:
\(V_2=\frac{P_1V_1T_2}{T_1P_2}\text{.}\)And the final step is replacing the data that we have, where the final data is 425.0 K and 3.50 atm (remember that the volume must be in liters, 1 liter is 1000 mL, so 3.20 x 10^2 mL is 0.32 L):
\(\begin{gathered} V_2=\frac{1\text{ atm }\cdot\text{ 0}.32\text{ L }\cdot425.0K}{273\text{ K }\cdot\text{ 3.50 atm}}, \\ V_2=0.14\text{ L.} \end{gathered}\)The answer is that the new volume of the sample of helium would be 0.14 L.
Consider the following rate law: Rate = k[A]ⁿ[B]ᵐ. How are the exponents n and m determined?
A. By using information in the balanced chemical equation
B. By educated guess
C. By using the subscripts for the chemical formula
D. By using the coefficients of the chemical formulas
E. By experiment
The exponents 'n' and 'm' in the rate law equation are determined through experimentation (Option E).
The exponents 'n' and 'm' in the rate law equation cannot be determined solely by the information in the balanced chemical equation (Option A), the subscripts for the chemical formula (Option C), or the coefficients of the chemical formulas (Option D). These values are not directly related to the reaction kinetics. Similarly, educated guesses (Option B) are not reliable for determining the exponents accurately. The rate law exponents depend on the specific reaction mechanism and the order of reaction with respect to each reactant, which can only be determined experimentally.
By conducting multiple experiments, the rate of reaction is measured under different initial concentrations of the reactants. The experimental data is then used to determine the values of 'n' and 'm'. This is typically achieved by comparing the rate of the reaction at different concentrations of each reactant, and observing the effect on the reaction rate. The experimental data is analyzed using various methods such as the method of initial rates, integrated rate laws, or graphical analysis to determine the exponents 'n' and 'm'. Therefore, the correct answer is option E, "By experiment."
To learn more about rate law refer:
https://brainly.com/question/16981791
#SPJ11
Which is NOT an SI base unit?
The Physical units that do not come under SI units are velocity, force, momentum, and magnetic field.
What are SI units?
It is a measurement system known as the International System of Units that is widely used around the world.The result of a number and a unit is used to express the value of a fundamental constant.MKS (meter, kelvin, and seconds), FPS (foot, kelvin, and seconds), and CGS are the three fundamental SI units (centimeter, kelvin, and seconds).Seven categories can be used to categorize physical quantities: mass (in kilograms), length (in meters), time (in seconds), temperature (in kelvin), amount of material (in moles), electric current (in amps), and luminous intensity (candela)Non-SI unit:
The MKS, FPS, and CGS systems, along with other crucial components, are not required for the terms to work.The amount and direction of the quantity are also expressed in non-SI units.Hence, quantities like velocity, force, momentum, and magnetic field are not SI units.
To know more about SI units visit the link:
https://brainly.com/question/12750330?referrer=searchResults
#SPJ9