Is chloroform a polar molecule? How do you know?
Answer:
A polar molecule does not have an even distribution of electrons. ... Therefore Chloroform is a polar molecule because it does not have an even distribution of molecules, and one end is more negatively charged (Cl) than another (H).
Explanation:
The structures of TeF4 and TeCl4 in the gas phase have been studied by electron diffraction (S. A. Shlykov, N. I. Giricheva, A. V. Titov, M. Szwak, D. Lentz, G. V. Girichev, Dalton Trans., 2010, 39, 3245).
a. Would you expect the Te i X (axial) distances in these molecules to be longer or shorter than than Te i X (equatorial) distances? Explain briefly.
b. Which compound would you predict to have the smaller X(axial) i Te i X(axial) angles? The smaller X(equatorial) i Te i X(equatorial) angles? Explain briefly.
Answer:
See explanation
Explanation:
Two structures are pictured in the image attached, structure 2 is a more stable structure for TeF₄ or TeCl₄ since the lone pair in the structure is present at an equatorial position. Note that the structure of the compound is based on a trigonal bipyramid but of the structure type AX4E, where the lone pair could be positioned at axial or equatorial positions as shown in the images attached.
As a result of repulsion between electron pairs, the bond distance between Te - X(axial) is greater than Te-X (equatorial). This implies that the Te - X(axial) bonds are longer than Te - X(equatorial) bonds.
In answering the question, we must take cognisance of the fact fluorine is more electronegative than chlorine. This implies that fluorine will draw more electron density towards itself than chlorine and this shortens the bond length.
The structures of the both compounds are based on a trigonal bipyramid with a bond angle of 90° for axial position and 120° for the equatorial position.
Owing to the greater electo negativity of fluorine, both the fluorine F-axial and F-equatorial bonds of TeF4 are shorter than the Cl-axial and Cl-equatorial bonds of TeCl4. Hence the axial and equatorial angles in TeF4 are smaller than the axial and equatorial bond angles in TeCl4 due to the greater electro negativity of the fluorine atom.
A chemistry student is given 250.0 mL of clear aqueous solution at 42 C. He is told an unknown amount of a certain compound X is dissolved in the solution. The student allows the solution to cool to 25C. At that point, the student sees that a precipitate has formed. He pours off the remaining liquid solution, throws away the precipitate and evaporates the remaining liquid solution under vacuum. More precipitate forms. The student washes, dries, and weighs the additional precipitate. It weighs 8.75 g. Using only the information above, can you calculate the solubility of X at 25C? If yes, calculate it.
Answer:
No
Explanation:
The solubility of a solid in water refers to the amount of that solid that dissolves in water.
It is not possible to calculate the solubility of the solid because the student threw away the first precipitate that formed. We already have the volume of water, but having lost some mass of precipitate, it has become impossible to accurately determine the solubility.
Hence the answer provided above.
The Lewis structure of an oxygen atom should have _____________ dots drawn around the symbol .The Lewis structure of a calcium atom should have ____________ dots drawn around the symbol Ca. The Lewis structure of a nitrogen atom should have ___________ dots drawn around the symbol N. The Lewis structure of an aluminum atom should have ___________ dots drawn around the symbol Al. The Lewis structure of a fluorine atom should have _________ dots drawn around the symbol F.
Answer:
Oxygen- 6
Calcium-2
Nitrogen-5
Aluminum-3
Flourine-7
Explanation:
A Lewis structure or dot electron structure is a representation of an atom in which the valence electrons on the outermost shell of the atom are represented as dots.
These dots show the number of valence electrons as well as the group to which the atom belongs in the periodic table.
The Lewis structure of an oxygen atom should have 6 dots drawn around the symbol
The Lewis structure of a calcium atom should have 2 dots drawn around the symbol Ca
The Lewis structure of a nitrogen atom should have 5 dots drawn around the symbol N
The Lewis structure of an aluminum atom should have 3 dots drawn around the symbol Al
The Lewis structure of a fluorine atom should have 7 dots drawn around the symbol F
For Oxygen atomThe oxygen atom has 6 electrons in its outermost shell
Hence, the Lewis structure of an oxygen atom should have 6 dots drawn around the symbol
For Calcium atomThe calcium atom has 2 electrons in its outermost shell
Hence, the Lewis structure of a calcium atom should have 2 dots drawn around the symbol Ca
For Nitrogen atomThe nitrogen atom has 5 electrons in its outermost shell
Hence, the Lewis structure of a nitrogen atom should have 5 dots drawn around the symbol N
For Aluminum atomThe nitrogen atom has 3 electrons in its outermost shell
Hence, the Lewis structure of an aluminum atom should have 3 dots drawn around the symbol Al
For Fluorine atomThe fluorine atom has 7 electrons in its outermost shell
Hence, the Lewis structure of a fluorine atom should have 7 dots drawn around the symbol F
Hence,
The Lewis structure of an oxygen atom should have 6 dots drawn around the symbol
The Lewis structure of a calcium atom should have 2 dots drawn around the symbol Ca
The Lewis structure of a nitrogen atom should have 5 dots drawn around the symbol N
The Lewis structure of an aluminum atom should have 3 dots drawn around the symbol Al
The Lewis structure of a fluorine atom should have 7 dots drawn around the symbol F
Learn more here: https://brainly.com/question/19244176
What is the mass of an object that has a density of 0.500 g/cm3 and a volume of 5.00 mL?
Answer:
The answer is 2.5 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 0.5 g/cm³
1 mL = 1 cm³
5 mL = 5 cm³
volume = 5 cm³
The mass is
mass = 0.5 × 5
We have the final answer as
2.5 gHope this helps you
Is oxidation an example of an extensive property or an intensive property? Explain.
to an atom.
Neutrons add only
a. mass
b.ions
C. positive charge
d. negative charge
Please select the best answer from the choices provided
A
В
С
D
Pls help fast due in 10 mins!!! :(((((((( ughhh please!
Answer:
The answer is A, Neutron adds only mass
What is the enthalpy change for the reaction
What type of compound is Calcium phosphide?
Answer:
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Calcium phosphide (CP) is the inorganic compound with the formula Ca3P2. It is one of several phosphides of calcium, being described as the salt-like material composed of Ca2+ and P3−.
Explanation:
Answer:
Inorganic Compound
All of the following are evidence of a chemical change except
Change of matter
Formation of gas
Color change
Precipitate forms
Answer:
The right answer is A, "Change of matter."
Explanation:
The formation of gas, color change, and precipitate forming are the 3 main chemical changes that are evidence of a new substance being produced. A change of matter is not. Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter's chemical makeup or chemical properties.
1.Which phase of matter will maintain a constant volume, but not a constant shape?
solid
liquid
Gas
plasma
Which of the following reasons explains why some cooking pors are made of metal, but their handles are made of wood? (4 points)
a
Both wood and metal have low thermal conductivity
Both wood and metal have high thermal conductivity
Wood has low thermal conductivity, and metal has high thermal conductivity
Wood has high thermal conductivity, and metal has low thermal conductivity
с
d
Is the following equation balanced? P + 3O₂ ----> 2P₂O₃
Answer:
4P+ 3(O2)= 2(P2O3)
Explanation:
Need to add 4 infront of P on left hand side to balance number of atoms on both sides
FAST PLEASE HELP All atoms of the same element must have the same number of
O protons.
O neutrons.
O compounds.
O electrons.
Answer: A. Protons
Explanation:
Use the trends in ionization energy and electron affinity to explain why sodium bromide has the formula NaBr and not Na2Br or NaBr2. Which one of the following is the correct statement?
a) All metals form 1+ ions and sodium is a metal.
b) Sodium only has one electron, so it has only one to lose.
c) Sodium has only one valence electron which can be lost relatively easily; removing a second electron would be more difficult because it would have to be a core electron.
What is the mass of a liquid with a density of 2.12 g/mL and a volume of
53.0 mL ?
Answer:
The answer is 112.36 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of liquid = 53 mL
density = 2.12 g/mL
We have
mass = 2.12 × 53
We have the final answer as
112.36 gHope this helps you
Reactivity of the alkali metals is best described by: *
4 points
increases within the group as you descend down the periodic table
decreases within the group as you descend down the periodic table
depends upon the number of valence electrons that are being removed
increased, then decreases for elements with more valence electrons
none of the above
Answer:
Increases within the group as you descend down the periodic table
Explanation:
Hello,
In this case, since the reactivity of alkali metals increases within the group as you descend down the periodic table due to the fact that it is easier for electrons to be given or taken away due to the atomic size, which increases as much as the period increases.
That is why potassium reacts more heavily with water than sodium.
Best regards.
2. Which of these activities would most likely be carried out by a civil engineer who
specializes in environmental engineering?
A. testing steel beams for a large bridge
B. brainstorming ways to prevent landslides on steep slopes
C. designing a new system for unloading cargo from rail cars
D. developing a robot to search for survivors of natural disasters
Applying physical and scientific concepts to the design, development, and maintenance of both the artificially produced environment as well as the naturally occurring built environment is known as civil engineering. The correct option is B.
What does a civil engineer do?In both the public and private sectors, civil engineers conceptualize, design, develop, supervise, run, and maintain infrastructure projects and systems, such as highways, buildings, airports, tunnels, dams, bridges, and water supply and sewage treatment systems.
Traditionally, civil engineering has been divided into a variety of sub-disciplines. It is defined to separate non-military engineering from military engineering and is regarded as the second-oldest engineering subject after military engineering.
A civil engineer make brainstorming ways to prevent landslides on steep slopes. In some locations, a civil engineer is qualified to do land surveying; in other locations, surveying is only permitted for building purposes without a different licence.
Thus the correct option is B.
To know more about civil engineer, visit;
https://brainly.com/question/30257813
#SPJ2
Which of these molecules is an important source of ENERGY for most organisms?
Question 2 options:
glycogen
table salt NaCl
hydrochloric acid
glucose
Answer:
Glucose
Explanation:
Glucose molecule is the primary source of energy for most organisms where processes such as glycolysis starts and cellular respiration follows. Bodies of organisms can get energy from carbohydrates, proteins and fats with carbohydrates being the main component for energy where they are converted to glucose which is a form of sugar that reacts to affect blood sugar levels within an hour or two hours after eating.
The second answer option, table salt (NaCl) is incorrect because sodium added in food is vital for functioning of nerves and muscles. Additionally, it helps in fluid regulation and control of blood pressure/volume in the body.
The third answer , hydrochloric acid is not correct because presence of hydrochloric acid in the body helps in breaking down, digestion and absorption of nutrients.
The correct answer choices are : A and D.
One _____ is the amount of energy needed to apply a force of 1 Newton over a distance of 1 meter. (Spell out your answer.)
The answer is joule
5A. Particles in a solid are closer/farther apart than they are in a liquid
or gas which are closer/farther apart.
5B. Conduction involves the collision of particles in less/more dense
materials collide less/more often than particles in less/more dense
materials. For example, solids conduct thermal energy faster/slower
than liquids or gases because the particles are closer or farther apart
and collide frequentiylrarely.
Answer:
Wait so what is the answer, before any one says any thing I knw this is Not a question so plz don't say nothing about it.
Explanation:
Particles in a solid are closer than they are in a liquid or gas which are farther apart. Conduction involves the collision of particles in more dense materials.For example, solids conduct thermal energy faster than liquids or gases because the particles are closer and collide frequently.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
Learn more about conduction,here:
https://brainly.com/question/12136944
#SPJ2
Gaseous hydrogen and oxygen can be prepared in the laboratory from the decomposition of gaseous water.
The equation for the reaction is
2H2O(g)⟶2H2(g)+O2(g)
Calculate how many grams of O2(g) can be produced from 58.9 g H2O(g).
Answer:
Mass of oxygen = 52.32 g
Explanation:
Given data:
Mass of water = 58.9 g
Mass of oxygen produced = ?
Solution:
Chemical equation:
2H₂O → 2H₂ + O₂
Number of moles of water:
Number of moles = mass/ molar mass
Number of moles = 58.9 g/ 18 g/mol
Number of moles = 3.27 mol
Now we will compare the moles of water with oxygen from balance chemical equation.
H₂O : O₂
2 : 1
3.27 : 1/2×3.27 = 1.635 mol
Mass of oxygen produced:
Mass = number of moles × molar mass
Mass = 1.635 mol × 32 g/mol
Mass = 52.32 g
40.3 degrees Fahrenheit. Each hour the temperature decreases by 2.09 What is the
temperature after 2 hours?
A 2.50M solution of NaOH is diluted from a volume of 0.890L to a volume of 2.00L, What is the new molarity?
O 2.78011
O 1.11M
O 5.62M
O 4.5M
Answer:
1.11 M
Explanation:
M₁V₁ = M₂V₂
Step 1: Define
Molarity₁ = 2.50 M
Volume₁ = 0.890 L
Molarity₂ = unknown
Volume₂ = 2.00 L
Step 2: Substitute and Evaluate for M₂
(2.50 M)(0.890 L) = (M₂)(2.00 L)
2.225 = M₂(2.00 L)
M₂ = 1.1125 M
Step 3: Simplify
We are given 3 sig figs.
1.1125 M ≈ 1.11 M
What are the 4 parts of cell theory???? List like
1.
2.
3.
4.
Answer:
1. Cells contain DNA that is passed cell to cell during cell divison.
2. Cells are similiar in chemical composition and reactions that maintin homeostasis.
3. All basic chemical and physiological functions are carried out inside the cell.
4. Cell activity depends on the oragnelles withen the cell.
Hope this helps!
what is circulatory role and funcation
Answer:
Transport of gases and nutrients
Explanation:
The circulatory system includes all the vessels that transport blood around the body as well as the blood itself. Sometimes the heart and lungs are also included as part of the circulatory system.
The vessels of the circulatory system are involved in the transport of blood throughout the body. Blood carries the necessary gases to the cells (oxygen) and waste products (CO2) away. It also carries important nutrients to the cells and transports chemical messengers in the form of hormones to their sites of action.
Plants need sunlight to make food during the process of:
Photosynthesis
Respiration
Nuclear fusion
Digestion
the answer is photosynthesis
What is chromatography paper?
Answer:
paper chromatography is an analytical method used to separate colored chemicals or substances.It is primarily used as a teaching tool,having been replaced by other Chromatography methods ,such as thin layer chromatography.
One type of atomic particle that is found in the nucleus does not contribute to
an element's atomic number. What are two characteristics of this type of
atomic particle?
A. Negative charge
B. Almost o amu
C. 1 amu
D. No charge
Answer:
In the middle of every atom is the nucleus. The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. D. No Charge
Explanation:
Answer:
C & D
Explanation:
Just took quiz and got it right! Hope this helps! <3
What is an example of a poly-gastric organism?
Answer:
cow, sheep, goats, deer, elk
