Why is electrical conductivity a resourceful property of metals like copper, silver, and aluminum?
Answers
Answer:
The electrical conductivity of metals come from the fact that their outer electrons have been delocalised (meaning that the elections are not locked into atoms but can move freely throughout the metal ) .
And , the electrical conductivity of a metal is determined by the ease of movement of the electrons past the atoms under the influence of an electric field.
Related Questions
A _________ mixture is not well mixed.
A.) Saturated
B.) Insoluble
C.) Homogeneous
D.) Heterogeneous
Answers
_cubr +_F2 —> Cuf +_ Br2
Answers
Answer:
2CuBr +1 F2 ----> 2CuF + 1 Br2
Explanation:
2CuBr +1 F2 ----> 2Cuf + 1 Br2
Check answer
Cu is 2 Cu is 2
Br is 2 Br is 2
F is 2 F is 2
A sample of a compound contains 24 grams of carbon and 64 grams of oxygen. What
is the empirical formula of this compound?
Answers
Answer:
CO2
Explanation:
it's the simplest whole number ratio of atoms of each element in the compound.
Answer:
C2O4
Explanation:
Compare and contrast carbon dioxide and water.
Answers
A student wants to use the lever to lift the book. At
which point should she push downward to use the
least amount of force to lift the book?
Answers
Since d is the furthest point from the fulcrum the least amount of downward force need be applied.
Question 2
Put the events below in the order in which they happened.
a) The marble is moved up the ramp using a pulley system.
b) The marble is placed on a wooden sled.
c) Iron wedges are used to break the massive marble.
d) Masons begin carving the marble.
b, a, c, d
b, c, a, d
c, d, b, a
c, b, d, a
Answers
Answer:
The event placed in order is;
b, a, c, d
Explanation:
1) b) The marble is placed on a wooden sled
Before the marble is lifted up the ramp, it is placed on a wooden sled that allows the pulley system which can be attached to the wooden sled to lift it up the ramp
2) a) The marble is moved up the ramp using the pulley system
The attached pulley system is then used to move the marble up the ramp
3) c) Iron wedges are used to break the massive marble
The massive marble is broken into pieces that can be worked upon by each mason
4) d) Masons begin carving the marble
The masons (more than one mason) begin carving the pieces of marbles into shape
. A frog’s heart has ___________ chambers. Two atrium and _____ ventricle.
Answers
Answer:
A frog heart has three chambers.two atrium and one ventricle is answer
Explanation:
I hope it's helpful!
As rocks erode from Earth's surface, they are replaced by the process ____of
A. recrystallization
B. uplift
C. weathering
D. foliation
Answers
Answer:
B. uplift is answer
Explanation:
may be this is helpful!
Complete combustion of a 0.600-g sample of a compound in a bomb calorimeter releases 24.0 kJ of heat. The bomb calorimeter has a mass of 1.30 kg and a specific heat of 3.41 J/(gi°C). If the initial temperature of the calorimeter is 25.5°C, what is its final temperature?
Answers
The final temperature, t₂ = 30.9 °C
Further explanationGiven
24.0 kJ of heat = 24,000 J
Mass of calorimeter = 1.3 kg = 1300 g
Cs = 3.41 J/g°C
t₁= 25.5 °C
Required
The final temperature, t₂
Solution
Q = m.Cs.Δt
Q out (combustion of compound) = Q in (calorimeter)
24,000 = 1300 x 3.41 x (t₂-25.5)
t₂ = 30.9 °C
Answer:
a) 30.9
Explanation:
edge 2021
Why is there an earthquake and volcano pattern?
answer without stealing from g.oogle please.
Answers
Answer:
The description and the illustration throughout the question are summarized below.
Explanation:
Yes, there's a pattern of earthquakes as well as volcanoes even though, destruction, injury, as well as ultimately harm all occur forward to volcanoes as well as earthquakes. Theoretically, there are many 2 kinds of surfaces, oceanic as well as continental. Multiple sorts of movement usually happen together across numerous categories of boundary plates.Please Help!!!!!!!!!!!!!
Answers
Answer:
The answer is B, 106
Explanation:
looked it up
Over the past 60 years, the level of carbon dioxide in the atmosphere has been continually increasing. Many scientists hypothesize that this increase has led to an imbalance in the carbon cycle and a climatic trend known as global warming.
In which of the following ways could humans help the carbon cycle return to normal?
Cap volcanoes so that they do not release more carbon dioxide
cut down trees and other large plants that depend on carbon dioxide
reduce the amount of fossil fuels they combust
pump nitrogen and oxygen into the air to help rebalance the atmosphere
Answers
Answer:
C.
reduce the amount of fossil fuels they combust
Explanation:
study island
balence the following equation : _____ NH3 --------> _____ N2 + _____ H2
pls can i have the explanation too
Answers
2 NH3 -> 1 N2 + 3 H2
Explanation:
That would be the answer to this
What are the main organs for the respiratory system?
Answers
Answer:
lungs and blood vessels, airway
Explanation:
because the respiratory system are a system that helps people breate. the lungs breathe in oxygen and then breathe out carbon dioxide. the blood vessels carries the oxygen into the body to other part of the system in the body that needed oxygen to make glucose.
Madame puts a teabag in her mug of water. Before she has a chance to stir the tea, she hears a sound and goes to see what it was. When she comes back, the tea is distributed throughout the mug. It looks like someone stirred it, but no one else is home. What happened?
Answers
Answer:
See the answer below
Explanation:
What really happened was that the component molecule present in the teabag became hydrated as a result of dissolution in water. Once dissolved, the molecules start to move about from the region of higher concentration - that is, the tea bag - to the region of lower concentration until the molecules become uniformly diffused throughout the water in the mug.
How many moles of hydrogen atoms are there in one mole of C6H12O2
Answers
In 1 molecule of the compound C₆H₁₂O₂ there are 12 moles of hydrogen atoms
Further explanationGiven
C₆H₁₂O₂ compound
Required
moles of Hydrogen
Solution
In a compound, there is a mole ratio of the constituent elements.
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
In the C₆H₁₂O₂ compound, there are 3 forming elements: C, H and O
The number of each element is indicated by its subscript
C: 6 moles
H = 12 moles
O = 2 moles
Jonathan used the following soil triangle to identify a sample of soil as sandy clay. Which description of soil likely allowed Jonathan to make this identification.
A. Mostly large grains, with a sticky texture, 55% sand, 40% clay, 5% silt.
B. Mostly large grains, with a gritty texture, 45% sand, 5% clay, 45% silt.
C. Mostly small grains, with a smooth texture, 30% sand, 5% clay, 65% silt.
D. Mostly small grains, with a sticky texture, 30% sand, 50% clay, 20% silt.
Answers
Answer:
Mostly large grains, with a sticky texture, 55% sand, 40% clay, and 5% silt
Explanation: I took the test, hope it helps.
Mostly large grains, with a sticky texture, 55% sand, 40% clay, 5% silt. The correct option is A.
What is soil triangle?One side of the triangle represents sand, the other side represents clay, and the third side represents silt.
A soil texture triangle is used to classify a soil's texture class. The percentages of sand, silt, and clay are scaled on the sides of the soil texture triangle.
Clay percentages are read across the triangle from left to right. Silt is read from top to bottom, upper right to bottom.
Jonathan used the soil triangle to identify a sample of soil as sandy clay; the soil description that allowed Jonathan to make this identification is 55% sand, 40% clay, and 5% silt, with mostly large grains and a sticky texture.
Thus, the correct option is A.
For more details regarding soil triangle, visit:
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How many electrons will oxygen have to have to have a +2 charge?
Answers
Answer: here is your answer hope this helps I’m sorry if I get it wrong
Explanation:
This means that the nuclei of all oxygen atoms have eight protons. A neutral oxygen atom will also have eight electrons. In an oxygen ion with a 2− charge, the number of protons is still 8, but the number of electrons is 10. This results in the oxygen ion having an octet (8) of valence electrons.
Need help don’t understand this??!
Answers
Answer:
US. With an installed capacity of 3,639MW in 2018, the US is the leading producer of geothermal energy across the world, producing 16.7 billion kilowatt hours (kWh) of geothermal energy throughout the year. ...
Indonesia. ...
Philippines. ...
Turkey. ...
New Zealand. ...
Mexico. ...
Italy. ...
Iceland.
The order is B, C, A for highest thermal energy to lowest thermal energy. The highest thermal energy has the most space between particles and the lowest thermal energy has more spaces between particles.
How many grams of aluminum oxide (Al2O3) will be formed from 10.0 grams of aluminum (Al)? 4 AL + 3 02 --> 2 AL203
Answers
Answer:
Mass = 18.9 g
Explanation:
Given data:
Mass of Al₂O₃ formed = ?
Mass of Al = 10.0 g
Solution:
Chemical equation:
4Al + 3O₂ → 2Al₂O₃
Number of moles of Al:
Number of moles = mass/molar mass
Number of moles = 10.0 g/ 27 g/mol
Number of moles = 0.37 mol
Now we will compare the moles of Al and Al₂O₃.
Al : Al₂O₃
4 : 2
0.37 : 2/4×0.37 = 0.185 mol
Mass of Al₂O₃:
Mass = number of moles × molar mass
Mass = 0.185 mol × 101.9 g/mol
Mass = 18.9 g
A person stands on the floor. What does Newton's third law say must happen
A . The floor pushes up on the person
B. the floor will accelerate
C. the person will accelerate
D. Gravity pulls down on the floor.
Answers
Why are models used to represent Atoms
Answers
Answer:
C
Explanation:
Different scientific models are used to represent an atom. It is because atoms are too small to see and to study their structure and electronic properties we need a model.
What are scientific models?Scientific models are visual representations or mathematical expression to make a scientific concept easy to understand. Atomic models are scientific models to represent the atomic structure and properties.
There are various theoretical models for atomic structure in which the latest one is Bohr's model. This model suggests that the electrons are revolving around the nucleus through circular paths of definite energies.
Subatomic particles, electrons, protons, and neutrons are microscopically small and we can't make its clear picture by reality. Therefore, using suitable experiments and assumptions scientists are proposing various theoretical models for atomic structure.
To find more on atomic models,refre here:
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In multicellular organismscells that become specialized to perform a specific function are called?
A. Organelle
B. Tissue
C. Organ
D. Epithelial
Answers
Answer:
Answer:
C. Organ
Explanation:
definition- "In biology, an organ is a collection of tissues that structurally form a functional unit specialized to perform a particular function.
What is the name of the ability to use up energy in one second
Answers
Answer:
Work
Explanation:
Work is defined as the ability to use energy in one second and its SI unit is same as energy that is joule.
Work refers to the energy utilized to displace an object over a distance by an external force in one direction and in given time period which can be one second as well.
Hence, the correct answer is "work".
he dose of a medicine is 3.0 mg/kg of body mass. Calculate the dose in milligrams for a 112-lb person.
Group of answer choices
300
740
150
3.0 × 105
74
1500
Answers
3. How does the wave change if the volume increases?
Answers
Answer:
When you increase the volume of the tone, you are adding energy to the sound wave, resulting in larger vibrations
Explanation:
An ionic bond is a bond that forms between..
help
Answers
Answer:
ions with opposite charge
Explanation:
ionic bond is formed between oppositely charged ions in a chemical compound.
Answer: ions with opposite charges
Explanation:
Which BEST explains why the ice cube sank in the liquid?
Answers
Answer:
The liquid could be cooking oil
Explanation:
Density contributes to sinking or floating. If this is vegetable oil of something like that, the ice cube will sink.
Frank has a paper clip. It has a mass of 9g and a volume of 3cm3. What is
its density?
A. 1/3 g/cm3
O B. 3 g/cm3
C. 39 g/cm3
D. 27 g/cm3
Answers
Answer:
B. 3 g/cm³
Explanation:
Given data:
Mass of paper clip = 9 g
Volume of paper clip = 3 cm³
Density of paper clip = ?
Solution:
Formula:
d = m/v
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
by putting value,
d = 9 g / 3 cm³
d = 3 g/cm³
the diagram below represents the organization levels of living things. Which of the following examples represents the missing organizational level?
Answers
Answer:
The heart
Explanation:
Answer:
The heart
Explanation:
Because its an organ and i got it right ;)
