1. Draw the structure of diiodine monoselenide and
a. Write the formula
b. Determine the molecular geometry
C. Calculate the formal charge of EACH element. (SHOW ALL WORK)
Answers
Diiodine monoselenide is an inorganic compound with the chemical formula I2Se. It is a dark red solid that is sparingly soluble in water. The structure of diiodine monoselenide consists of a linear Se-I-I unit, with the selenium atom in the middle and the two iodine atoms on either side. This arrangement gives the compound a linear, V-shaped structure.
Diiodine monoselenide is an important compound in the field of materials science, as it exhibits some interesting properties. For example, it can be used as a precursor for the synthesis of various selenium-containing compounds, including organoselenium compounds, which are used in catalysis and medicine.
Additionally, diiodine monoselenide has been studied as a potential material for use in electronic devices, due to its semiconducting properties. In conclusion, diiodine monoselenide is an important inorganic compound that exhibits some interesting structural and material properties.
Its linear, V-shaped structure is due to the arrangement of the selenium and iodine atoms in a linear Se-I-I unit. This compound is used in the synthesis of various selenium-containing compounds and has potential applications in the field of electronics.
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Related Questions
why is mineral water a compound
Answers
Answer:
Because it is made up of different minerals which are chemically combined.
Explanation:
how to isolate neutral componnet from acid base neutral compound
Answers
Which type of reaction is the reaction below? Mg(NO3)2 + MCl = HNO3 + MgCl2
a.
synthesis
b.
single Displacement
c.
double Displacement
d.
combustion
e.
decomposition
Answers
Answer:
Double displacement reaction
Explanation:
Assuming the 'MCl' is actually 'HCl', then, this is really easy.
Magnesium Nitrate + Hydrochloric acid = Nitric Acid + Magnesium Chloride
In a double displacement reaction, AB + CD = AD + CB
hence, Mg(NO3)2 + HCl = HNO3 + MgCl2 is a double displacement
Use electron dot structures to model the reaction between NH3 and BF3. Use an arrow to show how the electron pair is
donated. Identify the Lewis acid, Lewis base, and the electron pair.
Answers
When NH3 reacts with BF3, the nitrogen lone pair donates a pair of electrons to the boron atom. This forms a new bond between the nitrogen and boron atoms, and the boron atom gains a full octet of electrons:
F H H
/ \ / /
B F + N /
\ / \ /
F H
NH3 acts as the Lewis base because it donates a pair of electrons to BF3, which acts as the Lewis acid. The electron pair being donated is the lone pair on the nitrogen atom in NH3.
The reaction between NH3 and BF3 can be modeled using electron dot structures.
First, let's draw the Lewis structure for each molecule:
NH3:
H H
\ /
N
/ \
H H
BF3:
F
/ \
B F
\ /
F
In NH3, nitrogen has five valence electrons and each hydrogen has one valence electron. The electrons are shared to form three covalent bonds between the nitrogen and hydrogen atoms, and there is one lone pair of electrons on the nitrogen atom.
In BF3, boron has three valence electrons, and each fluorine has seven valence electrons. The electrons are shared to form three covalent bonds between the boron and fluorine atoms.
In this reaction, NH3 acts as the Lewis base because it donates a pair of electrons to BF3, which acts as the Lewis acid. The electron pair being donated is the lone pair on the nitrogen atom in NH3.
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which amount has the greatest mass?responses1 mole of chlorine1 mole of chlorine1 mole of oxygen1 mole of oxygen1 mole of sodium1 mole of sodium1 mole of uranium
Answers
As a result, we can observe that a mole of sulfuric acid has the largest mass.
What number of atoms, roughly speaking, make up a mole of gold?6.022 X 1023 atoms make up a mole of gold. No matter if we are counting molecules or atoms, a mole will always contain the same amount of units. The quantity is known as Avogadro's number after the researcher who calculated that a sample of carbon-12 weighing 12 grams contained 6.022 X 1023 carbon atoms.
The mass of the neutron is substantially more than that of the electron and somewhat greater than that of the proton. Include the mass number and atomic number in the formula for a hydrogen isotope with two neutrons.
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Which description is common to most vascular and nonvascular organisms in the Kingdom Plantae?
produce pollen
use photosynthesis to get nutrients
have stamens and pistils
produce cones
Answers
Vascular and nonvascular organisms in the plant kingdom use photosynthesis to get nutrients.
Photosynthesis and plantsAll plants make use of photosynthesis to get food.
Vascular plants have vascular tissues such as xylem, phloem, etc. while non-vascular plants are devoid of vascular tissues.
Vascular tissues are used to conduct water (xylem) and manufactured foods (phloem) around the body of plants.
Lower plants have other means (such as diffusion and pseudo-vascular tissues) to conduct materials around their own bodies.
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Subject: Earth Science
Explain the differences in structure and use for life between oxygen gas in the atmosphere and ozone.
(I would like a paragraph)
Answers
Answer:
The only difference is that ozone is made up of three oxygen atoms, while the stuff we breathe (molecular oxygen) is made up of only two atoms. Solar rays high in the atmosphere convert O2 to O3. In the upper atmosphere, rays from the Sun break a normal oxygen molecule into two separate oxygen atoms.
How does the chemistry of the ocean change in response to high levels of CO2 in the atmosphere?
Answers
Calcium is element 20 in the Periodic Table, has a mass of 40 amu and forms a 2+ ionic species. The calcium ion therefore has a. 18 protons, 18 neutrons and 22 electrons b. 22 protons, 18 neutrons and 18 electrons c. 20 protons, 20 neutrons and 18 electrons d. 18 protons, 20 neutrons and 20 electrons e. 20 protons, 18 neutrons and 20 electrons 1. In the following expression a∼1/b, what is the relationship between the components a and b ? a. Direct proportion b. None of the above c. Exact equation d. Inverse proportion e. Proportionality constant
Answers
The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.
The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.
The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.
The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.
So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons
In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion
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The activation of fatty acids for degradation takes place in two steps. What is the intermediate formed and why is activation necessary for β oxidation to occur?.
Answers
The activation of fatty acids for degradation takes place in two steps, Acetyl CoA derived from fatty acids inhibits pyruvate dehydrogenase, the enzyme that converts pyruvate into acetyl CoA.
A saturated or unsaturated carboxylic acid with an aliphatic chain is referred to as a fatty acids. The majority of naturally occurring fatty acids have an unbranched chain with 4 to 28 carbon atoms, which is an even number. Fatty acids are crucial nutritional sources of energy for animals in any of these forms, as well as crucial cellular building blocks. environmental degradation is the process by which anything loses its beauty or quality. Degradation of the environment is the outcome of the complex interaction of socioeconomic, institutional, and technical activity. Economic expansion, population increase, urbanization, intensification of agriculture, rising energy usage, and transportation are just a few of the elements that may contribute to environmental changes.
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Which property can be used to tell gold and pyrite apart?
O A. Color
O B. Conductivity
C. Shininess
D. Malleability
Answers
Answer:
D. Malleability
Explanation:
Gold is made up of the element Au and it is a metal.
Pyrite is iron sulfide and it is a non-metal.
They have very similar appearance to such an extent that pyrite is widely called the fool's gold. To distinguish between the two, we simply explore their metallic properties. Gold is malleable. Pyrite is not. It will crumble under pressure.A rocket can be powered by the reaction between dinitrogen tetroxide and hydrazine:
20a
An engineer designed the rocket to hold 1. 35 kg N2O4 and excess N2H4. How much N2 would be produced according to the engineer's design? Enter your answer in scientific notation.
Answers
Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.
To determine the amount of N2 produced in the reaction between dinitrogen tetroxide (N2O4) and excess hydrazine (N2H4), we need to consider the stoichiometry of the reaction.
The balanced equation for the reaction is:
N2H4 + N2O4 → N2 + 2H2O
According to the stoichiometry of the reaction, for every one mole of N2H4, one mole of N2 is produced. The molar mass of N2H4 is approximately 32.05 g/mol.
Given that the rocket is designed to hold 1.35 kg (1350 g) of N2O4, we can calculate the moles of N2H4 required:
Moles of N2H4 = Mass of N2O4 / Molar mass of N2O4
Moles of N2H4 = 1350 g / 92.01 g/mol ≈ 14.67 mol
Since the stoichiometry is 1:1, the amount of N2 produced will be equal to the moles of N2H4:
Moles of N2 produced = Moles of N2H4 ≈ 14.67 mol
Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.
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The temperature of evaporation is much higher for water than for alcohol. Without knowing more about the chemistry of alcohol, which of the following is the most logical chemical explanation for this phenomenon? Group of answer choices Ionic bonds form between alcohol molecules. These are the weakest type of bond and are easier to break than the hydrogen bonds between water molecules. Fewer hydrogen bonds form between alcohol molecules. As a result, less heat is needed for alcohol molecules to break away from solution and enter the air. Alcohol has a higher surface tension than water. This means that alcohol molecules can easily break away from other alcohol molecules and evaporate at a lower temperature. Alcohol molecules are more cohesive than water molecules. This means that as alcohol molecules evaporate, they pull other alcohol molecules into the air along with them.
Answers
Answer:
Fewer hydrogen bonds form between alcohol molecules. As a result, less heat is needed for alcohol molecules to break away from solution and enter the air.
Explanation:
Hydrogen bonding is a kind of intermolecular interaction that occurs when hydrogen is bonded to a highly electronegative atom.
Both water and alcohols exhibit hydrogen bonding. However, alcohols exhibit fewer hydrogen bonds than water.
As a result of this, the temperature of evaporation is much higher for water than for alcohol because hydrogen bonds hold water molecules more closely than alcohol molecules are held.
How do you identify conduction?
Answers
Direct contact between objects causes conduction or heat transfer. The heat is transferred inside the fluid during convection. Heat transfer in radiation happens by electromagnetic waves without the use of particles.
How can conduction be distinguished?First, ascertain whether the two things are in contact. If they are, conduction is how heat is transferred between them. Determine whether there is a fluid medium, such as a liquid or gas, connecting the items if they are not in contact.
How do you recognize conduction, a type of heat transfer?Evidence of heat transport is apparent. Convection is the phenomenon that causes the air to shimmer over radiators. Conduction is the phenomenon that causes you to feel warm when you place your hand on a spoon that has been sitting in a hot bowl of soup (radiation).
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Q3 (10 points) Find w, x, y and z such that the following chemical reaction is balanced. w Ba3 N₂ + xH₂O →yBa(OH)2 + 2NH3
Answers
The balanced chemical reaction will be;Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3. The values of w, x, y, and z are w = 2z and w = y = 3x.
The given chemical reaction is unbalanced. So, we have to balance it. Let the coefficient of Ba3N2 is w, the coefficient of H2O is x, the coefficient of Ba(OH)2 is y, and the coefficient of NH3 is z. So, the balanced chemical reaction is: wBa3N2 + x6H2O → y3Ba(OH)2 + z2NH3
Coefficient of Ba: 3w = 3y => w = y
Coefficient of N: 2z = w => w = 2z
Coefficient of H: 6x = 2z => z = 3x
Coefficient of O: 2y = 6x => y = 3x
So, the final coefficients are: w = y = 3x and w = 2z
The balanced chemical reaction is; Ba3N2 + 6H2O → 3Ba(OH)2 + 2NH3. Hence, the values of w, x, y, and z are w = 2z and w = y = 3x.
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a tank at is filled with of sulfur hexafluoride gas and of dinitrogen difluoride gas. you can assume both gases behave as ideal gases under these conditions. calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. be sure your answers have the correct number of significant digits. sulfur hexafluoride mole fraction: partial pressure: dinitrogen difluoride mole fraction: partial pressure: total pressure in tank:
Answers
The mole fraction of sulfur hexafluoride gas X(SF₆) = 0.361 and the mole fraction of dinitrogen difluoride gas X(N₂O) = 0.639
moles of each gas
n = m / M
where,
n: moles and m: mass, M: molar mass
SF₆: 16.7 g / 146.06 g/mol = 0.114 mol
N₂O: 8.88 g / 44.01 g/mol = 0.202 mol
The total number of moles is 0.114 mol + 0.202 mol = 0.316 mol
To calculate the mole fraction of each gas
X = moles of gas / total number of moles
X(SF₆) = 0.114 mol / 0.316 mol = 0.361
X(N₂O) = 0.202 mol / 0.316 mol = 0.639
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When two objects come in contact with each other, friction occurs and
a
both objects change directions
b
both objects will receive a certain amount of thermal energy and heat up
c
one object will heat up while the other cools down
d
both objects immediately cool down to room temperature
Answers
Answer:
b
both objects will receive a certain amount of thermal energy and heat up
a certain alcohol contains only three elements, carbon, hydrogen, and oxygen. combustion of a 50.00 gram sample of the alcohol produced 95.50 grams of co2 and 58.70 grams of h2o. what is the empirical formula of the alcohol?a certain alcohol contains only three elements, carbon, hydrogen, and oxygen. combustion of a 50.00 gram sample of the alcohol produced 95.50 grams of co2 and 58.70 grams of h2o. what is the empirical formula of the alcohol?c3h6oc2h6oc5h10och4oc4h8o\
Answers
The empirical formula of the alcohol is C2H3O6.
First, we calculate the moles of CO2 produced:
Molar mass of CO2 = 12.01 g/mol (C) + 2 * 16.00 g/mol (O) = 44.01 g/mol
Moles of CO2 = 95.50 g / 44.01 g/mol = 2.17 mol
Next, we calculate the moles of H2O produced:
Molar mass of H2O = 2 * 1.01 g/mol (H) + 16.00 g/mol (O) = 18.02 g/mol
Moles of H2O = 58.70 g / 18.02 g/mol = 3.26 mol
Now, we determine the ratio of carbon to hydrogen to oxygen atoms by dividing the moles of each element by the smallest number of moles (in this case, the moles of carbon):
Carbon: 2.17 mol / 2.17 mol = 1
Hydrogen: 3.26 mol / 2.17 mol ≈ 1.5
Oxygen: The difference between the total number of moles and the sum of carbon and hydrogen moles:
Total moles = 2.17 mol + 3.26 mol = 5.43 mol
Oxygen: 5.43 mol - 1 mol (carbon) - 1.5 mol (hydrogen) = 2.93 mol
To obtain whole-number ratios, we multiply the ratio by 2:
Carbon: 1 * 2 = 2
Hydrogen: 1.5 * 2 = 3
Oxygen: 2.93 * 2 ≈ 6
Therefore, the empirical formula of the alcohol is C2H3O6.
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Carbon buildup can be removed from the metal portion of a pressing comb by immersing the metal portion of the comb in a solution containing _____.
Answers
Carbon buildup can be removed from the metal portion of a pressing comb by immersing it in a solution containing an acid.
When a pressing comb is used for styling hair, it can accumulate carbon buildup over time. This buildup can affect the comb's performance and hinder smooth gliding through the hair.
To remove the carbon buildup, the metal portion of the comb can be immersed in a solution containing an acid. The acid helps to dissolve and break down the carbon deposits, making it easier to clean the comb.
Acids such as vinegar, lemon juice, or citric acid are commonly used for this purpose. These acids have properties that help in dissolving carbon and other residues. The comb should be soaked in the acid solution for a specific period of time, allowing the acid to work on the carbon buildup.
After soaking, the comb can be scrubbed gently with a brush or cloth to remove any remaining residue. Finally, rinsing the comb thoroughly with water and drying it properly completes the process.
Hence, immersing the metal portion of a pressing comb in a solution containing an acid is an effective method to remove carbon buildup and restore the comb's functionality.
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as the temperature of a gas decreases is volume
Answers
Answer:
it's volume also decrease
Na2O H2 --> 2Na H2O A student performed the above reaction in the lab, and obtained an actual yield of 3.9 grams of H2O. He calculated a theoretical value of 4.2 grams of H2O. Calculate the percent yield of the reaction.
Answers
Answer:
Percentage yield = 92.86%
Explanation:
We are given;
Actual yield = 3.9 grams
Theoretical yield = 4.2 grams
Formula for percent yield is;
% yield = (actual yield/theoretical yield) × 100%
Thus;
% yield = (3.9/4.2) × 100%
% yield = 92.86%
Give me atleast 2 Q&A (question and answer) about Guava leaves
Answers
Q&A about Guava Leaves:
Q: What are the medicinal properties of guava leaves?A: Guava leaves are rich in antioxidants, anti-inflammatory agents, and antibacterial properties. They can be used to treat a wide range of ailments including digestive disorders, skin conditions, and respiratory infections.Q: How can guava leaves be used?
A: Guava leaves can be used in a variety of ways. They can be brewed into tea, used as a poultice for skin conditions, or chewed raw to help alleviate digestive problems. They can also be used in topical applications such as creams and lotions to help treat skin conditions.
Guava leaves are the leaves of the guava tree, scientifically known as Psidium guajava. These leaves are commonly used in traditional medicine and as a natural remedy for various ailments. Guava leaves are also used in culinary applications, such as making tea or used as a herb in cooking.
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What conversion factor is used to convert from moles of substance A to moles of substance B?
A.) molar mass; go to #7
B.) Avogadro's number; go to #1
C.) mole ratio; go to #6
D.) the mass of 1 mole; go to #4
Please help!! Been struggling
Answers
Mole ratio is the conversion factor used to convert from moles of substance A to moles of substance B (option C).
What is mole ratio?Mole ratio is a ratio of the number of moles of one substance to the number of moles of another substance in a balanced chemical equation.
It allows us to convert between moles of different substances involved in a chemical reaction. Molar mass (A), Avogadro's number (B), and the mass of 1 mole (D) can be used to convert between moles and other units, such as mass and number of particles.
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As Mia mixed two substances in a test tube, she noticed that the test tube became warm. She also noticed gas coming from the test tube. Based on Mia's observations, what was most likely occurring inside the test tube?
A.The two substances underwent a physical change
B.The two substances were melting
C.A new substance was forming
D.A change in the mass of the two substances
Answers
Answer:
a new substance was forming
Explanation:
Suppose you have three identical drinking cups: one made of plastic, one foam, and one paper. You want to find out which cup will keep your hot cocoa hot for the longest time. a Phrase a formal question for this experiment. B. What is your hypothesis? c. What is the experimental variable? d. What are three important control variables? e. What type of evidence will you collect to test your hypothesis? F Challenge: Conduct your experiment and summarize your findings
Answers
Explanation:
Remember, a hypothesis is an assumption that may only be accepted after been tested.
a. A formal question using chemistry language for this experiment could be;
Among plastic, foam, and paper, which has a better thermal insulating capacity?
b. Hypothesis: Plastic has a better thermal insulating capacity.
c. The Experimental variable is all the different kinds of materials used in cup production.
d. Three important control variables include;
amount of cocoa in the cup,size of the cup,cup's texturee. Note in other to test your hypothesis, we need to measure the initial and final temperatures in all three kinds of cups.
Help on this question please
Answers
Answer:
the Answer is
Explanation:
30 m east..
Answer: 30m/s east.
Explanation:
Velocity must have both a magnitude(speed) and direction.
A frying pan is made of metal to conduct heat from the stove to the food. However, this conduction is not intended to carry heat to the handle of the pan so that you can touch it without burning your hand. What do we call materials that do not allow heat to be conducted through them?
Answers
kinetic energy can be calculated from what two measurements?
Answers
Kinetic energy can be calculated from two measurements: the mass of the object and its velocity. The formula for calculating kinetic energy is KE = 1/2 mv^2, where KE is the kinetic energy, m is the mass of the object, and v is its velocity.
In other words, the kinetic energy of an object is directly proportional to its mass and the square of its velocity. This means that an object with a larger mass or a higher velocity will have a greater amount of kinetic energy.
It is important to note that the units of kinetic energy are joules (J), which are a measure of energy. This formula is commonly used in physics and engineering to calculate the amount of energy that an object possesses due to its motion.
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A compound MBr4 has a relative formula mass of 439
What is the relative atomic mass of M (Br=80)
Answers
Answer:
119
Explanation:
because the molecular mass of MBr can be found by adding the individual atomic masses of the molecule
Molar mass of M + 4(Molar mass of Br)= Molar mass of
MBr
Molar mass of M +4(80)= 439
Molar mass of M +320 = 439
Molar mass of M = 439 -320
Molar mass of M =119
An inflated balloon is left outside overnight. Initially, it has a volume of 38.7 L when the temperature is 255°C and the pressure is 9.4 atm. At what temperature (in °C) will the balloon have a volume of 65.9 L if the pressure falls to 4.2 atm?