Answers
Answer: plastic conduces heat
Explanation:Plastics are excellent insulators, meaning they can efficiently trap heat — a quality that can be an advantage in something like a coffee cup sleeve. ... The new polymers, which are lightweight and flexible, can conduct 10 times as much heat as most commercially used polymers
Related Questions
The radioisotope radon-222 has a half-life of 3.8 days. How much of a 73.9-g sample of radon- (3 222 would be left after approximately 23 days?
Answers
Answer:
1.115 g
Explanation:
Applying,
R = R'[tex]2^{n/t}[/tex]................... Equation 1
Where R = original sample of radon-222, R' = sample of radon-222 left after decay, n = Total time, t = half-life.
make R' the subject of the equation
R' = R/([tex]2^{n/t}[/tex])............... Equation 2
From the question,
Given: R = 73.9 g, n = 23 days, t = 3.8 days.
Substitute these values into equation 2
R' = 73.9/([tex]2^{23/3.8}[/tex])
R' = 73.9/[tex]2^{6.05}[/tex]
R' = 1.115 g
Can anyone solve this for me please.
I appreciate anyone that is helping me with these questions
Answers
#2 is d
#3 is b
#4 is a
#5 isC
#6 is C
#7 is b
Now im not totally sure but these are my best answers for u. Hope ya ace ✨ stay safee
A 25 Ω resistor has a voltage drop of 12 V across it. Calculate the current flowing through the resistor
Answers
Answer:
0.48
Explanation:
[tex]i = \frac{v}{r} [/tex]
because we are looking for I which is current we say
I = 12÷25 which is 0.48.
The current flowing through the resistor is 0.48 A.
What is resistor?The resistor is a length of wire which resists the flow of current.
According to Ohm's law, the potential difference is proportional to the current flowing in the circuit.
V =I R where R is the resistance.
Given is the resistance of resistor R = 25Ω and the voltage drop V =12 Volt, then the current through the resistor will be
I =V/R
I = 12/25
I =0.48 A
Thus, the current in resistor is 0.48 Amperes.
Learn more about resistor.
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What is the pH of a solution?
O A. A measure of the strength of the acid
B. A measure of the buffering ability of the solution
O c. A measure of the hydrogen gas concentration
O D. A measure of the acidity of the solution
Answers
Answer:
D. A measure of the acidity of the solution
Explanation:
pH is a measure of how acidic or basic a solution is, and is measured on a scale from 0-14, where 7 is neutral, anything less than 7 is acidic, and anything more than 7 is basic.
Which defines the word planet?
A. A large body that revolves around the Moon.
B. A large body suitable for life.
C. A large body that contains water and land.
D. A large body that revolves around the Sun.
Answers
Answer:
I think it's D cause one of the requirements for a planet is that it has to revolve around a star
The metric system is also known as the
Answers
Answer:
THE answer is all of above
Explanation:
Which of the following correctly ranks the following bonds in order from most to least polar?
C-H, N-H, O-H, F-H
a)
O-H > F-H > N-H > C-H
b)
F-H > N-H > O-H > C-H
c)
C-H > N-H > O-H > F-H
d)
F-H > O-H > N-H > C-H
Answers
Answer:
O-H F-H N-Hy
Explanation:
C-H N-H O-H F-H
what rule/principle states that electrons fill orbitals from lowest energy to highest enegery?
Answers
Answer:
The Aufbau Principle
Explanation:
In the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy level before occupying higher-energy levels.
Answer:
Aufbau principle
Explanation:
edge 2021
Por qué razón se fomenta la inmigración Europea?
Answers
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
Hola aquí va la respuesta!
Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.
Which statement describes one way that nuclear fission differs from nuclear fusion?
Answers
Answer:
Nuclear fission is used to produce electrical power.
Explanation:
Both types of nuclear reaction require high temperatures
Answer:
D
Explanation:
If the pH = 6.5, what is the [H+]? *
3.16 x 10-7
3.16 x 10-6
O
3.16 x 10-5
Answers
Answer:
Key Concepts
The hydrogen ion concentration in a solution, [H+], in mol L-1, can be calculated if the pH of the solution is known.
pH is defined as the negative logarithm (to base 10) of the hydrogen ion concentration in mol L-1 pH = -log10[H+] ...
[H+] in mol L-1 can be calculated using the equation (formula): [H+] = 10-pH
More items...
Explanation:
Answer:
[tex]pH = - log[H {}^{ + } ] \\ 6.5 = - log[H {}^{ + } ] \\ [H {}^{ + } ] = {10}^{ - 6.5} \\ [H {}^{ + } ] = 3.16 \times {10}^{ - 7} \: mol {dm}^{ - 3} [/tex]
A carbon atom that is surrounded by four hydrogen atoms has a _____ molecular geometry. This geometry results from the arrangement of the _____ hybrid orbitals around the carbon atom. They are formed when the s-orbital and ______ -orbitals mix, or hybridize.
Answers
Answer:
Tetrahedral, sp3, p
Explanation:
C has 4 bonds and hence its tetrahedral shape with 109.5 degrees. since there are 4 bonds, it is sp3
Answer:
A carbon atom that is surrounded by four hydrogen atoms has a
✔ tetrahedral
molecular geometry.
This geometry results from the arrangement of the
✔ four sp3
hybrid orbitals around the carbon atom.
They are formed when the s-orbital and
✔ three p
-orbitals mix, or hybridize.
Explanation:
calculate the molecular weight of CaCO3.
Answers
Answer:
Explanation:
CaCO3 = 1*Ca + 1*C + 3*O
=1*40 + 1*12 + 3*16
=40 + 12 + 48
=100 amu
Which is the best reason to carry out scientific research on climate change?
A. To help people prepare for the future
O B. To create jobs for scientists
C. To elect better-informed politicians
D. To win political debates
Answers
Which is the best reason to carry out scientific research on climate change?
A. To help people prepare for the future
B.To create jobs for scientists ☑️C. To elect better-informed politicians
D. To win political debates
Answer:
to create jobs for scientists
Which of the following could possibly be true about a strong acid? (Check all that apply:).
It will completely dissociate (break apart) when dissolved in water.
It could have a pH of 6
It could have a pH of 13
Only a few of the acid molecules will dissociate (break apart).
It could have a pH of 2.
It could have a pH of 9
Answers
Answer:
it could have a pH of 2 it will completely dissociate when dissolved in water4. What is a renewable resource? List some examples.
Answers
Answer:
Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals. This includes wood, sewage, and ethanol (which comes from corn or other plants).
five examples of renewable resources
Solar energy.
Wind energy.
Geothermal energy.
Hydropower.
Bioenergy.
I hope it help you
Answer:
The most popular renewable energy sources
currently are
Solar energy
Wind energy
Hydro energy
Tidal energy
Geothermal energy
Biomass energy
Consider the following intermediate chemical equations.
CH2(g) →C(s) + 2H2(g)
CC1.(g) → C(s) +2012(g)
H2(g) +C12(g) → 2HCl(9)
ΔH, = 74.6 kJ
ΔH2 = 95.7 kJ
ΔΗ =
ΔHg =-92.3 kJ
What is the enthalpy of the overall chemical reaction CH (g) +4012(g) → CCl4(h)+ 4HCl(g)?
Answers
Answer: The enthalpy of the overall chemical equation is -205.7 kJ
Explanation:
Hess's law is defined as the law which states that the total amount of heat absorbed or released for a given chemical reaction will remain the same whether the process occurs in one step or several steps.
In this law, a chemical equation is treated as an ordinary algebraic expression that can be added or subtracted to yield the required overall equation.
The enthalpy change or heat of the overall reaction is the summation of the enthalpies or heats of the intermediate reactions involved in the process.
The given overall chemical equation follows:
[tex]CH_4(g)+4Cl_2(g)\rightarrow CCl_4(g)+4HCl(g);\Delta H^o_{rxn}[/tex]
The intermediate equations for the above reaction are:
(1) [tex]CH_4(g)\rightarrow C(s)+2H_2(g);\Delta H_1=74.6 kJ[/tex]
(2) [tex]CCl_4(g)\rightarrow C(s)+2Cl_2(g);\Delta H_2=95.7kJ[/tex]
(3) [tex]H_2(g)+Cl_2(g)\rightarrow 2HCl(g);\Delta H_3=-92.3kJ[/tex]
According to Hess law, the enthalpy of the reaction becomes:
[tex]\Delta H^o_{rxn}=[1\times (\Delta H_1)] + [1\times (-\Delta H_2)] + [2\times (\Delta H_3)][/tex]
Putting values in above expression, we get:
[tex]\Delta H^o_{rxn}=[1\times (74.6)] + [1\times (-95.7)] + [2\times (-92.3)]\\\\\Delta H^o_{rxn}=-205.7kJ[/tex]
Hence, the enthalpy of the overall chemical equation is -205.7 kJ
How are liquid water, ice, water different from each other?
Answers
Answer: In liquid water, water molecules are moving faster. They are still close together, but they are no longer stuck in a rigid pattern as they are in ice. Water molecules in liquid water are constantly sliding past and bumping into each other; they keep moving from one place to another.
Answer:
they are different forms
Explanation:
ice is solid
and water is liquid
they also have different densities
How many significant figures are in this number?
3x10^6
If it's right 30 POINTS !!!!!!!
Answers
Una reacción química es un proceso en el cual se produce un cambio químico, es decir, se consume una o más sustancias a medida que se forman una o más sustancias nuevas.
Answers
Answer:
Para ser mas exactos una reaccion quimica es donde los reactivos se transforman en productos.
Explanation:
Durante las reacciones quimicas, ocurren ciertas transformaciones que hace que se tome o se libere energia del medio, generando que los reactivos de la reaccion, es decir los compuestos iniciales, en un determinado espacio y tiempo bajo ciertas condiciones de presion y temperatura exactas se transformen en productos.
Para la quimica, la misma cantidad de materia que se encuentra en los reactivos se mantendra en los productos, es por eso que cada reaccion quimica debe respetar las reglas de la estequiometria y estar balanceadas a la perfeccion.
Group 1 period 3 on periodic table
Answers
Answer:
unable to compute
Explanation:
Which two laws were discovered by Antoine Lavoisier and Joseph Proust?
Answers
Briefly explain why adding insulation to an attic helps reduce heating costs.
Answers
Answer:
Insulation reduces the exchange of heat through a surface such as a wall, attic, duct or roof. In a well-insulated home, less warm air escapes from the house during the winter, and less cool air escapes during the summer, reducing the amount of energy needed for heating and cooling
What can be found in the Asteroid Belt?
Answers
Answer:
astrioids can be found at the astrioid belt
Answer:
Composition. Most of the asteroids in the Main Belt are made of rock and stone, but a small portion of them contain iron and nickel metals. The remaining asteroids are made up of a mix of these, along with carbon-rich materials. Some of the more distant asteroids tend to contain more ices
WHAT HAPPENS WHEN ELECTRIC CURRENT PASSES THROUGH ACIDIFIED WATER.
Answers
Answer:
When an electric current is passed through acidified water, it decomposes to give hydrogen and oxygen gas. The hydrogen gas is obtained at the cathode and the oxygen gas is obtained at the anode
Chemistry 1 question please help!! 10 points
Answers
Answer:
3
Explanation:
its the 3 one it is
How many moles of sodium are in its 85 g?
Answers
Answer:
22.98977
Explanation:
don't worry about that
Explanation:
85 g Na × (1 mol Na/22.9898 g Na)
= 3.7 mol Na
Sodium-22 has a 2.605-year half-life. If you begin with 1.570 grams of Na-22, how many grams are left after 1.00 year?
Type the correct answer in the box. Express your answer to the correct number of significant figures.
Answers
Answer:
1.20 grams
Explanation:
Correct on edmentum/plato
Answer: 1.20 grams
Explanation:
Which of the following best describes an electron transition?
A. An electron gains or loses energy and moves between continuous
energy levels.
B. An electron gains or loses charge and changes into a proton or a
neutron.
C. An electron gains or loses energy and moves between quantized
energy levels.
D. An atom gains or loses an electron and becomes an ion.
Answers
Answer:
A. An electron gains or loses energy and moves between continuous
energy levels.
What is Geothermal Energy?
Answers
Answer:
Geothermal energy is basically the thermal energy generated and stored in the Earth. It is the energy that determines the temperature of matter.
Explanation:
I hope this helped :)
Answer:
Geothermal energy is heat that's inside of the ground. It is a renewable energy source because heat is constantly being produced inside of the earth.
Explanation: Hope this helps! :)
