Answer:
A is it
Explanation:
how many moles are present in 132.7 grams of Cu
Supplies the chemical energy for cell growth
Anabolic
Catabolic
Anabolism requires energy to grow and build.
Is foam a conductor or an insulator? Explain.
Answer:
Polystyrene and plastic foam are both used as insulators as they have small air bubbles trapped inside them. This makes them very good insulators because heat energy can't flow through them
Explanation:
Calculate the heat energy required to melt 4kg of ice when the specific latent heat of fusion of water is 334,000 J/kg.
1336 kJ
2336 kJ
3336 kJ
HELP ASAP
[tex]\bold{\huge{\blue{\underline{ Solution}}}}[/tex]
We have given in the question that,
4kg of ice melts at the specific latent heat of fusion of water is 334,000 J/kg .We know that,
Amount of heat required = Mass * specific heat * change in temperature
[ Specific Latent heat of fusion is the amount of heat required to change one mole of substance from solid to liquid phase without changing in temperature .]
But, For complete melting of substance without change in temperature
Amount of heat required = Mass * Specific latent heat of fusion
Subsitute the required values,
[tex]\sf{\red{ Q = MCl}}[/tex]
Where,
Q = Amount of heat required M = Mass of the substance Cl = Specific latent heatNow,
[tex]\sf{ Q = 4 × 334000}[/tex]
[tex]\sf{ Q = 1336000 J }[/tex]
[tex]\sf{ Q = 1336 KJ }[/tex]
Hence, The amount of heat required to melt 4kg ice is 1336KJ
[tex]\bold{\red{ Option\: A \:is\: correct }}[/tex]
Taking into account the definition of calorimetry and latent heat, the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 [tex]\frac{J}{kg}[/tex] is 1,336 kJ.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Latent heatLatent heat is defined as the energy required by a quantity of substance to change state.
When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.
The heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to
Q = m×L
where L is called the latent heat of the substance and depends on the type of phase change.
Heat energy required to melt iceIn this case, you know:
m= 4 kgL= specific latent heat of fusion of water= 334,000 [tex]\frac{J}{kg}[/tex]Replacing in the expression for latent heat:
Q = 4 kg× 334,000 [tex]\frac{J}{kg}[/tex]
Solving:
Q= 1,336,000 J= 1,336 kJ (being 1,000 J= 1 kJ)
Finally, the correct answer is the first option: the heat energy required to melt 4 kg of ice when the specific latent heat of fusion of water is 334,000 [tex]\frac{J}{kg}[/tex] is 1,336 kJ.
Learn more about calorimetry:
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would you rather be hot or cold
Answer:
cold
Explanation:
because being cold helps to refresh my body personally
Answer:
hot
Explanation:
because I like to stay warm and take warm showers
gosh i rly need help in the previous questions I asked and no one answered I wish I was smart to answer them alone why am I d.umb
Answer:
gonna check them rn :) youre not d u mb dont worry (:
At 19 °C, the vapor pressure of pure ethanol is 40.0 mmHg.
What is the pressure in atm?
atm
Answer:
0.05263158 atm
Explanation: mmHg to Atmosphere Conversion Example. Task: Convert 975 mmHg to atmospheres (show work) Formula: mmHg ÷ 760 = atm Calculations: 975 mmHg ÷ 760 = 1.28289474 atm Result: 975 mmHg is equal to 1.28289474 atm. This is an example for how i got the answer.
List all types of bonding present in the molecule SO3.
I. ionic bond
II. polar covalent bond
III. nonpolar covalent bond
Sulfur trioxide (triangular planar) formed by double covalent bonds, is a compound that presents polar bonds although the dipole moments associated with each bond are canceled by symmetry, resulting in apolar molecules.
What is SO3?It is a nonpolar molecule that contains one sulfur atom bonded to three oxygen atoms.
Characteristics of the types of bonding present in the molecule SO3It is a molecule formed by covalent double bonds between S and O atoms, whose molecular formula is SO3.In SO3 there are three bonds between S and O, the first bond is formed by sharing two pairs of electrons (double bond), with this double bond the S and O complete the octet.S has two other pairs of electrons in the valence shell and gives each pair to two O atoms, thus completing its octet, forming two other bonds called dative covalent bonds.Therefore, we can conclude that SO3 is a nonpolar molecule due to its geometry (trigonal planar) and the absence of a lone pair of electrons.
Learn more about types of bonding present in the molecule SO3 here: https://brainly.com/question/17356017
Iron is produced from its ore, iron oxide, by using a displacement reaction.
This is done in a blast furnace.
Which element is used to displace iron?
Answer:
its carbon
Explanation:
iron oxide + carbon = iron + carbon dioxide
as coke(mainly carbon) is a raw material gone into a blast furnace displaces iron.
How is an electromagnet similar to and different from a regular magnet?
Answer:
that the electromagnet can have a magnetic field when an electric current flows through it and disappears when the flow of the current stops, while permanent magnets are made up of magnetic material that can be easily magnetized and can create
Explanation:
Which two of the following substances dissolves to a significant extent in water?
1. N2
2. C6H6
3. Na2SO4
4. NaCl
Answer: NaCl and Na2SO4
Explanation: sorry if its wrong
The molar mass of AI2CI6 is the mass of one mole of the compound. It is also which of the following?
A. The mass of 1 mole of AI and 1 mole of CI
B. The mass of 2 moles of AI and 6 moles CI
C. The mass of ½ mole of AI and ½ mole of CI
D. The mass of ¼ mole of AI and ¾ mole of CI
Answer:
Is their a picture with the question?
Explanation:
SOMEONE HELP ME PLEASE
A canoeist is paddling his boat, which is equipped with the necessary safety environment. Identify at least three synthetic fibres or plastics used in this case.
pls help me
Answer:
Nylon, Cabon Fibre, High-Density Polythene.
If You Like My Answer Mark It As Brainliest.
The three synthetic fibers or plastics used by the canoeist are:
Carbon FibreHigh-Density Polythene.NylonWhat are synthetic fibers?Synthetic fibers are defined as man-made textile fibers that are generated from chemical substances. Some of these man-made fibers are also derived from natural substances such as cellulose or protein.
Based on the given question, the three synthetic fibers or plastics used by the canoeist are:
Carbon FibreHigh-Density Polythene.NylonLearn more on synthetic fibers here; https://brainly.com/question/25834689
A 36-gram sample of water has an initial temperature of 22°c. After the sample absorbs 1200 joules of heat energy, the final temperature of the sample is.
Answer:
≈29.94 [°C].
Explanation:
all the details are in the attachment, the answer is underlined with orange colour.
The four nitrogen bases are thymine, cytosine, guanine, and adenine. True or false
Answer:
True
Explanation:
What is the percentage of oxygen in carbon dioxide.
Which statement is correct? 22 points
Nearly all mutations are good.
Nearly all mutations are harmful.
Most mutations produce no effect.
Mass and energy are cycled around us all the time. What do you think your role is in the cycling of energy? Where do you get energy from and where does the energy go?
Answer: Our energy supply comes mainly from fossil fuels, with nuclear power and renewable sources rounding out the mix. These sources originate mostly in our local star, the Sun. Electricity falls into its own category because it's an energy carrier and not a primary source.
Explanation:
Answer:
Our primary energy source is fossil fuels, with nuclear power and renewable energy sources rounding out the mix. These sources are mostly derived from our nearest star, the Sun. Electricity is classified separately because it is an energy carrier rather than a primary source.
Explanation:
I had that question before it was hard good luck :D
To balance this equation, how many NaBr are need
NaBr + Ca(OH)2 Cabr2 + NaOH
Describe in your own words a situation where chemical energy is transformed to potential energy.
ANSWER NOW 80 POINTS
Answer:
An important example of chemical potential energy is the energy stored in the food that you eat. Inside your body, this food is distributed around your body and is reacted in your cells to release the energy stored in the chemical bonds.
Explanation:
Directions : Answer the following problems and show the solution
1.Calculate the speed for car that went a distance of 125 kilometers in 2-hour time
Equation (Formula) :
Plug numbers into the Equation (Substitute) :
Solution:
Final answer with unit of measure :
2.A baseball is thrown a distance of 60 meters . What is its speed if ot takes 0.5 seconds to cover the distance ?
Equation (Formula):
Plug numbers into the Equation (Substitute):
Solution:
Fina Answer with unit measure:
Correct Answer Brainliest
Wrong Answer Report
Answer:
Alb sick see dress fbcd soft comfy also could for church food collection conservatismHow many moles of O2 are required to react with 2.4 mol of H2 ?
Please explain your answer, I’m really trying to understand the concept!!!
Answer:
1.2 moles
Explanation:
this is the balanced equation for the reaction of oxygen (O2) and hydrogen (H2), usually we don't write the 1 in front of O2
2H₂ + 10₂ → 2H₂O
the molar ratio of hydrogen to oxygen is 2 : 1
we are trying to react with 2.4 mol of H2 so the moles of O2 is half the number of moles of H2 = 2.4 ÷ 2 = 1.2 mol
another way to think of it:
2H₂ + 10₂
2 : 1
2.4 mol : x mol
to get from 2 to 2.4 multiply by 1.2, so do the same to the other side
1 × 1.2 = 1.2 mol
Given the following balanced equation:
4NH3 + 6NO --> 5N2 + 6H2O
The molar ratio of:
Ammonia to nitrogen?
Ammonia to water?
Nitric Oxide to ammonia?
Nitric Oxide to water?
Water to ammonia?
What do you already know about fossils? Describe as much as you can in the space below.
Answer:
Fossils are remains or traces from ancient life's that is most likely buried in rocks anywhere in the world. Fossils are basically bones, teeth, shells, nests, leaf impressions, and footprints. That is technically explaining what our planet was like long ago. Some dinosaur fossils have been found. Paleontologists find them almost everywhere. If you don't know what Paleontologists are, they're basically people who study fossils. A lot of fossils are found in sedimentary rocks. Sedimentary is a rock that has been formed from things like sand, mud, and many other kinds of rocks.
Hope this helps.
42. In order to turn on the light, a piece of wire
needs to be connected from
43. Which of the following energy conversions is
best illustrated by the diagram above?
Balance the equation:THANK U IF U FIND IT!!
Answer:
[tex] ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 [/tex]
Explanation:
Here a reaction is given to us and we need to balance the equation . The given reaction is ,
[tex] ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 [/tex]
So here , we can make a table as ,
[tex]\begin{array}{c|c} \\ LHS & RHS \\\\ Zn = 1 & Zn = 1 \\\\ SO_4 = 1 & SO_4 =1\\\\ Li = 2 & Li= 2 \\\\ CO_3 = 1 & CO_3 = 1 \end{array}[/tex]
We can see that the number of elements and ions is same on both LHS and RHS . Hence the reaction is already balanced .
Therefore the final reaction would be same as before that is ,
[tex] ZnSO_4 + Li_2CO_3 \longrightarrow ZnCO_3 + Li_2SO_4 [/tex]
I hope this helps .
i need help yall ill mark brainliest :)
Answer:
How does non-human life in an urban ecosystem differ from that in an undeveloped forest ecosystem?
Explanation:
In forest eco system the people are uncivilized and not so much educated. And in urban eco system people are intelligent as well as educated this is the main reason. In an urban ecosystem, the only non-human life that live there are the ones that are able to survive under the conditions. However, in undeveloped forest ecosystems, there’s barely any pollution. Therefore, a bigger variety of non-human life is able to live here.
Mark brainliest if you can please :)
Liquids with high equilibrium vapor pressure have low _______?
difference between---
soap and detergent
Answer:
"Soaps are made from natural ingredients, such as plant oils (coconut, vegetable, palm, pine) or acids derived from animal fat. Detergents, on the other hand, are synthetic, man-made derivatives. While soap is limited in its applications, detergents can be formulated to include other ingredients for all sorts of cleaning purposes. Perhaps the most common and versatile of these ingredients are surfactants … surface active agents.
The main difference between soap and detergent is the ingredients. Soaps are made with biodegradable ingredients such as oils, lye and fats. ... Both clean clothes well, but detergents are more effective on stains and with brightening clothes. However, soap is kinder on the environment and skin. "
Hope this helps
Excerpt from textbook