Answer:
False
Explanation:
In every substance, there is a valence band and there is a conduction band. The gap between the valence band and the conduction band determines Whether a substance is a conductor or an insulator.
Conductors have a narrow gap between the valence band and the conduction band while insulators have a large gap between conduction band and insulation band. However, elements with a large number of electrons in the valence band are non conductors.
The density of benzene is 0.879g/mL. The volume (with 1 decimal) of 131.9g sample of benzene is how many mL?
Answer:
150.1 mL
Explanation:
Step 1: Given data
Density of benzene (ρ): 0.879 g/mLMass of the sample of benzene (m): 131.9 gVolume of the sample of benzene (V): ?Step 2: Calculate the volume of the sample of benzene
Density is an intrinsic property. It is equal to the quotient between the mass and the volume of the sample of benzene.
ρ = m/V
V = m/ρ
V = 131.9 g/(0.879 g/mL)
V = 150.1 mL
Are the nuclei of all atoms
a) Positive
b) Negative
c) Neutral
The simplest method to convert an alcohol to an alkyl halide is by reacting the alcohol with concentrated HCl, HBr, or HI. Complete the mechanism and draw the intermediates and final products for the reaction of 1,3-dimethylcyclohexanol with concentrated HCl. Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the grid and connecting them with bonds, including charges where needed. Indicate the mechanism by drawing the electron-flow arrows on the molecules. Arrows should start on an atom or a bond and should end on an atom, bond, or where a new bond should be created.
Answer:
B ska Uffculme u to quell torso
4. How many grams of acetylene would be given off if the limiting reagent in the reaction is calcium carbide and you start with 2.00 g
Answer:
0.78 g of acetylene.
Explanation:
The equation of the reaction is;
CaC2(s) + 2H2O (l) ------> Ca(OH)2(aq) + C2H2(g)
We have been told that CaC2 is the limiting reactant.
Number of moles of CaC2 = 2g/ 64 g/mol = 0.03 mol
If 1 mole of CaC2 yields 1 mole of acetylene
0.03 moles of CaC2 yields 0.03 moles of acetylene
Mass of acetylene = number of moles * molar mass
Molar mass of acetylene = 26 g/mol
Mass of acetylene = 0.03 moles * 26 g/mol
Mass of acetylene = 0.78 g of acetylene.
What type of intermolecular force tightly attracts
the gecko's feet to the surface it walks on?
o covalent bonding
O hydrogen bonding
O ionic bonding
Van der Waals forces
Answer Van der Waals Forces
Explanation:
right on EDGE 2021
Gecko's feet easily adhere to the wall and floor by the Van der Waals forces of attraction between the surface and its feet. Thus option d is correct.
What is Van der Waals force?Van der Waals force is a kind of intermolecular attractive force between two particles which is comparatively weaker than other forces like dipole force, covalent and ionic force.
Because of the minute hair-like projections on the underside of their feet, geckos are renowned for being skilled climbers. Studies revealing that they are coated with an ultra-thin layer of lipid molecules in an upright orientation.
Each of those minuscule hairs, known as setae, breaks off into hundreds of even smaller bristles, or spatulae. It has long been understood that the so-called van der Waals forces, or the attractive and repulsive forces between two dipole molecules, become important at microscopic size scales.
To find more on intermolecular forces, refer here:
https://brainly.com/question/17111432
#SPJ2
Write a balanced equation describing the reduction of H2SeO4 by SO2 to produce selenium. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
Answer:
[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]
Explanation:
We are to write a balanced equation from the information given above by including the states of their matter according to SATP conditions;
[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]
From above;
The oxidizing agent is [tex]\mathbf{H_2SeO_{4(aq)} }[/tex]
The reducing agent is [tex]\mathbf{SO_{2(aq)} }[/tex]
Which choice best describes what would happen if a cube with a density of 0.2 g/mL were placed in a container of water?
A. It would float with about 80% of the cube below the surface of the water and 20% above the surface.
B. It would float with about 20% of the cube below the surface of the water and 80% above the surface.
C. It would sink to the bottom.
D. It would fly away.
Answer:
A. It would float with about 80% of the cube below the surface of the water and 20% above the surface.
Explanation:
The choice that best describes what happens to cube of the given density value is that it would float with about 80% of the cube would be below the surface of the water and 20% above the surface.
Density is the mass per unit volume of a substance. The more mass a body has relative to volume, the great it's density. In short, density is directly proportional to mass and inversely related to volume.
The density of water is 1g/mL
If the density of the cube were to be the same with that of water, the substance will just mix up with water .
Here the density is less than that of water.
The density is 0.2g/mL
Therefore, 20% will stay afloat and 80% will be below the surface of the water.
Which of the following is NOT a major area of scientific study?
Answer:
Hate 2 break it 2 u foo but there's no option for me 2 choose....
If a soccer ball has a mass of 0.43 kg and radius of approximately 22 cm, calculate the density of the soccer ball in g/cm? (V. = (4/3)Arº) sphere
Answer: 0.0096g/cm^3
Explanation: density = mass/1.33*pi*r^3
Which way does heat transfer from warm objects to cool objects, or from cool objects to warm objects?
What causes a spectrum of colors to appear when light moves through a prism?
Absorption of light waves
O Refraction of light waves
Transmission of light waves
Reflection of light waves
Answer:
It is refracted out, B
Explanation:
When the light travels through the prism, it refracts the colors out of it. In which a rainbow sort coloration is released from the other side.
Answer:
Explanation:
Refraction of light waves
if mixture didn't exist how would life be different
PLEASEEE QUICKKKK
Answer:
boring
Explanation:
without meaning
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminol into a total volume of 75.0 mL of H2O . What is the molarity of the stock solution of luminol
Answer:
0.753M
Explanation:
Molecular formula of luminol is as follows: C8H7N3O2
Molecular formula of the luminol (C8H7N3O2) = 12(8) + 1(7) + 14(3) + 16(2)
= 96 + 7 + 42 + 32
= 177g/mol
mole of luminol = mass/molar mass
mole = 10 ÷ 177
mole = 0.0565 mol
Molarity can be calculated using the formula: Molarity = mol/volume (L)
Volume of water = 75.0 mL = 75/1000
= 0.075L
Molarity (M) = 0.0565 ÷ 0.075
The molarity of the stock solution = 0.753M
Some organisms are composed of only ONE cell. *
O True
O false
5/10
When you put sodium metal in liquid ammonia, what is the
intermolecular' attraction between Nations and NH3
molecules?
a Covalent bonds
Answer: ion dipole
Explanation: ck-12 said it was correct
48,000,000,000 g scientific notation
Answer:
We want to express it in scientific notation.
We will count how many places to the left we move We utilize scientific notation to simplify calculation Hence we move 10 to the left Our answer is 4.8 × 10^10why do pengiuns have beards
Answer:
no they do not
Explanation:
Answer:
It's just...Hair grown there...i guess it just grows as a male humans would
Explanation:
hope this helps.
What happens at all convergent plate boundaries?
Explanation:
At convergent plate boundaries two plates are moving towards one another and different scenarios are in play.
Most importantly, at these margins the crust is being destroyed.
At continental - continental crust margin, there is an uplift because the density of the two crust is similar and lesser than that of the mantle below. At continental - oceanic crust margin, subduction zones are found where the denser oceanic crust sinks beneath into the mantle. This is also the case with ocean - ocean convergence zone.Some of the features found at this margin include, oceanic trenches, accretionary wedges, volcanic islands, earthquakes
How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O ?
Answer:
The answer is "35 atoms".
Explanation:
The Formula for isopropyl alcohol is: [tex]C_3H_8O[/tex]
In 1 molecule of [tex]C_3H_8O[/tex] = 8 atoms of hydrogen
In 4 molecule of = atoms of hydrogen
According to the given formula [tex]C_3H_7O[/tex]
In 5 molecule of [tex]C_3H_7O[/tex] [tex]= 5 \times 7 = 35[/tex] atoms of hydrogen.
PLEASE HELP PLEASEEESSSS
Answer:
The answer is C or 3 which ever but it that one
Explanation:
What percent of iodine is left after 5 half-lives have passed? will brainlist
Answer:
3.125%
Explanation:
After 1 half life it remains 50%
After 2 half lines it remains 25%
After 3 half lines it remains 12.5 %
After 4th half life it remains 6.25%
After 5th half life it remains 3.125%
Which statement best describes how photosynthesis follows the law of conservation of mass?
O The volume of water used by this process is equal to the volume of water released from plant leaves at night.
O The cells in plants absorb the same amount of energy from the Sun that humans need when burning sugars during digestion.
O The number of oxygen atoms in the reactants used by this process equals the total number of oxygen atoms in the products.
The amount of carbon dioxide gas absorbed by one plant is equal to the amount of carbon dioxide gas exhaled from one human,
11
Preston
Answer:
O The number of oxygen atoms in the reactants used by this process equals the total number of oxygen atoms in the products.
Explanation:
The statement that best describes how photosynthesis follows the law of conservation of mass is that the number of oxygen atoms in the reactants used by this process is equal to the total number of oxygen atoms in the products.
The equation of photosynthesis reaction is given as:
6CO₂ + 6H₂O → C₆ H₁₂ O₆ + 6O₂
According to the law of conservation of mass, matter is neither created nor destroyed during the course of a chemical reaction.
By the virtue of this, the number of oxygen atom on both sides of the expression must be the same. Also, the number of carbon and hydrogen atoms must also be the same.
Describe how the energy in ocean waves could be transformed into electrical energy.
Answer:
ocean waves are converted to electricity with wave energy converter, or WEC, devices. ... The surface portion moves faster than the submerged part, and the WEC converts that relative motion into electricity
The energy in ocean waves that should be transformed into electrical energy is because of Buoyant objects.
Energy in ocean waves transformation:Buoys and turbines should be considered as the two examples of devices that can be used to capture the energy from the ocean's movement.
Buoys are considered to be structures that float on the sea and move up and down with the motion of the waves.
Learn more about energy here; https://brainly.com/question/17172186
can u pls help me with this question
i think its volume but im not 100% sure
Answer:
D.
Explanation:
cuz liter is volume
A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go
The spring recoils.
Answer: When the spring is recoiling
Explanation:
Answer:
When the spring is recoiling
Explanation:
Moving glaciers can cause erosion ?
True or false
Plz explain
Answer:
true
Explanation:
plucking and abrasion
abrasion is when a glacier scrapes rocks below and plucking is when sediments are picked up by a glacier
The accepted density of water at 25oC is 0.99707 g/mL. Calculate the percent error forbothBeakers A and B.
Answer:
Percent error for beaker A is 0.26%
Percent error for beaker B is 0.25%
Explanation:
The remaining part of the question is shown in the attachment below.
For beaker A
Mass of water = 9.997 g
Volume = 10mL
First, we will determine the experimental density
From
Density = Mass / Volume
∴ Density = 9.997g / 10mL
Density = 0.9997 g/mL
To calculate the percent error
Percent error = (Error/True value) × 100%
Error = Experimental value - True value
From the question, True value = 0.99707 g/mL
Experimental value = 0.9997 g/mL
∴ Error = 0.9997 g/mL - 0.99707 g/mL
Error = 0.00263 g/mL
Then,
Percent error = (0.00263/0.99707) × 100%
Percent error = 0.26377%
Percent errror ≅ 0.26%
Hence, percent error for beaker A is 0.26%
For beaker B
Mass of water = 9.9956 g
Volume = 10mL
Also, we will first determine the experimental density
From
Density = Mass / Volume
∴ Density = 9.9956g / 10mL
Density = 0.99956 g/mL
To calculate the percent error
Percent error = (Error/True value) × 100%
Error = Experimental value - True value
True value = 0.99707 g/mL
Experimental value = 0.99956 g/mL
∴ Error = 0.99956 g/mL - 0.99707 g/mL
Error = 0.00249 g/mL
Then,
Percent error = (0.00249/0.99707) × 100%
Percent error = 0.24973%
Percent errror ≅ 0.25%
Hence, percent error for beaker B is 0.25%
if kept at a constant temperature, what is the concentration at 865s if the initial concentration was 0.0225M
Answer:
[tex][SO_2Cl_2]=0.0175M[/tex]
Explanation:
Hello!
In this case, considering that the decomposition reaction of SO2Cl2 is first-order, we can write the rate law shown below:
[tex]r=-k[SO_2Cl_2][/tex]
We also consider that the integrated rate law has been already reported as:
[tex][SO_2Cl_2]=[SO_2Cl_2]_0exp(-kt)[/tex]
Thus, by plugging in the initial concentration, rate constant and elapsed time we obtain:
[tex][SO_2Cl_2]=0.0225Mexp(-2.90x10^{-4}s^{-1}*865s)[/tex]
[tex][SO_2Cl_2]=0.0175M[/tex]
Best regards!
Which two mantle hot spots are located at mid-ocean
ridges?
Answer:
This region of thick, hot crust and mantle extends 1,300 kilometers north and south of the Iceland hotspot and some 1,000 kilometers north and south of the Azores hotspot. Together, the two hotspots appear to be feeding a huge supply of magma to nearly the entire northern segment of the Mid-Atlantic Ridge.
Explanation:
please give me a heart
Answer:
Easter island
Emitted energy is reported in megaelectron volts (MeV), where one MeV is equal to one million electron volts. How much energy is emitted in this reaction?
Answer:
1.44
Explanation:
Science happened in my brain