Answer:
Explanation:
In S₈ , there are 8 single bonds which breaks up first . Energy absorbed
= 8 x 240 = 1920 kJ
In S₈ four double bonds of S₂ are formed . Let bond energy be x . In this process energy will be released . energy released in four S₂ molecules formed = 4 x
Given
1920 + 4x = 239
4x = 239 - 1920
x = - 420.25 kJ .
So bond energy of S₂ = 420.25 kJ .
When ethane (C2H6) burns, it produces carbon dioxide and water: 2C2H6(g)+7O2(g)→4CO2(g)+6H2O(l) How many moles of water will be produced when 16 moles of ethane are burned?
Answer:
48 moles
Explanation:
Question 1 of 10 What is molarity a measurement of? O A. The volume of liquid containing a dissolved substance B. The grams of a substance dissolved in a liquid O c. The concentration of a substance dissolved in a liquid O D. The number of moles of a dissolved substance
To do this measure called molarity is commonly used. Molarity (M) is defined as the number of moles of solute (n) divided by the volume (V) of the solution in liters. It is important to note that the molarity is defined as moles of solute per liter of solution, not moles of solute per liter of solvent.
so the answer is D.
hope this helps have a great day....!
According to the concept of molar concentration, molarity is defined as the number of moles of a dissolved substance.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
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6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
Which statement accurately describes a type of potential energy found in a container full of a chemical substance in liquid form?
A) The rotation of the particles in one place where potential energy is stored.
B) The vibration of the atoms in molecules is one place where potential energy is stored.
C) The bonds between atoms are one place where potential energy is stored.
D) The speed of the particles is one place where potential energy is stored
Answer:
The bonds between atoms are one place where potential energy is stored.
What happens when an electron jumps from energy level 1 to energy level 2 in an atom?
In the alkene, when treated with HCl, it shows an increase in weight of 52.14%. what is the molecular formula of alkene?
Answer:
CnH2n
Explanation:
Alkenes are either branched or unbranched hydrocarbons with at least one carbon–carbon double bond (CC) and have a general formula of CnH2n.
How many moles of aluminum oxide (Al2O3) will be produced if 1.5 mole of aluminum (AI) reacts with oxygen? Input a numerical answer only. 4Al + 302 ---> 2Al2O3
Explanation:
The number of moles of Al2O3 formed is approximately 4.25 moles. Second find the limiting reactant. Since O2 has less value that is 2.126 than Al that is 2.287, O2 is the limiting reactant in this reaction.
Does anyone know the answer to this question
Answer:
A
Explanation:
If Hydrogen is H₂ There will be two silver
and is Carbon is C There will only be one gray
and if Oxygen is O₃ There will be three red
chemical reaction NaCl (aq) + AgNO 3 (aq) → AgCl (s) + NaNO 3 (aq) is:
Answer:
This reaction is both precipitation reaction as well as double displacement reaction.
In a double displacement reaction the anions are exchanged and in a precipitation reaction, a precipitate is formed in the end. In this case, AgCl is the precipitate.
the rtoxic byproducts of amino acid breakdown must be excreted which of th folowing is not of thr mina functions of nitrogen exxcreteion
Answer:
The toxic by-products of amino acid breakdown must be excreted. Which of the following is NOT one of the main forms of nitrogen excretion
Explanation:
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Which term best describes the materials that make up rocks?
sand left by erosion
compressed magma
a mixture of minerals
layers of lava
Answer:
is c a mixture of minerals
Explanation:
Is the angle greater than, equal to or less than a right angle ?
This angle is greater than the right angle. The correct option is A.
What is a right angle?The right angle is created when two straight lines cross at a 90° angle, or when they are perpendicular at the intersection. The symbol ∟ represents a right angle.
Look at this angle in the picture. This angle is greater than a right angle. The right angle is 90 degrees, and the angle is greater than the right angle. The angle can be 95 degrees.
Therefore, the correct option is A. greater than a right angle. A right angle looks like the corner of a square.
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The question is incomplete. Your most probably complete question is given below:
A. greater than a right angle
B equal to a right angle
C less than a right angle
List the 2 pKa's for H2SO4
One donut contains 350 kcal. Convert this to calories and joules
350 Kcal is equals to 350000 calorie and 1464400 Joule.
How to calculate energy content in food ?The equation for calculating the energy content of a food source via calorimetry is as follows: Energy (joules) = Mass of water (g) × 4.2 (J/gºC) × Temperature increase (ºC)
1 Kcal = 1000 calorie
Therefore,
35 Kcal = 350 x 1000
= 350000 calorie
Now,
1 calorie = 4.184 joule
Therefore,
35000 calorie = 350000 x 4.184
= 1464400 joule
Hence, 350 Kcal is equals to 350000 calorie and 1464400 Joule.
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Identify the activated complex in the following reaction.
a. CuFeSO
b. FeFe
c. FeCuSO4
d. FeSO4
The activated complex in the following reaction is: FeCuSO4. The activated complex is a transition state that is an intermediate structure in a chemical reaction. Option C)
An activated complex is a structure that exists temporarily during a chemical reaction and corresponds to the top of the energy barrier that must be overcome for the reaction to proceed to completion.
The activated complex in the following reaction is: FeCuSO4. The activated complex is a transition state that is an intermediate structure in a chemical reaction. It is the structure with the greatest energy within the reaction process and is used to determine the rate at which the reaction occurs. An activated complex exists when the energy required to break the old bonds and form new ones has been absorbed. It has a specific configuration and energy content that is precisely defined.
A chemical reaction is the process by which atoms or groups of atoms in molecules interact to form new molecules. A chemical reaction is caused by the motion of electrons, which are negatively charged particles that surround atomic nuclei. The reaction proceeds through the formation of an intermediate species known as the transition state or activated complex. Reaction mechanisms are the sequence of steps involved in a chemical reaction. These steps describe the intermediate species formed as the reactants are converted to products. Hence option C) is correct.
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Please help, its due today! I'll also make you brainiest (put them in an order that's simple, look at the picture and you'll see what I mean) Thank you and God bless! <33
On beaches there are often areas of grassy dunes where people are prohibited from walking. How do these protected areas preserve ecosystem services? Use the graphic organizer to categorize the following as either examples of land reclamation of protecting biodiversity.
Answer:
Preventing erosion – Land Reclamation
Protecting nesting areas – Protecting Biodiversity
Preventing littering – Land Reclamation
Preventing habitat disruption – Protecting Biodiversity
Protecting native species – Protecting Biodiversity
Preventing contamination of soil – Land Reclamation
Explanation:
I really hope I'm right! I tried my hardest, please give me brainliest :)
have a good day!
What is a peninsula?
Answer:
A peninsula ( Latin: paeninsula from paene "almost" and insula "island") is a landform surrounded by water on most of its border while being connected to a mainland from which it extends.
Explanation:
CAN I GET BRAINLIEST
Which of the following statements about subatomic particles are correct? (select all that apply)
A. Neutrons and protons are the only charges subatomic particles
B. The charge on a proton is equal in magnitude and opposite in sign to that of an electron
C. The mass of a proton is similar to that of a neutron
D. The mass of a neutron is slightly greater than that of an electron
The following statements about subatomic particles are correct:
B. The charge on a proton is equal in magnitude and opposite in sign to that of an electron
C. The mass of a proton is similar to that of a neutron
D. The mass of a neutron is slightly greater than that of an electron.
Subatomic particles refer to the basic building blocks of matter that make up atoms. The main subatomic particles are:
Protons: Positively charge particles found in the nucleus of an atom. The number of protons in an atom determines the atomic number, and thus the identity, of the element.
Neutrons: Neutral particles found in the nucleus of an atom. The number of neutrons in an atom can vary, resulting in isotopes of the same element.
Electrons: Negatively charged particles that orbit the nucleus of an atom. The number of electrons in an atom determines its chemical properties and reactivity.
These subatomic particles interact with each other through electromagnetic forces to form the atoms and molecules that make up matter. Understanding the behavior and interactions of subatomic particles is key to understanding the properties and behavior of matter on a macroscopic scale.
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Match each object to its definition.
A. meteorite
B. meteoroid
C. meteor
->
1. The remains of a rock from space that strikes Earth’s surface
2. A rock that burns up in Earth’s atmosphere
3. A small piece of rock in space
Answer:
definition 1. goes with B. meteoroid
definition 2. goes with C. meteor
definition 3. goes with A. meteorite
Answer: meteoroid - a small piece of rock in space, meteor - a rock that burns up in Earths atmosphere, meteorite - The remains of a rock from space that strike Earth's surface.
Explanation:
why ironing cloths is a example of evaporation
Answer:
2. Ironing of Clothes. The hot iron evaporates the water vapors present in the fabric of clothes, which help to iron the clothes well.
Explanation:
A person slips over banana pills. Give reason
Answer:
We slip when we step on a banana peel because the inner side of banana peel being smooth and slippery reduces the friction between the sole of our shoe and the surface of road.
Eglin land animals have evolved to produce eggs with the tough shells to ensure that
A.external fertilization can take place
B. The egg and the sperm can fuse
C. Parental care is unnecessary
D. The developing embryo does not dry out
Answer:
c
Explanation:
parrntal care is unnecessary
Answer: well, I think the answer is D
Explanation: I mean it is for protection, but it doesn't do a very good job but to not let the embryo dry out in land it does a good job at that
A sample of nitrogen gas was collected via water displacement. Since the nitrogen was collected via water displacement, the sample is saturated with water vapor. If the total pressure of the mixture at 2121 °C is 1.721.72 atm, what is the partial pressure of nitrogen? The vapor pressure of water at 2121 °C is 18.718.7 mm Hg
Answer:
Explanation:
Total pressure = partial pressure of nitrogen + partial pressure of water vapour
partial pressure of water vapour = 18.7 mm of Hg
760 mm of Hg = 1 atm
18.7 mm of Hg = 18.7 / 760 atm
= .0246 atm
Total pressure = partial pressure of nitrogen + partial pressure of water vapour
Putting in the values in atm
1.72 atm = partial pressure of nitrogen + .0246 atm
partial pressure of nitrogen = 1.72 atm - .0246 atm
= 1.6954 atm
= 1.70 atm
partial pressure of nitrogen = 1.70 atm .
Antimony reacts with sulfur to form Sb2S3.
What is the percentage yield for the reaction in which 1.40 g of Sb2S3 is obtained from 1.73 g of antimony and a slight excess of sulfur?
Answer:
.2sb
Explanation:
according to my mind its the percentage of the question
Why does the solubility of alkaline earth metal hydroxides in water increase down the group?
Answer:
The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.
What volume of 0.210 M KOH, , can be neutralized with 59.0 mL of 1.95 M HNO3?
The volume of 0.210 M KOH that can be neutralized with 59.0 mL of 1.95 M nitric acid is 547.86 mL.
How to calculate volume?The volume of a base in a neutralization reaction can be calculated using the following expression;
CaVa = CbVb
Where;
Ca and Va = concentration and volume of acidCb and Vb = concentration and volume of baseAccording to this question, 0.210 M KOH can be neutralized with 59.0 mL of 1.95 M nitric acid. The volume of the base can be calculated as follows;
1.95 × 59 = 0.210 × Vb
115.05 = 0.210Vb
Vb = 547.86 mL
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Platinum is one of the most dense elements (d = 21.5 g/cm3). What is the volume of a 10.0 g sample of the metal?
Answer:
0.465
Explanation:
To find the volume of a substance, divide the mass by the density.
M/D = V
10.0 / 21.5 = 0.4651163
Then round to 3 significant figures: and the density is 0.465
State Beer-Lambert's law?
Where do the carbons and hydrogens go on this structure below?
The representation of carbons and hydrogens on the structure is shown on the attached image.
What is the given structure?The structure given is 3-Methylhexane. 3-Methylhexane is a branched-chain alkane with the molecular formula \(C_{7} H_{16}\). It is also known as 2,3-dimethylbutane or isoheptane.
The molecule consists of a six-carbon chain with a methyl group (-CH3) attached to the third carbon atom from one end, and another methyl group attached to the second carbon atom from the same end, giving it a branched structure.
3-Methylhexane is a colorless liquid with a boiling point of 90-91°C and a density of 0.68 g/cm3. It is commonly used as a reference compound in gas chromatography and as a blending component in gasoline to improve octane rating.
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what is the first step in the scientific inquiry process
Answer:
make an observation that describes a problem
Explanation:
Answer:
The first step in the Scientific Method is to make objective observations.
Explanation:
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