Chemistry High School
I believe the correct answer from the choices listed above is option C. The statement that describes the VSEPR theory would that electron pairs in the valence shell of an atom exert a repulsive force on all other electron pairs in the valence shell of the atom.
Answer: Option C is the answer on plato
i took mastery test, trust
22.4 liters is the same as:
It's the same as23.66982 U.S. quartz, because 1 liter =1.05669 U.S quartz, so multiply that by 22.4 and it equals 23.66982 :3
Gelatin has a density of 1.27 g/cm³. If you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? A. 2540 g
B. 2500 g
C. 3.9 x 10-4
D. 3.937x 10-4
Answer : Option A) 2540 gExplanation :
Here, the density of the gelatin is known to be as 1.27 .
And the volume 2.0 liter
Here, 2 liters = 2 so to convert it into we have to multiply it, with 1000 to 2000 ,
Using, the formula for density;
ρ = density;
m =mass and v=volume.
Substituting the values given; ρ = 1.27
m = to be found and v = 2000
1.27 = m X 2000
m = 2540 g
Therefore, the mass will be 2540 g
The answer to this is a. 2,540 g
How do we know that caramelizing sugar is a chemical change? A.) It involves dissolving sugar in water.
B.) It changes the state of sugar from a solid to a liquid.
C.) It separates sugar from a sugar solution.
D,) It changes the sugar's color.
The answer is D,it changes the sugar's color.
Use the chart to determine which type of bond is formed between potassium (K) and chlorine (Cl). nonpolar covalent
moderately polar covalent
highly polar covalent
Answer : The correct option is, ionic
As we know that the potassium element belongs to group 1 and period 4 which is a metal and the chlorine element belongs to group 17 and period 3 which is a non-metal.
The ionic compound is formed by the electrostatic force of attraction between the metal and a non-metal element.
The covalent compound is formed when two or more non-metal elements share their valence electrons.
Hence, the bond formed between the potassium and chlorine is, ionic bond.
It is ionic. when we have a strong Metal (Na) and strong non metal (Cl) the reaction forms ionic bonds.
Which statement about the effusion rates of nitrogen and oxygen is true? Oxygen effuses 1.07 times faster than nitrogen.
Nitrogen effuses 1.07 times faster than oxygen.
Oxygen effuses 0.9 times faster than nitrogen.
Nitrogen effuses 0.9 times faster than oxygen.
Answer: Nitrogen effuses 1.07 times faster than oxygen.
To calculate the rate of effusion of gas, we use Graham's Law.
This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows:
On solving we get:
Hence, Nitrogen effuses 1.07 times faster than oxygen.
The correct answer is b: nitrogen effuses 1.07 times faster than oxygen.
When 10 grams of copper and 10 grams of iodine are mixed, what is the theoretical yield of copper I iodide?
2Cu + I2 → 2CuI
Mass of Cu = 10 g
Molar mass of Cu = 63.546 g/mol
Moles of Cu = = 0.1574
Mass of I₂ = 10 g
Molar mass of I₂ = 253.8 g/mol
Moles of I₂ = = 0.04
I₂ here is the limiting reactant as it has the least number of moles.
Based on the balanced equation,
1 mole of I₂ = 2 moles of CuI
0.04 mole of I₂ = 0.08 moles of CuI
Molar mass of CuI = 190.45 g/mol
Mass of CuI = 0.08 moles x 190.45 g/mol = 15.236 g
The answer is B) 15 grams
What formula represents a nonpolar molecule containing polar covalent bonds
CCI4 represents a the molecule
When an aqueous solution at room temperature is analyzed, the [H+] is found to be 2.0 × 10−3 M. What is the [OH−]? A. 5.0 × 10−12 M
B. 2.0 × 10−11 M
C. 4.0 × 10−6 M
D. 5.0 × 10−11 M
Answer : The correct option is, (A)
First we have to calculate the pH.
Now we have to calculate the pOH.
Now we have to calculate the concentration.
Therefore, the concentration is,
The answer would be A. 5.0x10-12m
Consider the equation below. Mg(s) + 2HCl(aq) mc008-1.jpg MgCl2(aq) + H2(g)
Which compound is the gas in this chemical reaction?
Answer: Option (d) is the correct answer.
The given chemical reaction is as follows.
When we use the subscript (s), the it means that the substance is solid. When we use the subscript (aq), then it means that the substance is aqueous. When we use the subscript (g), then it means that the subscript is gas.
Thus, in the given chemical reaction is the gas.
I believe the correct answer from the choices listed above is the last option. It would be H2 or hydrogen the gas in the given chemical reaction. It is very clear in the subscript (g). Hope this answers the question. Have a nice day.
A violation of which type of behavior is unacceptable but not illegal?
Answer: C. A norm
There is no list, do you have one?
Gaps in rock layers that develop when agents of erosion remove existing rock layers
- Gaps in rock layers that develop when agents of erosion remove existing rock layers are known as unconformities.
- Each unconformity represents a missing layer of rock or a gap in the rock layers. It is a contact between sedimentary rocks which are different in age or between sedimentary rocks and older, eroded igneous or metamorphic rocks.
- Unconformities represents gaps in geologic record, periods of time which are not represented by any rocks. Unconformities may take three different forms, namely, the disconformities, angular unconformities and the nonconformities.
The answer to your question is unconformities.
Salt dissolves more quickly in water when the water molecules are moving very quickly. In which of these water samples would salt dissolve most slowly?
I believe the answer is A. 15 degrees Celsius.
So, If salt dissolves faster when molecules moves very fast, We add kinetic energy. When we add Kinetic energy to water, we make the water get hotter, which causes the molecules in the water to move faster.
So, if the water is hotter the salt will dissolve faster!
15 degrees Celsius translates to 59 degrees Fahrenheit. Anything number bigger than 15 degrees will dissolve quicker than 15. 98 degrees Celsius is much hotter than 15 degrees Celsius, so I don't understand how anyone would get that answer.
your answer is number a or letter a
How many atoms of hydrogen are there in one molecule of C3H5(OH)3?
8 I believe h5 means you have 5 hydrogen plus the 3 from the OH3 gives you eight or so I believe
What is an isotope? Give an example
Isotopesare atoms with the same number of protons but that have a different number of neutrons. Since the atomic number is equal to the number of protons and the atomic mass is the sum of protons and neutrons, we can also say that isotopes are elements with the same atomic number but different mass numbers.
example:Carbon 12 and Carbon 14 are bothisotopesof carbon
are atoms with the same number of protons but that have a different number of neutrons.
Which statement explains the process of a chemical reaction? a. Reactants react to produce new substances known as products.
b. Products combine to produce new reactants.
c. Substances are mixed together, producing a homogeneous mixture.
d. Substances are mixed together, producing a heterogeneous mixture.?
The statement that explain the process of a chemical reaction is
reactants react to produce new substances known as product (answer A)
- A chemical reaction is a process in which substance (reactant) are converted into new products.
- Example of a chemical reaction is between nitrogen which react with hydrogen to form ammonia.
that is N2 +3H2 → 2NH3
- N2 and H2 are the reactant while NH3 are the product.
A, because a chemical reaction is the combining of different reactants,
A deficiency in zinc might result in stunted growth.A deficiency in zinc might result in stunted growth. TRUE
The answer is to this question is
I think a dificiency in zinc
What periodic trends exist for electronegativity?
The highest electronegativity is in the elements in the top left corner of the periodic table, and the lowest in the bottom right corner. Therefore, traveling up or to the left across the periodic table will increase the electronegativity
You need to go through a closed door to escape a fire. which action should you take? a. do not feel the door as it may be warm.
b. feel the door first using the back of your hand.
c. feel the door first using your elbow
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If youneed to go through a closed door to escape a fire the action that you should take is letter B orfeel the door first using the back of your hand.
Answer: Option (b) is the correct answer.
When you have to escape through the fire then it is better to check the door by slightly touching it through the back of your hand.
In this way you will have the idea that by going through the door would be safe or not and how risky it would be to pass through it.
Thus, we can conclude that the action of feeling the door first using the back of your hand should be taken by you.
How many chemical bonds would you expect "ekasilicon" to form? and what atomic mass would you expect "ekasilicon" to have? why?
For the answer to the question above askingHow many chemical bonds would you expect "eka-silicon" to form? I believe the answer is 4 chemical bond will"eka-silicon" form.
For the question, what atomic mass would you expect "eka-silicon"?
The answer is 72 (g/mol)
because, it's in between gallium and arsenic so if gallium's atomic mass is 70 and arsenic's atomic mass is 75, 72 is right between them
Negative ions are usually formed from: metals nonmetals
Non metals are electronegative in nature whereas metals are electropositive. A non-metal accepts electron and gains negative charge whereas metals lose eletrons and gains positive charge.Hence correct answer is non-metals.Hope this helps!
The Answer Is Non-Metals
The Valence Shell Electron Pair Repulsion Theory, abbreviated as VSEPR theory, is based on the premise that there is a repulsion between the pairs of valence electrons in all atoms, and the atoms will always tend to arrange themselves in a manner in which this electron pair repulsion is minimalised.What does the VSEPR theory state about electron pairs? ›
The valence shell electron pair repulsion (VSEPR) theory is a model used to predict 3-D molecular geometry based on the number of valence shell electron bond pairs among the atoms in a molecule or ion. This model assumes that electron pairs will arrange themselves to minimize repulsion effects from one another.What does the VSEPR theory predict valence electrons? ›
The Valence Shell Electron Repulsion (VSEPR) model can predict the structure of most molecules and polyatomic ions in which the central atom is a nonmetal; it also works for some structures in which the central atom is a metal.What is VSEPR theory based on the fact that the electron groups in the valence shell of a central atom will? ›
The valence shell electron-pair repulsion (VSEPR) model is used to predict the shapes of molecules and polyatomic ions. VSEPR is based on the idea that the “groups” or “clouds” of electrons surrounding an atom will adopt an arrangement that minimizes the repulsions between them.What is the VSEPR theory quizlet? ›
VSEPR Theory. states that the repulsion between electron pairs causes molecular shapes to adjust so that the valence-electron pairs stay as far away as possible.What does VSEPR theory state about the shape of a molecule? ›
According to VSEPR theory, the shape of a molecule is related to the organization of the central atom's valence shell electrons. The valence shell electrons are all negatively charged and therefore are constantly repelling each other. This repulsion is what gives a molecule its three-dimensional shape.What are the two main points of VSEPR theory? ›
- The number of valence shell electron pairs around the core atom determines the form of a molecule.
- Because their electron clouds are negatively charged, pairs of electrons in the valence shell repel one another.
Find the number of lone pairs on the central atom by subtracting the number of valence electrons on bonded atoms (Step 2) from the total number of valence electrons (Step 1). Divide the number of VEs not in bonds (from Step 3) by 2 to find the number of LPs.What is the VSEPR theory electron domain? ›
Electron Domain – The region in which electrons are most likely to be found (bonding and nonbonding). A lone pair, single, double, or triple bond represents one region of an electron domain. H2O has four domains: 2 single bonds and 2 nonbonding lone pairs. Electron Domain may also be referred to as the steric number.What is VSEPR theory and what does the theory predict? ›
Valence shell electron-pair repulsion theory ( VSEPR theory) enables us to predict the molecular structure, including approximate bond angles around a central atom, of a molecule from an examination of the number of bonds and lone electron pairs in its Lewis structure.
valence-shell electron pair repulsion (VSEPR): Electron pairs will repel each other such that the shape of the molecule will adjust so that the valence electron-pairs stay as far apart from each other as possible.Why are valence electrons important in VSEPR? ›
The premise of VSEPR is that the valence electron pairs surrounding an atom tend to repel each other. The greater the repulsion, the higher in energy (less stable) the molecule is. Therefore, the VSEPR-predicted molecular geometry of a molecule is the one that has as little of this repulsion as possible.Does VSEPR count lone pairs? ›
According to this model, valence electrons in the Lewis structure form groups, which may consist of a single bond, a double bond, a triple bond, a lone pair of electrons, or even a single unpaired electron, which in the VSEPR model is counted as a lone pair.How is VSEPR used to predict the electron group geometry? ›
The VSEPR predicted shapes of molecules can be found in a systematic way by using the number of electron pairs to determine the shape of the molecules. To predict the shape of the molecules, first draw out the Lewis structure of the molecule. On the Lewis diagram, identify the central atom.What happens to electron pairs according to VSEPR when a molecule is formed? ›
According to the VSEPR theory, what happens to electron pairs when a molecule is formed? When bonding occurs, electron pairs form negative ions. Electron pairs move away from each other to more electrostatically balanced positions.What is VSEPR theory molecular and electron geometry? ›
The basic idea in molecular shapes is called valence shell electron pair repulsion (VSEPR). It basically says that electron pairs, being composed of negatively charged particles, repel each other to get as far away from each other as possible.