Answer:
b) free ions
Explanation:
when an ionic compound melts, the charged ions are free to move. Therefore, molten ionic compounds do conduct electricity.
Molten NaCl or sodium chloride conducts electricity due to the presence of free ions (B).
Which two layers are approximately the same age?
Answer:
The bottommost layer in core sample 1 and the topmost layer in core sample 2.
Explanation:
Correct me if im wrong :)
Type the correct answer in the box. Isopropanol (C3H8O) is a key ingredient in some hand sanitizers. Suppose that 127 grams of isopropanol is dissolved in water. The volume of the solution is 1,250 milliliters. What is the molarity of the solution? Refer to the periodic table to help you answer. Express your answer to three significant figures. The molarity of the solution is M.
The molarity of the Isopropanol solution is 1.68 M.
How we calculate molarity?Molarity of any solution can be calculated as:
M = n/V, where
n = no. of moles
V = volume = 1,250mL = 1.250L
For this first we have to calculate the moles of Isopropanol (C₃H₈O), and it can be calculated as:
n = W/M, where
W = mass of C₃H₈O = 127 grams
M = molar mass of C₃H₈O = 60.1 g/mol
Moles of C₃H₈O = 127g / 60.1 g/mol = 2.1 moles
Now, we calculate the molarity of solution by using the above formula and by putting values as:
M = 2.1/1.250 = 1.68 M
Hence, 1.68 M is the molarity of the solution.
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how many grams is 3.845 kilograms?
Answer:
3845
Explanation:
Answer:
it is 3845 grams
Explanation:
which statement(s) is/are true about concentrations equilibrium
When light from one source, X, strikes a metal, electrons are ejected. When light from another source, Y, strikes the same metal, electrons are not ejected. Which best explains why this occurs? Light from source X has a higher intensity than light from source Y. Light from source X has a lower intensity than light from source Y. Photons of light from source X carry more energy than photons of light from source Y. Photons of light from source X carry less energy than photons of light from source Y.
Answer:
Photons of light from source X carry more energy than photons of light from source Y
Explanation:
According to Einstein's photoelectric equation, the kinetic energy of the emitted photoelectron depends on the energy of the incident photon and the work function of the metal.
For photoelectrons to be ejected from a metal surface, the energy of incident photon must be greater than the work function of the metal. If not, no electron is ejected.
The energy of photon X must be greater than the work function of the metal while the energy of photon Y is less than the work function of the metal. This brings us to the conclusion that the energy of photon X must be greater than that of photon Y.
Answer:
c
Explanation:
i got it right on edg2020
what is the boiling point of water in the celsius scale?
Answer:
100 Degrees C
Explanation:
Which of Earth's early sources of heat are not major
contributors to Earth's present-day internal heat?
Answer:
(1) extraterrestrial impacts, (2) gravitational contraction of the Earth's interior, and (3) the radioactive decay of unstable isotopes.
Explanation:
hope this helps
(1) Extraterrestrial impacts, (2) gravitational contraction of the Earth's interior, and (3) the radioactive decay of unstable isotopes are the sources of heat that are not major contributors to Earth's present-day internal heat.
What is heat?Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object.
(1) Extraterrestrial impacts, (2) gravitational contraction of the Earth's interior, and (3) the radioactive decay of unstable isotopes are the sources of heat that are not major contributors to Earth's present-day internal heat.
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Convert 3828 ml to L
Answer:
divide the volume value by 1000
So 3828/1000=3.828
Quick help!!! Name two methods that can be used to break down compounds into simpler substances.
Answer:
Photolysis and hydrolysis. These are two methods that can be used to break down a compound into simpler substances and smaller units.
Explanation:
The sentence explains the production and movement of energy in the sun and the flow of energy from the sun to earth. Draw each item to the correct location. Answers may be used more than once
(energy is released in the sun's core through_____ it then transferred by_____through the sun's radiative zone to the conductive zone,where it is transferred to the sun's surface by____ from the surface ,energy from the sun is transferred to earth by____
1. Nuclear fusion
2. Radiation
3. Conduction
Answer:
Nuclear fusion, Conduction, Conduction, Radiation.
The Sun produces energy deep inside its core by fusing hydrogen atoms together to form heavier ones through nuclear fusion. Conduction and convection are used to move heat from the core to the surface.
Radiation is the electromagnetic transmission of heat energy through space. The majority of the electromagnetic radiation that the sun emits and that reaches the Earth is invisible. Only a tiny fraction is visible light. Light consists of waves of various frequencies.
When two objects with different surface temperatures come in contact with one another, conduction happens. Up until they reach the same temperature, heat moves from the warmer to the cooler object. Heat moves through a substance by conduction when molecules collide.
Thus the correct order is Nuclear fusion, Conduction, Conduction, and Radiation.
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- La siguiente tabla, expone cómo desciende la temperatura (T) del aire con la altitud(h): Temperatura (ºC) 15 13,5 12 10,5 9 Altitud (m) 0 250 500 750 1000 Dado que la relación entre altura y temperatura viene dada por la siguiente fórmula: T=k*h+To Representa gráficamente los datos de la tabla y calcula To, que es la temperatura inicial (a una altitud de 0), y el valor de la constante k (pista k<0).
Answer:
k = -0.006.
T₀ = 15 °C
Explanation:
Hola.
En este caso, considerando la gráfica mostrada en el archivo adjunto, podemos evidenciar que los datos dados se comportan de manera lineal, por lo que basado en la ecuación, T=k*h+To, podemos calcular la pendiente que basicamente es igual a k, tomando dos puntos en la gráfica:
[tex]k=\frac{12-13.5}{750-500}=-0.0006[/tex]
Además, el valor de la temperatura inicial se puede extraer de la tabla, dado que esta es cuando la altura es 0 m, es decir 15 °C.
¡Saludos!
Static charges can be applied to neutral objects by friction, induction or conduction. What do all of these methods utilize to create this charge?
Protons
Electrons
Heat Energy
Magnetic domains
Answer:
Electrons
Explanation:
"Static charges" occur when the number of positive charge and negative charge are not equal. This can be applied to neutral objects by friction, induction and conduction with the help of "electrons."
In friction, the electrons are being transferred between the objects being rubbed together.
In conduction, the electrons are also being transferred from one object to another but not through rubbing; instead through direct contact.
In induction, the electrons are able to react immediately without the need for direct contact.
So, electrons are being utilized in these processes in order to create charge.
why position of hydrogen is controversial in periodic table
Answer:
the position of hydrogen is controversial in periodic table because hydrogen is the only element with out neutron. it belongs to 1 st group but it is not placed there .Feb 8, 2018
Explanation:
pls give brainliest and heart much appreciated
How did scientists conclude that most of an atom is empty space?.
Answer:
Rutherford concluded from his metal foil experiments that most of an atom is empty space with a tiny, dense, positively charged nucleus at the center that contains most of the mass of the atom. He also concluded that the electrons orbit the nucleus like the planets orbit the sun
Explanation:
What is the concentration of S2−
in equilibrium with MnS(s) (sp=4. 6×10−14)
and 0. 083
M Mn2+
?
The concentration of S2−in equilibrium with MnS(s) (sp=4. 6×10−14) and 0.083M Mn2+ is mathematically given as
[s^2-]=61.333*10^{-14}M
What is the concentration of S2−?Generally, the equation for the solubility constant is mathematically given as
Ksp=[Mn^2+][s^2-]
Therefore
4.6*10^{-14}=0.075*[s^2-]
[s^2-]=4500/0.075*10{-14}
[s^2-]=61.333*10^{-14}M
In conclusion, The concentration of S2−
[s^2-]=61.333*10^{-14}M
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Change 6 miles to feet
A piece of metal with a mass of 100. 0 grams absorbed 2500 joules of energy. During this time, the piece of metal had a temperature change of 74. 8*C. What is the metals specific heat?
The specific heat of the metal with a mass of 100g that absorbed 2500 joules of energy is 0.33J/g°C
How to calculate specific heat capacity?The specific heat capacity of a metal can be calculated by using the following expression:
Q = m × c × ∆T
Where;
Q = quantity of heat absorbed or releasedm = mass of metalc = specific heat capacityc = Q ÷ m∆T
c = 2500 ÷ (100 × 74.8)
c = 2500 ÷ 7480
c = 0.33J/g°C
Therefore, the specific heat of the metal with a mass of 100g that absorbed 2500 joules of energy is 0.33J/g°C.
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To describe a solid, you could say (check all correct answers): *
The particles of a solid are attracted to each other
The particles of a solid can move past one another
The particles of a solid vibrate but do not move past one another
A solid has mass and takes up space
Answer:
A solid has mass and takes up space
please name these chemicals.
Answer: Carbon,Hydrogen, Chlorine
Explanation:
C=Carbon
H=Hydrogen
Cl=Chlorine
Hope this helps :)
help!
The speed of light in vacuum is 300,000,000 m/s and the speed of light in water is 225,000,000 m/s. What is the refractive index?
A. 1.33
B. 1.5
C. 1
D. 2.33
Answer:
A 1.33
Explanation:
Refractive index = (speed of light in vacuum)/(speed of light in another medium)
Refractive index = (300000000)/(225000000)
Refractive index = 1.33
what is the valency & molecular formula of sulphate?
Explanation:
Let's consider sulphate radical, the chemical formula is given by SO42−. Here we can see there is a -2 charge on SO4, which means it has -2 valency. Now look at the option (a), phosphate can be written as PO43−. There is -3 charge on PO4, that means it has -3 valency.
Explanation:
molecular formula of sulphate ion is SO₄²⁻
and
the valency of sulphate ion is 2.
What is the volume of 19.87 mol of ammonium chloride (NH4CI) at STP?
Explanation:
[tex]19.87mol \times \frac{22.4lit}{1mol} = 445.088lit \: [/tex]
1. What are some of the structures inside a cell that help it to live and perform its role in an organism?
Answer:
Cells have many structures inside of them called organelles. These organelles are like the organs in a human and they help the cell stay alive. ... Mitochondria are the power house of the cell and provide the cell with energy. Both plant and animal cells have mitochondria.
Explanation:
If an element's half life is 3 days and there is initially 200 grams of the substance, how much of the substance is present after 1 half life period (3 days)?
Answer:
all u have to do is multiply
What would happen to the rate of the forward reaction if the concentration of nitrogen were decreased?.
Answer:
The reaction rate would decrease
Explanation:
What would happen to the rate of the forward reaction if the concentration of nitrogen were decreased? The reaction rate would decrease . What will happen to the rates of the forward and reverse reactions when a catalyst is added? Both forward and reverse rates increase.
The noble gases, in Group VIII of the Periodic Table, are unreactive and do not bond with other elements. State one use for helium.
Answer:
refigeration,coolant for nuclear reactants
Explanation:
used for cooling properties since it's boiling point being close to absolute zero.
1. What happens to the density of an object if the volume increases, but the mass stays the same?
Answer:
Its density becomes greater.
Explanation:
If the mass of the object stays the same but the volume of the object decreases then its density becomes greater. ... If the volume of the object stays the same but the mass of the object increases then its density becomes greater.
By definition of density, the density of an object if the volume increases, but the mass stays the same, will decrease.
You have to know that density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
In other words, the density of a material, be it liquid, chemical, or gaseous, is the ratio of its mass to its volume.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
And the higher the volume occupied by a given mass, the smaller the density.
Finally, the density of an object if the volume increases, but the mass stays the same, will decrease.
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brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResultsWhich of the following is an example of a physical property
Reaction with acids
Density
Reaction with water
Flammability
Answer:
The answer of this question is density
Part 1. A chemist reacted 15. 0 liters of F2 gas with NaCl in the laboratory to form Cl2 and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1. 50 atm.
F2 + 2NaCl → Cl2 + 2NaF
Part 2. Explain how you would determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP
Answer:Part 1. A chemist reacted 15. 0 liters of F2 gas with NaCl in the laboratory to form Cl2 and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1. 50 atm.
Explanation:
answer f2 280
Which of the following is a benefit of hydroelectric dams?
It allows for control of downstream seasonal Fooding
O
The reservoir can be a tourist attraction
o
There are no air pollutants are released during electricity
generation
OAll of the above
Answer:
I'm pretty sure it all of the above
sorry if I'm wrong
Explanation: