Answer:
1.33 × 10⁻³ m³
Explanation:
Step 1: Given data
Side of the cube (d): 11.0 cm
Step 2: Calculate the volume of the cube (V)
We will use the following expression.
V = d³
V = (11.0 cm)³
V = 1.33 × 10³ cm³
Step 3: Convert "V" to m³
We will use the conversion factor 1 m³ = 10⁶ cm³.
1.33 × 10³ cm³ × (1 m³ / 10⁶ cm³) = 1.33 × 10⁻³ m³
The SN1 reaction yields Entry field with incorrect answer two (number) products. This is because ______________________. Entry field with incorrect answer The carbocation that forms can react with CH3OH from the top side of the molecule. The carbocation that forms can react with H2O from either the top or bottom side of the molecule. The carbocation that forms can react with either nucleophile (H2O or CH3OH) from the top side of the molecule. The carbocation that forms can react with H2O from the bottom side of the molecule. The carbocation that forms can react with CH3OH from either the top or bottom side of the molecule. The carbocation that forms can react with either nucleophile (H2O or CH3OH) from the bottom side of the molecule. The carbocation that forms can react with H2O from the top side of the molecule. The carbocation that forms can react with CH3OH from the bottom side of the molecule. The carbocation that forms can react with either nucleophile (H2O or CH3OH) from either the top or bottom side of the molecule.
Answer:
Four substitution products are obtained. The carbocation that forms can react with either nucleophile (H2O or CH3OH) from either the top or bottom side of the molecule
Explanation:
An SN1 reaction usually involves the formation of a carbocation in the slow rate determining step. This carbocation is now attacked by a nucleophile in a subsequent fast step to give the desired product.
However, the product is obtained as a racemic mixture because the nucleophile may attack from the top or bottom of the carbocation hence both attacks are equally probable.
The attacking nucleophile in this case may be water or CH3OH
For the following questions, use a periodic table and your atomic calculations to find the unknown information about each isotope:
You have a Helium Isotope with 2 neutrons. What is the mass number?
2
4
4.0026
6
Answer:
Option B is correct.
4
Explanation:
We know that an atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example, if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
In given problem we are given with 2 neutrons of helium. We know that the atomic number of He is 2. Thus Mass number of He is,
Number of neutrons + number of proton
2 + 2 = 4
Thus, option B is correct.
How many ounces are in 23.0 tons
Write the number 4.92 x 10-3 from scientific notation to regular.
Please help?????
Explanation:
4.92*10-3=4.92/10^3=
4.92/1000=0.00492
what is also called vapor?
Answer:
Another word for vapor is gas.
Answer:
Another name for vapour is gas
What causes ions to form?
Answer:
Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the
Explanation:
hope this helps
Answer:
Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms.
Explanation:
Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.
16. A baseball has a mass of 1500 grams and displaces 500 ml. of water. What is
it's density?
Answer:
3.00 g/mL
Explanation:
Step 1: Given data
Mass of the baseball (m): 1500 g
Volume of the baseball = Volume of water displaced (V): 500 mL
Density of the baseball (ρ): ?
Step 2: Calculate the density of the baseball
The density is equal to the mass divided by the volume.
ρ = m/V
ρ = 1500 g/500 mL
ρ = 3.00 g/mL
Why is crushability alone not enough to
verify the identity of these materials?
Answer:same but answer
Explanation:yeah confusing
Which activity demonstrates chemical weathering?
A= dissolving of limestone by acid rain
B= grinding of talc into a powder
C=freezing of water in the cracks of a sandstone sidewalk
D= abrasion of a stream bed by tumbling rocks
The answer is A, to my brain power ig B)
Chemical weathering is the decomposition of rocks and minerals by chemical means. Dissolving limestone by acid rain is an example of chemical weathering. Hence, option A is correct.
What is weathering ?Weathering is the process of decomposition of rocks and minerals in the earth by some physical or chemical factors. Weathering by heat, pressure and wind are called physical weathering.
Reaction with acids, water or air also lead to weathering of rocks. The chemical reaction taking place there can decompose the rock and form new products make cracks and color changes in the rocks.
Lime stones are made of calcium carbonate. When limestone reacts with an acid , it decomposes into its salt and carbon dioxide. Therefore, it is an example of chemical weathering. Hence, option A is correct.
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How do you calculate the amount of reactants and products in a chemical reaction?
Mass of products is exactly equal to mass of reactants. A mole-mole factor is a ratio of the moles for any two substances in an equation.
What is the law of mass of conservation ?The law of mass of conservation states that the the mass of the reactant is exactly equal to the mass of the product.
According to this law, matter can be neither created nor be destroyed. The mass of collection of objects never changes, no matter how the parts are rearranged.
To calculate the amount of atoms that are reacting, and they always be the same as the product because the law of conservation states that no matter can be formed or destroyed, as transferred.
Thus, the amount of reactants and products in a chemical reaction is calculated by the law of mass of conservation.
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What was the measurable value Avogadro used to build his scale, and how would you describe the similarity between that concept and the modern-day concept of electronegativity?
Answer:
oxygenicity values
Explanation:
The measurable value upon which Avogadro established his scale is called oxygenicity values.
It is similar to the concept of modern-day electronegativity in that when two electrified bodies are in contact, the electrical potential between the bodies in contact is a measurable value.
This idea bears a striking similarity to our modern-day concept of electronegativity which is defined as a measure of the ability of an atom in a bond to attract electrons towards itself.
Give the percent yield when 28.16 g of CO2 are formed from the reaction of 8.000 moles of C8H18 with 16.00 moles of O2.
Answer:
Percent yield of CO₂ is 6.25 %.
Explanation:
Given data:
Percent yield of CO₂ = ?
Actual yield of CO₂ = 28.16 g
Number of moles of C₈H₁₈ = 8.000 mol
Number of moles of O₂ = 16.00 mol
Solution:
Chemical equation:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
Now we will compare the moles of C₈H₁₈ and O₂ with CO₂.
C₈H₁₈ : CO₂
2 : 16
8.000 : 16/2×8.000 = 64 mol
O₂ : CO₂
25 : 16
16 : 16/25×16= 10.24 mol
Less number of moles of CO₂ are produced from 16 moles of O₂. it will limit the yield of CO₂.
Grams of CO₂ produced:
Mass = number of moles × molar mass
Mass = 10.24 mol × 44 g/mol
Mass = 450.56 g
Percentage yield of CO₂:
Percentage yield = actual yield / theoretical yield × 100
Percentage yield = 28.16 g/ 450.56 g× 100
Percentage yield = 6.25 %
When you drive down a mountain, what makes your ears experience those interesting and sometimes uncomfortable sensations?
Answer:
When you drive down a mountain, what makes you experience those interesting and sometimes uncomfortable sensations? The air pressure outside is going up. As that is happening, the air pressure in your ear drum is being compressed. The air from your throat is going up.
Explanation:
What kinds of things are made up of cells?
Answer:
every living thing
Explanation:
its right
Answer:
Everything is made up of cells
Explanation:
Humans, animals, plants, etc.
1. Isotopes of the same element vary in
the number of
present in the
nucleus.
A.neutrons
B.protons
C.electrons
Neutrons as protons determine the element
How are xylem and phloem related to a plant's growth
A: Xylem transports and stores water and water-soluble nutrients in vascular plants. Phloem is responsible for transporting sugars, proteins, and other organic molecules in plants.
List the two factors that affect ionic bond
Answer:
ionization energy and electronegativity
Explanation:
Nuclear power doesn't directly emit greenhouse gases, but it does leave behind dangerous nuclear _______.
Answer:
Waste.
Explanation:
"A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years. Radioactive wastes are subject to special regulations that govern their handling, transportation, storage, and disposal to protect human health and the environment. The U.S. Nuclear Regulatory Commission (NRC) regulates the operation of nuclear power plants."
How many grams are in 3.67 moles of lithium cyanide
Answer: 120.9 grams
Explanation:
Given the question : How many grams are in 3.67 moles of Lithium cyanide?
Chemical formula of lithium cyanide = LiCN
Molar mass of LiCN: Li = 6.941 ; C = 12, N = 14
LiCN = (6.941 + 12 + 14). = 32.941 g/mol
(Gram of substance / mole of substance) = (molar mass of substance / one mole)
(Gram of substance / 3.67) = (32.941 / 1)
= gram * 1 = 3.67 * 32.941
Gram of substance = 120.89347
= 120.9 grams
A particular element exists in two stable isotopic forms. One isotope has a mass of 78.9183 amu (50.69% abundance). The other isotope has a mass of 80.9163 amu (49.31% abundance). Calculate the average mass of the element and determine its identity.
Answer:
Average atomic mass = 79.9035 amu.
The given element is bromine.
Explanation:
Given data:
Mass of 1st isotope = 78.9183 amu
Percent abundance of 1st isotope = 50.69%
Mass of 2nd isotope = 80.9163 amu
Percent abundance of 1st isotope = 49.31%
Average atomic mass = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (50.69×78.9183 )+(49.31× 80.9163) /100
Average atomic mass = 4000.3686+ 3989.9828 / 100
Average atomic mass = 7990.3514 / 100
Average atomic mass = 79.9035 amu.
The given element is bromine.
what is a noble gas in the same period as Zr
Answer:
Xe
Explanation:
noble gas is in the last column of the periodic table.
Zr is in Period 5
What is responsible for the larger size of an anion in comparison with the atom from which it is form?
Answer:
electron-electron repulsion
Explanation:
When electrons add into valence shell of neutral elements, the element assumes a negative oxidation state. With this, the number of electrons having (-) charges will be larger than the number of protons having positive (+) charges. As a result, the extra electrons repel one another (i.e., like charges repel) and a larger radius is the result.
In contrast, when cations are formed, electrons are removed from the valence level (oxidation) producing an element having a greater number of protons than electrons. The larger number of protons will function to attract the electron cloud with a greater force that results in a contraction of atomic radius and a smaller spherical volume than the neutral unionized element.
To visualize, see attached chart that shows atomic and ionic radii before and after ionization of the elements.
the ions in KCL interact with water through what attractive force?
Answer:
electrostatic forces of attraction
How many anions are there in 1.50 g of MgBr2?
Answer:
9.75564x10^21
Explanation:
Moles of MgBr2=Mass/Molar Mass
=1.50grams/184.113g/mol
=0.0081mol(because the grams cancel out)
2 x 0.0081mol= 0.0162mol
0.0162 x 6.022 x 10^23(because avogadro's #)= 9.75564x10^21
hope this helps!!
9.75564x10^21 anions are there in 1.50 g of MgBr2
what are the difference between cation and anion ?Cations and anions are both ions, the cation are negatively charges ions where as anions are positively charged ions.
These ions are atoms or molecules either gain or loss of one or more valence electrons, giving the ion a net positive or negative charge.
If the chemical species has more protons than electrons, it carries a net positive charge. If there are more electrons than protons, the species has a negative charge. The number of neutrons determines the isotope of an element but does not affect the electrical charge.
Cations with a net positive charge like Silver Ag+, Hydronium: H3O+, Ammonium: NH4+ where as Anions with a net negative charge Hydroxide anion: OH-, Oxide anion: O2-, Sulfate anion:SO42-.
Moles of MgBr2=Mass/Molar Mass
=1.50grams/184.113g/mol
=0.0081mol(because the grams cancel out)
2 x 0.0081mol= 0.0162mol
0.0162 x 6.022 x 10^23= 9.75564x10^21
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How much force would it take to push a friend who has a mass of 70 kg to accelerate at the rate of 4 m/s2? F = M*A *
30 N
280 N
17.5 N
.057 N
Answer:
The answer is 280 NExplanation:
The force acting on an object can be found by using the formula
Force = mass × accelerationFrom the question
mass = 70 kg
acceleration = 4 m/s²
We have
force = 70 × 4
We have the final answer as
280 NHope this helps you
what is the composition of carbohydrates
how to convert anisole to salicylic acid
Answer:
ipfiyf8y97guog7
Explanation:
oyviyvhlvoyvhlvouuoupvpu
If the density of a substance is 15g/ml what would the volume be if it has
a mass of 10g?
Answer:
the answer would be 0.666 mL
Explanation:
10g is 66% of 15g
Jill likes to watch her dad cook. First, he puts liquid raw eggs in a hot pan, and the eggs get stiff. Then, he adds solid cheese to the pan and the cheese gets gooey.
The changes in the eggs and cheese illustrate that
A.
different substances can have different densities.
B.
different substances can have different volumes.
C.
different substances can react differently to heat.
D.
different substances can react differently to light.
Answer: c
Explanation:
different substances can react differently to heat.
Answer: c
Explanation:
different substances can react differently to heat.
I have a balloon below and I squeeze it until it is about to pop. This is decreasing the volume. What happens to the pressure inside? What are the molecules doing inside?
Answer:
Pressure goes up
Explanation:
The pressure is inversely proportional to the volume. So when volume is decreased the pressure rises.
The molecules are getting pushed closer together and more collisions occur which will also increase the temperature.
