Jin listed some common thermal insulators and conductors in a chart. (attached below)
Which belongs in the area marked with an X?
A.) Iron
B.) Foam
C.) Wood
D.) Glass
Have a great rest of your day
#TheWizzer
Answers
Answer:
I would have to say the answer is A) iron. I say this because Iron is one of the most well know conductors and in the chart it as rubber and copper as the two conductors whole Air and Iron should be the x. Plus the rest don't make good conductors they are more insulators. So logicaly it wouldn't make sense to have any of the other answers.
Explanation:
Hope This Helps
Have A Great Day
~Zero~
According to the concept of conduction, iron belongs in the area marked with an X.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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Related Questions
i need help balancing the equation and number 4
Answers
Explanation:
I hope this helps answer your questions
what are two basic properties of the gas phase
Answers
Answer:
It has no definite shape or volume.
If y’all can answer this I’ll give you’ll some extra points
From observing the reaction, what would you predict to be delta H and delta S for the hydration of CaO? Warning. This is a tricky question. To help you determine the correct answer, the chemical reaction involving CaO and water is written below. Remember to us the rules you learned about assigning the sign of delta S
2CaO(s) + H2O(l) —> 2Ca(OH)2(s)
Answers
Based on the nature ofbthe reaction, entropy (ΔS) increases while enthalpy (ΔH) decreases.
What are entropy and enthalpy changes?Entropy changes, ΔS, refers to change in the degree of the disorderliness of a substance.
When substances become more random, entropy increases and vice versa.
For example, change of state from solid to liquid or gas results in increase in entropy.
Enthalpy changes, ΔH, refers to the changes in heat content of a substance, either a decrease or increase.
Enthalpy is negative when heat is lost and positive ehen heat is gained.
The enthalpy and entropy changes in the given reaction below is as follows:
2CaO(s) + H2O(l) —> 2Ca(OH)2(s)
Entropy, ΔS increases as the substance dissolves in water.
Enthalpy, ΔH, decreases as the substances gives off heat.
Therefore, in the given reaction entropy (ΔS) increases while enthalpy (ΔH) decreases.
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The gas in a balloon occupies 2.25 L at 298 K and 300 kPa. At
what temperature will the balloon expand to 3.50L and 2.17 atm?
Answers
If a gas in a balloon occupies 2.25 L at 298 K and 300 kPa, the temperature at which the balloon expand to 3.50L and 2.17 atm is 345.23K.
How to calculate temperature?The temperature of an ideal gas can be calculated using the following formula:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = final volumeT1 = initial temperatureT2 = final temperatureAccording to the information given in this question;
P1 = 300kpa = 2.96 atmP2 = 2.17 atmV1 = 2.25LV2 = 3.50LT1 = 298KT2 = ?2.96 × 2.25/298 = 2.17 × 3.5/T2
0.022T2 = 7.595
T2 = 7.595 ÷ 0.022
T2 = 345.23K
Therefore, if a gas in a balloon occupies 2.25 L at 298 K and 300 kPa. the temperature at which the balloon expand to 3.50L and 2.17 atm is 345.23K.
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What is the concentration in ppm of sodium fluoride in tap water that has been fluoridated by the addition of 32 mg of naf for every 20 kg of solution?.
Answers
ppm = mg/l = mg/kg
32 mg / 20 kg = 1.6 ppm
The concentration in ppm of sodium fluoride in tap water is 1.6 ppm.
What is ppm concentration?
ppm is an abbreviation for parts per million. It can also be expressed as milligrams per liter of a solution.It is a measurement which is equal to mass of a substance per unit volume .
One ppm is equivalent to the absolute fractional amount which is multiplied by a million . It is a best way to describe smaller concentrations in a mixture such as that of gases,liquids or solids . It is a ratio of two quantities which have the same unit. In its full form ppm is expressed as one in a million part.
Depending on the substance being measured 1 ppm is expressed in many different ways, out of which preferred ways are microliters per liter , milligrams per liter and micrograms per liter.
For the given problem, concentration in ppm is found out as, since ppm is miiligrams per liter the concentration is found out as follows:32 mg/20 kg (since kilograms and liters are equivalent) =1.6 ppm
Thus, the final concentration of sodium fluoride in tap water which is fluorinated is 1.6 ppm.
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At the wavelengths included in Study 1, as the
wavelength of light increases, the reflectance of
Cyanide:
A.
increases only.
B.
decreases only.
C.
increases, then decreases.
D.
decreases, then increases.
Answers
Based on the research in Study 1, as the wavelength of light increases, the reflectance of Cyanide: C. increases, then decreases.
What is wavelength?Wavelength is simply defined as the distance (in meters) between two (2) successive crests or troughs of a wave. Thus, wavelength refers to the horizontal distance between two adjacent crests or troughs of a wave.
Generally, there is a linear relationship between the wavelength of light and reflectance. Thus, as the wavelength of light increases, the reflectance of Cyanide in Study 1 increases, before it then decreases.
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Cassiterite is an ore of a metal tin. What is an ore?
Answers
Answer:
Cassiterite is an ore of Sn.It is also called tinstone and has molecular formula of SnO
2 . It is heavy, metallic, hard tin dioxide that is the major ore of tin. It is colourless when pure, but brown or black when iron impurities are present.
complete and balance the following equation b. Br2 + Nacl
Answers
Which of the following is a structure of a cow?
O Possessing sharp teeth.
O Having hooved feet.
O Coming when called.
O None of the above.
Answers
Answer:
None of the above.
Explanation:
None of thesse things are part of the structure of a cow, cows have dished forhead 4 stomachs and angular body not sharp teeth comin when called or hooved feet.
cacoH2+2NH4Cl-cacl2+2H2O+HN3
A. how many grame of cacl2 will be formed from the of
A20gm of cacoH2
B 40gm of NH4Cl
Answers
Answer:
a 63.428gm
b 41.5 gm
Explanation:
a
70 gm CaCOH2=111gm of CaCl2
40 gm =(111*40)/70
=63.428gm
b
107 gm of NH4Cl =111 gm of CaCl2
40 gm gives =(111*40)/107
=41.5 gm
The major product of the given reaction has the molecular formula c10h16o3. Draw its structure in the most stable tautomeric form.
Answers
Tautomers are isomers composed of the same atoms but with different electronic and molecular structures. The most stable tautomeric form is attached.
What is tautomery?
Tautomery is a special case of isomery produced by the change in the position of one or more atoms in the molecule. This change in position modifies the molecular electronic distribution, and hence, the molecular structure.
In solution, isomeres called tautomers are in equilibrium, and the constant interconversion is called tautomerization. Both molecules have the same type and quantity of atoms.
In the proposed example, the product has the molecular formula C₁₀H₁₆O₃. Isomeric molecules must have 6C, 16H, and 3O. However, the distribution of these atoms varies, leading to a change in the product molecule structure.
In the attached files you will find an example. You should check if this is the same example as yours.
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_____is the force created when an object is physically pushed or pulled. *
1 point
A. applied force
B. friction
C. gravity
D. magnetism
Answers
Answer:
applied force .....I'm pretty sure
Answer:
A. Applied forces aka Contact forces
Explanation:
Thos force is created when you apply forces to an object as in a push/pull or other physical ways.
I hope it helps! Have a great day!
Anygays-
Which two organisms are most likely to be competitors?
chipmunk, cow
snake, hawk
snake, badger
chipmunk, badger
Answers
Question 1 (8 points)
Name the following simple binary compounds.
1. NaBr =
2. KCl =
3. Mgo =
4. CaF2=
5. BaS =
6. Li20 =
7. NaF =
8. CS3N =
Answers
Answer:
Below
Explanation:
1. Sodium Bromide
2. Potassium Chloride
3. Magnesium Oxide
4. Calcium Fluoride
5. Barium Sulfide
6. Lithium Oxide
7. Sodium Fluoride
8. Cesium Nitride
Increasing the amplitude means you are increasing what of a wave?
Answers
Pumice is a volcanic rock that contains many trapped air bubbles. A 225- gram sample is occupied 236.6ml.
a. What is the density of pumice (answer is 0.951g/ml)
Answers
density of the pumice.
solution:density= mass/ volume (d= m/v)
= 225/236.6
= 0.951g/ml
so, the density of pumice is 0.951g/ml.
[tex]{\boxed{{ formula :}}} [/tex]
[tex] →\bold{Density = \frac{mass}{volume} }[/tex]
[tex]{\boxed{{ Given :}}} [/tex]
[tex]→\bold{Mass = 225 g }[/tex]
[tex]→\bold{ Volume = 236.6 ml}[/tex]
[tex]{\boxed{{ Solution :}}} [/tex]
[tex]→\bold{Density = \frac{mass}{volume} }[/tex]
[tex]→\bold{ Density = \cancel{ \frac{225 g}{236.6 ml}} = 0.951 g/ml}[/tex]
The density of pumice is 0.951 g/ ml .
Why is most space exploration
accomplished with spacecraft that do not have
crews on board?
Answers
Answer:
why is most space exploration accomplished with spacecraft that do not have crews on board? humans face many challenges in space. what is one advantage of using an orbiter to study objects in space? can be used for long periods of time.
Which of the following formulas should be classified as an acid?
O Na₂SO4
O NaHCO3
O NaOH
O H₂SO4
Answers
Answer:
D) H₂SO4 is an acid
Explanation:
Please mark branliest
H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid. Therefore, the correct option is option D.
What is an acid?Any substance that tastes acidic when dissolved in water, alters the colour of some indicators, reacts with the some metals to release hydrogen, reacts using bases to produce salts, and stimulates some chemical reactions is considered to be an acid. The inorganic chemicals referred to as being mineral acids sulfuric, nitrous, hydrochloric, or phosphoric acids are examples of acids.
The phenolic, sulfonic, and carboxylic acid groups of organic molecules. These chemicals contain one or maybe more hydrogen atoms, which are discharged into highly charged hydrogen ions when they are in solution. H[tex]_2[/tex]SO[tex]_4[/tex] is the chemical formula that should be classified as an acid.
Therefore, the correct option is option D.
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write the name of high quatity of coal
Answers
Answer:
Write the name of high quatity of coal
Explanation:
how many moles of o2 would be required to produce 4 mol h2o?
Answers
Hii there !
The reaction accompanying production of water in this case would be -
[tex]\green{ \underline { \boxed{ \sf{2H_2+O_2\longrightarrow 2H_2O}}}} [/tex]
Thus ,by observing the reaction, we can conclude that 2 mole of Hydrogen [tex](H_2 )[/tex]react with 1 mole of oxygen[tex](O_2)[/tex]to produce 2 mole of water [tex](H_2O)[/tex]
Now,
To produce 1 moles of water.
Moles of Oxygen[tex](O_2)[/tex] required [tex] = \frac{1}{2}[/tex] moles
Similarly,
To produce 4 moles of water.
[tex]\implies[/tex] Moles of Oxygen[tex](O_2)[/tex] required = [tex]\frac{1}{2}\times 4[/tex] moles
[tex]\implies[/tex] 2 moles
Hope it helps.
Imagine that you are a leaf on a plant, and you realize that you are running low on supplies to do your job. You decide to text the roots to set up a delivery. Write a text message conversation between the leaf and the roots that discusses and arranges this delivery.
Be sure to answer these questions in your conversation:
• Which supplies is the leaf running out of? • What are the supplies needed to do? • How will the roots get the supplies from outside the plant? • How will the supplies get from the roots to the leaf?
Answers
The leaves of plants primarily serve to photosynthesize and require water conducted by the root to do so.
Water conduction by the rootAs a leaf of a plant running low on supplies that the root is responsible for, what I will be needing is water.
Thus, I will have to send a text message to the root to supply me with water. The root will respond by asking its foot soldiers (the root hairs) to conduct water into the root.
Once water gets into the root, it enters special cells that are responsible for conducting water inside plants - the xylems. The root sends the water through the xylem and water travels from there to me - the leaf.
Once the water gets to me, I will use it in combination with inorganic carbon (carbon dioxide) to synthesize carbohydrates.
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Consider these equations:
2S (s) + 3O2 (g)→2SO3 (g), ΔH = −792 kJ
2S (s) + 2O2 (g)→2SO2 (g), ΔH = −594 kJ
2SO2 (g) + O2 (g)→2SO3 (g), ΔH =?
What is the missing ΔH?
a. −294 kJ
b. −198 kJ
c. +198 kJ
d. +294 kJ
Answers
Answer: (B) −198 kJ.
What is due to acids formed when atmospheric and volcanic gases mix with water. question 2 options: chemical weathering mechanical weathering root-pry pedalfer
Answers
Chemical weathering formed is due to acids formation when atmospheric and volcanic gases mix with water.
What is chemical weathering?Chemical weathering is a type of weathering that involved weakening and disintegration of rock by chemical reactions like acid reactions and so on. These reactions include oxidation, hydrolysis, and carbonation. These processes lead to formatiom or destruction of minerals, thus changing the nature of the rock's mineral composition.
Therefore, Chemical weathering is due to acids formed when atmospheric and volcanic gases mix with water.
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Which lewis dot diagram shows an atom that needs 2 more electrons in its outermost shell?.
Answers
Answer:
Fluorine needs two more electrons on the outermost shell.
Explanation:
I'm in K12 too.
HELPPPPP
A sample of gas contains 6 mol in a 22 L flask at 238 K. What is the pressure of the gas in atmospheres?
Answers
The pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
Ideal Gas LawThe Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "pressure P times volume V is equal to moles times temperature and the universal gas constant. It is expressed;
PV = nRT
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).
Given the data in the question;
Amount of gas n = 6molVolume V = 22LTemperature T = 238KPressure P = ?We substitute our values into the expression above to determine the pressure of the gas in atmospheres.
PV = nRT
P = nRT / V
P = ( 6mol × 0.08206Latm/molK × 238K ) / 22L
P = 117.18168Latm / 22L
P = 5.33atm
Therefore, the pressure of the sample of gas with the given mol, volume and temperature is 5.33atm.
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explain any four effects caused due to exercise use chemical of chemical feritilizer on environment
Answers
Excessive use of chemical fertilizers has led to several issues such as serious soil degradation, nitrogen leaching, soil compaction, reduction in soil organic matter, and loss of soil carbon.
Hope it helps :)
3.0 Liters of gas at a pressure of 0.90 atm is compressed to 2.0 atm.
What is the new volume?
Answers
Answer:
5.5 L
Explanation:
Distinguish between single and double replacement reactions and give an example of
each.
Answers
Answer:
i think this is right!
Explanation:
An example of a single replacement reaction occurs when potassium (K) reacts with water (H2O). A colorless solid compound named potassium hydroxide (KOH) forms, and hydrogen gas (H2) is set free. The equation for the reaction is: 2K + 2H2O → 2KOH + H.
An example of a double replacement reaction is the reaction between silver nitrate and sodium chloride in water. Both silver nitrate and sodium chloride are ionic compounds. Both reactants dissolve into their ions in aqueous solution.
HELP PLS WILL GIVE BRAINLIEST AND THANKS
In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation.
2Al + 3Cl2 ==> 2AlCl3
a)Identify the limiting reagent for the reaction.
b)Calculate the number of moles or products formed
Answers
Answer:
you have school on Sunday?
Chromium (lII) sulphate reacts with potassium carbonate to form chromium (III) carbonate and potassium
sulphate.
Skeleton equation:
Answers
Answer:
Cr2(SO4)3+K2CO3---------------->Cr2(CO3)3+K2SO4
BALANCING
Cr2(SO4)3+3K2CO3------------------------->Cr2(CO3)+3K2SO4
Explanation: