Answer:
electromagnetic waves
Explanation:
Radiation is the transfer of heat energy through space. Most of them are sent through electromagnetic waves.
solve this questions please
Ethane I think because it is colourless ,odorless and flammable gas
Answer:
i think ethane
Explanation:
because it is flameless gas
Do you have evidence from the lab that your calorimeter was not a perfect insulator? Assuming that heat was lost from the calorimeter, describe specifically how that would impact the data you recorded and then chase that change through the calculations to show how the error would impact the calculated enthalpy change for a particular reaction.
In the past, we have done this lab with roughly 50 mL each of each reactant solution, instead of 25 mL. Yet the Δ T determined experimentally were roughly the same. Explain why that is.
Each student will have slightly different volumes of reactants for each reaction. Yet the results obtained for ΔH1, ΔH2, and ΔH3 should be quite similar and would in fact be quite similar for any range of reactants combined within 25-50 mL, provided that each is accurately measured. Explain why this is the case.
A student misreads the volume of one of the solutions as 25.0 mL when in fact it was 35.0 mL. Step through the quantitative consequences of this error on the heat generated, the Δ T observed, the q calculated, and the Δ H calculated. (Clarification: Both solutions “should” be 25.0 mL or something close, and one of the volumes is accidentally 35.0 mL)
A student pours the reaction solutions into a still wet Styrofoam cup. Step through the quantitative consequences of this error on the heat generated, the Δ T observed, the q calculated, and the Δ H calculated.
Based on the law of conservation of heat;
Heat losses in a calorimeter will lower the value of enthalpy change, ΔH, for a particular reaction.An error in the volume of one of the reacting solutions will increase the heat generated, the ΔT observed, the q calculated, and the calculated ΔH.Using a wet Styrofoam cup will lower the heat generated, the ΔT observed, the q calculated, and the calculated ΔH.What is a calorimeter?A calorimeter is a laboratory apparatus used to measure heat changes that occur in a reaction.
A calorimeter works on the principle of conservation of heat which can be stated as;
Heat lost by hotter body = Heat gained by colder body.The formula for calculating quantity of heat, q is given as;
q = mcθwhere
m is mass of substancec is heat capacity of substanceθ is temperature changeHeat losses in a calorimeter will lower the value of enthalpy change, ΔH, for a particular reaction.
Error in the volume of substances used will affect the value of the heat generated, the ΔT observed, the q calculated, and the Δ H calculated as follows:
the heat generated will increasethe ΔT observed will increasethe value of q will increasethe value of ΔH will increaseIf the calorimeter used, (Styrofoam cup) is wet when used, the volume of the liquid to be heated will be higher. Therefore, the heat generated, the ΔT observed, the q calculated, and the calculated ΔH will be affected as follows:
the heat generated will decreaseΔT observed will be lowerthe value of q will decreasethe value of ΔH will increaseLearn more about calorimeter at: https://brainly.com/question/1407669
why is chemistry a thing
Answer:
It's a very good subject!
n/ student/teerdządg
Practice 6
The molecules represented in the diagram below can interact to cause a
biochemical process to occur.
Molecule A and molecule B most likely represent
A) a nerve signal and a gene
Molecule A
Molecule B
B
a receptor and a hormone
C) a chromosome and an antigen
D) a starch and an amino acid
Students, draw anywhere on this slide!
Answer:
B
Explanation:
A student places a small amount of water in a glass dish and then carefully places a small paperclip on the surface of the water. The paperclip floats. What happens if the student adds a drop or two of dish soap to the water? Check all that apply. The paperclip falls through the water to the bottom of the dish. The soap acts as a surfactant. The soap increases the surface tension of the water. The soap decreases the surface tension of the water.
When soap is added then the paper clip will fall as soap is a surfactant and decreases the surface pressure. The surface strain of water holds the paper.
What is the mechanism of floatation?The paper clip is lighter in weight and floats on the water surface as the density and mass play a major role in floatation. Any addition of substances like soap will lead the clip to fall or sink.
The addition of the soap lessens the pressure of the water surface as it is a surfactant and will affect the surface strain of water.
Therefore, when soap is added, paper clips will fall.
Learn more about surfactants here:
https://brainly.com/question/11752340
Answer:
1-The paperclip falls through the water to the bottom of the dish.
2-The soap acts as a surfactant.
4-The soap decreases the surface tension of the water.
Explanation:
edge 2022 :)
5
Select the correct answer.
If a stone dropped into a well reaches the water's surface after 3.0 seconds, how far did the stone drop before hitting the water?
ОА
1.4 meters
OB.
44 meters
Ос.
49 meters
OD
54.2 meters
Reset
Next
on samantium All riachte nennund
mentum com/assessments delivery
Answer:
s= 0.5 at^2
0.5 x 9.81 x 3^2 = 44m
Explanation:
OB.
44 meters
a named metal or non metal tent pole
Answer:
non metal, it is made out of aluminum
Explanation:
Elements are made up of one type of atom. Compounds are particles that have more than one atom joined together. They can be ........ or ......
Answer:
metal or non metal
Explanation:
this is the answer
You are investigating the resistance in a piece of wire. You are using the Vernier calipers below to measure the diameter of a piece of wire. What is the diameter of the wire to 2 decimal places?
The reading on the vernier caliper is determined by adding main scale and vernier scale reading.
How to measure the diameter of a piece wire
The diameter of a piece of wire can be measured using Vernier caliper.
The following steps can be used to measure the diameter of the Vernier caliper;
Take the reading on the main scaleTake the reading on the vernierAdd the reading on both scales togetherThus, the reading on the vernier caliper is determined by adding main scale and vernier scale reading.
Learn more about veriner calipers here: https://brainly.com/question/14312914
7moleNaCl
x 6.02E23moleculeNaCl
1moleNaCl
Answer:go molecule you some b1tc1es
Explanation:
A 7. 298 g sample of copper reacts completely with oxygen, forming a copper oxide. The final mass of the copper oxide is 8. 217 g. What is the formula of the copper oxide?.
The formula of the copper oxide would be [tex]Cu_2O[/tex]
Chemical formulaMass of copper sample = 7.298 g
Mass of final product after reacting with oxygen = 8.217
Mass of oxygen = 8.217 - 7.298
= 0.919 g
Mole ratios
Cu = 7.298/63.546
= 0.115
O = 0.919/16
= 0.057
Cu = 0.115/0.057
= 2
O = 0.057/0.057
= 1
Thus, the formula for the copper oxide will be [tex]Cu_2O[/tex]
More on chemical formula can be found here: https://brainly.com/question/21272841
Which of the following models would best represent the inner and outer core of Earth, based on physical characteristics of each layer?
Answer:
No picture :(
Explanation:
There is no picture but if you see a picture wiith a light colored innner core with an orange outer core. thats the one. if you need anymore information just say it :)
can someone help me ??????????????????????????????????????????
Answer:
Lithium-7
Explanation:
By carefully inspecting the diagram we can see three different sub-particles.
1) Electrons (-vely charged, outside the nucleus)
2) Protons (+vely charged, Inside nucleus)
3) Neutrons (uncharged, Inside nucleus)
Mass Number:
Mass number is the number of protons and neutrons present in the nucleus of an atom.
Therefore, in our problem there are 4 neutrons and 3 protons.
So, the mass number is 7.
Atomic Number:
Atomic number is the number of protons present in the nucleus. This number shows the identity of an atom. If you go through the periodic table you will find that the atomic number 3 is for Lithium.
Result:
Lithium-7
There is always some between any surfaces that are in contact with each other
Answer:
Friction that is the answer pls brainlist me
A chemist needs 225 mL of 2. 4 M HCl. What volume of 12 M HCl must be mixed with water to form this solution?.
Basedbon dilution formula, the volume of 12 M HCl required is 45 mL.
What is dilution?Dilution is the process of preparing a less concentrated solution from a more concentrated solution.
The dilution formula is as follows:
C1V1 = C2V2From the given data:
C2 = 2.4 M
V2 = 2.25 mL
C2 = 12 M
V1 = ?
V1 = C2V2/C1
V1 = 2.4 × 225/12
V2 = 45 mL
Therefore, the volume of 12 M HCl required is 45 mL.
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Which orbital diagram represents
helium (atomic number = 2)?
Answer:
its B
Explanation:
right on acellus
What is a trait and where does an organism get its traits from?
Answer:
A trait is a quality of someone got like art and organisms get their traits from DNA.
It appears, in the society shown in the film, that one could have a potential romantic partner/love interest sequenced. Discuss the positive and negative aspects of having this technology available to prospective mates.
is based on GATTACA
This involves lavishing someone with attention, gifts, etc as a result of love and affection being experienced between the individuals.
The film which depicts it however has a positive and negative effect which is mentioned above.
Read more about Romance here https://brainly.com/question/25652231
Angelique wanted to find out what shampoo made her hair the shiniest. Everyday she washed her hair with different shampoos and then rated how shiny her hair was, on a scale of 1-10. She used Pantene, Herbal Essences, and L’Oreal
Answer:
indepndent v - a variable whose variation does not depend on another
dependent v- a variable that depends on the value of another
control - does not revive the treatment in an experiment
constant- can not be changed
Explanation:
In honor of the scientist who worked on the mole concept,6.02x10^23 is also called?
Answer:
Avogadro's Number
Explanation:
6.02 x 10²³ is the number of units it 1 mole.
6.02 x 10 ²³ is known as Avogadro's number
5.Write the seasons in order starting with fall:
define unit cell and explain why the unit cell will always crystallize from solution or break into the same shape
Answer:The structure of solids can be described as if they were three-dimensional analogs of a piece of wallpaper. Wallpaper has a regular repeating design that extends from one edge to the other. Crystals have a similar repeating design, but in this case the design extends in three dimensions from one edge of the solid to the other.
We can unambiguously describe a piece of wallpaper by specifying the size, shape, and contents of the simplest repeating unit in the design. We can describe a three-dimensional crystal by specifying the size, shape, and contents of the simplest repeating unit and the way these repeating units stack to form the crystal.
The simplest repeating unit in a crystal is called a unit cell. Each unit cell is defined in terms of lattice points--the points in space about which the particles are free to vibrate in a crystal.
Lab: Kinetic Energy Assignment: Lab Report
Answer:
Explanation:
In this lab, two pieces of rock, one big one small, are dropped from the same height onto mud. The hole each rock made is measured for its depth. Later, one piece of rock is dropped from different heights and hole made measured. The lab shows relationship between mass, height and kinetic energy.
Answer:
I will take photos.
Sorry I was late btw
Explanation:
There are my answers
The temperature of a freezer started at 18şc. After cooling for a few hours, the freezer had a temperature of –12şc. What is the difference between the new, colder temperature and the original temperature?.
11 Jamila and Ahmed investigate displacement reactions
They put drops of different solutions into the dimples of a spotting tile.
They then add metals to each solution
The diagram shows their experiment.
zinc magnesium copper
metal metal metal
iron
metal
dimple
zinc nitrate
solution
♡
magnesium nitrate
solution
♡
» 2
Кеу
copper nitrate
solution
empty dimple
2
iron nitrate
solution
dimple with
metal and solution
spotting til
(a) Jamila and Ahmed look to see if a reaction takes place.
Suggest what they might see if a reaction takes place.
Based on the activity series of metals, it can be observed that Magnesium being most reactive is not dispalaced by any metal from it's solution whereas copper being the least reactive is displaced by all the metals from it's solution.
What is the activity series of metals?The activity series of metals is an arrangement of metals based on their reactivities, from the most reactive to the least reactive.
Based on the activity series of metals, the following will be observed:
Zinc nitrate solution + magnesium metal = Magnesium dissolves and zinc metal is obtained
Zinc nitrate solution + Copper metal = No reaction
Zinc nitrate solution + Iron metal = no reaction
Magnesium nitrate solution + Zinc metal = No reaction
Magnesium nitrate solution + copper metal = No reaction
Magnesium nitrate solution + Iron metal = No reaction
Copper nitrate solution + Zinc metal = Zinc metal dissolves and copper metal is produced
Copper nitrate solution + Magnesium metal = Magnesium dissolves and copper metal is produced
Copper nitrate solution + Iron metal = Iron metal dissolves and copper metal is produced
Iron nitrate solution + Zinc metal = Zinc metal dissolves and iron metal is obtained
Iron nitrate solution + Magnesium metal =Magnesium metal dissolves and iron metal is obtained
Iron nitrate solution + Copper metal = No reaction
Learn more about activity series of metals at: https://brainly.com/question/17469010
What is the molecule that enters the citric acid cycle.
Answer:
Carbs can be broken down into glucose, the first molecule used during glycolysis. Similarly, proteins can be broken down into their basic parts to form acetyl CoA, the molecule that enters the citric acid cycle.
What happens to particles during
changes of state between solids,
liquids, and gases?
Which term is defined as the change from liquid water to water vapor?.
evaporation is the process of liquid water changing to water vapor
convert 5 mole(s) of Xe into molecules
Answer:
5 mol Xe × 6.02×10^23
------------ ----------------
1 1 mol Xe
3.01x10^24
I would calculate on your calculator to make sure
What is the relationship between specific heat and temperature change of a substance? How are they related to one another?
Answer:
Heat transfer is related to temperature change.
Explanation: