Answer:
Gas>Liquid>Solid
Explanation:In a gas state, molecules are allowed to move freelyand rarely collide into nearby particles. In a liquid state, the molecules are contained within the liquid and occasionally bump into each other. now in a solid state the atoms arrange themselves into a structure that the atoms sit very tightly next to each other, sometimes vibarating
4) In the experiment, why do you think they started with water that was the same temp (118 °F) for each
cup?
5) For this experiment, do you think it would it matter if the cups were different sizes, thickness, or had
different amounts of water?
Answer:
4. I think that they started with water that was the same tsmpurature because if they didnt start with the same temp of water then it would be harder to tell which one was better. and could hold the most heat.
5. yes i think it would matter, because if you have more water in one cup it might stay warmer than it would with the cups with less water, and if it was thicker it would hold mor heat because it is not so thin that the heat is just gonna come out it has to come through more for the heat to get out.
Explanation:
sorry if these are to long but thats how i would answer them.
hope it helped
Balancing the equation below:
Can anyone please help me out with this formula equation.
Answer:
1: 1, 2, 3
2: 2, 2, 3
3: 2, 1, 2, 1
Explanation:
A simple way to do this:
Take an extra page and write your formula at the top, then take your elements (for example in #1, N and H) and write them on the reactants and products sides. On the reactants side write down the numbers you have (N-2, H-2) and the same for the products side (N-1, H-3). Find your GCF's and then you got your answer. It takes a bit of time to figure out HOW to do it but its a good skill to have. I have attached #1 for you.
If you have questions let me know!
Hope that helps
explain the classification of elements into block
Answer:
Explanation:
The elements in the long form of periodic table are classified into four blocks. They are s, p, d and f-block elements. The classification is based on the name of orbitals which receive the last electron. The elements in which the valence shell electron enters the s-orbital are called s-block elements.
why is sodium chloride solution a good conductor of electricity but does not have any effect on litmus paper?
Answer:
Sodium chloride solution contain free electron to conduct electricity. But in solution is not acid or basic media that is why not active in litmus paper
Explanation:
The sodium chloride solution a good conductor of electricity but does not have any effect on litmus paper because sodium chloride solution have free electron to conduct electricity. But in solution is not acid or basic media.
Why is sodium chloride solution a good conductor of electricity?The sodium atoms and chlorine atoms separate when sodium chloride dissolves in water due to the influence of the water molecules. They are free to move as positively and negatively charged ions in the water. This charge separation enables the solution to conduct electricity.
Because cane sugar is a covalent compound bonded by electron sharing, a solution of cane sugar does not conduct electricity. There are no ions in the solution to conduct electrical charges across the solution.
Thus, sodium chloride solution have free electron to conduct electricity. But in solution is not acid or basic media.
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what is the gram formula mass of NazC03
Answer:
84,007 g/mol
Explanation:
Molar mass of NazCO3 which is Sodium Bicarbonate (NaHCO₃) is 84,007 g/mol
Can you use molecular orbital theory to explain why fluorine is such a highly reactive gas?
The reactivity of fluorine can be explained from molecular orbital theory with the calculation of the bond order.
What is molecular orbital theory?The molecular orbital theory is assigned to explain the movement of the electrons in the bonding and anti-bonding orbitals.
The number of atom in the bonding and anti-bonding atomic orbits results in the elucidation of the bond order for the element.
The bond order and reactivity are inversely proportional to each other. The higher bond order depicts the presence of stronger bonds between the molecules and lower reactivity.
The bond order of fluorine atom is elucidated from the molecular orbital theory. The bond order of fluorine atom is 1, that explains the high reactivity of fluorine.
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Which two elements in the d block do not transition and what are their changes when they make ions?
Answer:
scandium or zinc i think
Explanation:
how do you figure out how many neutrons you have? HELP
Answer:
The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number.
help me pwease it's due tomorrow
Answer:
1. 50 km/hr
2. 5 m/s
3. 180 km/hr 50 m/s
4. 30.56 m/s
5. 11.4 km/hr
Explanation:
#1 500 km/ 10 hours = 50 km/hr
#2 100 m/ 20 s = 5 m/s
#3 540 km/3 hrs = 180 km/hr
180 km/1 hr x (1000 m/ 1 km) x (1 hr/ 60 minutes) x (1 minute/ 60 seconds) = 50 m/s
what is the maximum number of electrons that can exist in the g sublevel?
Answer:
14 electrons max
Explanation:
The s sublevel just has one orbital, so can contain electrons max
If you compare the mass of a
substance before and after a
change, what will you find?
A. The mass before is greater than after.
B. The mass before equals the mass after.
C. The mass after is greater than before.
Answer:
the answer is (B)
the mass before equals the mass after
What type of bond exists when valence electrons are collectively attracted to positively-charged nuclei but are still mobile enough to travel among all of the nuclei?
a) ionic
b) metallic
c) covalent
d) London dispersion
Answer:
Ionic bond
Explanation:
Use the reaction to answer the question.
Zn + 2HCI - ZnCl2 + H2
Which type of reaction is this?
(1 point)
o electronegative
O replacement
combustion
O ionic
Answer:
i think its replacement
Explanation:
By definition, the correct answer is the second option: the reaction is a replacement.
A simple substitution reaction or simple displacement reaction, called single-displacement reaction, is a reaction in which an element of a compound is substituted by another element involved in the reaction.
The starting materials are always pure elements and an aqueous compound. And a new pure aqueous compound and a different pure element are generated as products.
The general form of a simple substitution reaction is:
AB + C → A +BC
where C and A are pure elements; C replaces A within compound AB to form a new co, placed CB and elementary A.
A single-displacement reaction is characterized by a place of exchange of cations or anions with another to form a new product. A begins as an ion in the solution and appears elementally in the reaction products. In case of reagent C it starts in its elemental form and ends as an ion in an aqueous state forming compound BC.
In this case, it is a single replacement reaction where 1 atom of Zinc metal displaces 2 H⁺ ions from the hydrochloric acid to form hydrogen gas and zinc chloride, a salt.
Finally, the correct answer is the second option: the reaction is a replacement.
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https://brainly.com/question/11666844?referrer=searchResultshttps://brainly.com/question/21250889?referrer=searchResultshttps://brainly.com/question/7039713?referrer=searchResultsWhich of the following is NOT an environmental threat from the use
of coal?
Select one:
O a Water Pollution
Ob Sound Pollution
Oa Solid Waste Buildup
O d. Air Pollution
Which halogen has 5 energy levels?
O iodine
bromine
Xenon
O nitrogen
Answer:
nitrogeno
Explanation:
creo xdddd
Answer:
bromine
Explanation:
(Ar)3d10,4s2,4p5
Number of electrons present in 10th shell of
an atom
Answer:
there will be 8 electrons
how will beta decay affect the atomic number and mass number of the atom?
Answer:
Beta decay changes the atomic number of the nucleus by increasing the number of protons, by decreasing the number of neutrons while leaving the atomic mass essentially the same.
nucleolus what is a nucleolus
Answer:
Its a small dense spherical structure in the nucleus of a cell during interphase.
The measure of the average kinetic energy of molecules is known as
Answer:
Temperature is a measure of the average kinetic energy of the particles in a substance.
Explanation:
(No link sharing)
The Law of Conservation of Mass states that
A. chemical reactions destroy matter, which
decreases the mass of the substance,
B. chemical reactions create new matter, which
will increase the mass of the substance,
C. matter cannot be created or destroyed, just
changed
The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed.
What group is this Element in?
Group 3
Group 4
Group 7
O Group 1
Answer:
Explanation:
It contains the elements titanium (Ti), zirconium (Zr), hafnium (Hf) and rutherfordium (Rf). This group lies in the d-block of the periodic table. The group itself has not acquired a trivial name; it belongs to the broader grouping of the transition metals.
At what temperature does ice melt at 101kPa?
Answer:
Explanation: I also have a question if anyone can help in chem please
How many mg of salt are in a 2.78 kg bag of salt?
Answer:
2,780,000mg
Explanation:
Using the Metric Staircase photo provided, you can calculate how many mg there are in 2.78 kg by simply moving the decimal point six places to the right, since the "Kilo" step takes six places to move to the "Milli" step.
2.78 kg
---------------
2 7 8 0 0 0 0 .
we can see that the decimal point is moved to the right six places.
Answer:
2,780,000mg
Use the diagram below to answer the Question.
Which convection zone region is shown at point 3?
Question 6 options:
polar region
temperate region
tropical region
Answer:
It should be tropical
Explanation:
tropical is the closest to the equator
BRAINLIEST?
After many years,which cross section would pay likely result
Use your own words to define Resultant:
Use your own words to define Resultant
Answer:
the outcome of something
Methane's chemical formula is CH. Is there a bond between any of the hydrogen atoms? Why or why not? (1 point)
O No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
Yes, there is because they form a long chain in order to all have stable outer energy shells.
O No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.
Answer:
No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
Explanation:
from the shape of methane which is tetrahedral it's evident there's no hydrogen bond only C-H bond.
The chemical formula of methane is [tex]CH_4[/tex] but: C. No, there is no bond between any of the hydrogen atoms because it would form [tex]H_2[/tex] instead of methane if hydrogen bonded with itself.
A chemical bond is defined as the forces of attraction existing between ions, crystals, atoms or molecules and they are mainly responsible for the formation of chemical compounds.
This ultimately implies that, a chemical bond refers to a force holding two or more atoms together and binding ions, crystals, or molecules together, in order to form a chemical compound.
Methane comprises of an atom of carbon and four (4) atoms of hydrogen.
Basically, hydrogen only shares a single (one) valence electron with carbon but not itself (hydrogen atoms) to form methane because of the [tex]sp^3[/tex] hybridization.
Hence, there is no bond existing between any of the four (4) hydrogen atoms because it would form [tex]H_2[/tex] instead of methane ([tex]CH_4[/tex]), if hydrogen bonded with itself.
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Pls help me with this chemistry work.
This seems to be a Hess' Law problem. Hess' Law states that "states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes." (Libretext)
Compare the step reaction to the final reaction to see the similarity and differences. We may have to flip an equation or multiply it by a constant to obtain the number of moles of the species in the final equation. Just remember, whatever we do to the equation, we have to do to the ΔH as well.
3C + 4H₂ → C₃H₈ ΔH= +104 kJ [1]
C + O₂ → CO₂ ΔH= -394 kJ [2]
2H₂ + O₂ → 2H₂O ΔH= -572 kJ [3]
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O ΔH = ?
_____________________________________________
Compare the Equation
Equation [1]
In [1] the C₃H₈is on the product side. But the final equation has the C₃H₈ on the reactant side. Thus we have to flip the equation. This flips the sign of ΔH.
C₃H₈ → 3C + 4H₂ ΔH= - 104 kJ [1]
Equation [2]
The CO₂ in the final equation is on the product side but is 3 moles. Thus we have to multiply [2] by three. The ΔH is also multiplied by 3.
3C + 3O₂ → 3CO₂ ΔH= 3 (-394 kJ) [2]
Equation [3]
The H₂O in the final equation has a coefficient of 4. Thus we have to multiply [3] by 2.
4H₂ + 2O₂ → 4H₂O ΔH= 2(-572 kJ) [3]
Combine the Equations
Combine the newly sorted versions of the equation and simplify to see if it matches the final equation. We also add the ΔH.
⇒ C₃H₈ + 3C + 3O₂ + 4H₂ + 2O₂ → 3C + 4H₂ + 3CO₂ + 4H₂O
ΔH= - 104 kJ + 3 (-394 kJ) + 2(-572 kJ)
⇒ C₃H₈ + + 5 O₂ → 3CO₂ + 4H₂O
ΔH= - 104 kJ + 3 (-394 kJ) + 2(-572 kJ) = −2430 kJ
∴ the ΔH of the final equation is −2430 kJ.3. How many seconds would it
take o radio wave to travel
from the planet Mars to
Earth when they are the
closest?
(Closest distance from Mars
to Earth = 54.6 million
kilometers)
Answer:
270 sec . ( = 4 min . 30 sec . ) Explanation: Any radio wave is moving at the speed of light, regardless of the frequency, so the frequency should be superfluous information. The speed is light is close to 300 , 000 k m s I take the distance you are given, to be 8.2 ⋅ 10 7 k m (since 8.2 ⋅ 107 k m doesn't make good sense - it's less than 1000 km) i.e. 82 , 000 , 000 km.
Before we actually compute this, we can notice that this is a little more than half the distance of the earth from the sun (150 mill. km), a distance the light uses 500 sek. = 8 min 20 sec. to travel, so we should get about 4 1 2 min for the radio wave to reach Mars from the earth.
Actual calculation: 82 , 000 , 000 km/300 , 000 k m s = 820 3 s = 273.3 s As the distance is given with 2 significant figures, we round this off to 270 sec = 4 min 30 sec.
Explantation:
Hope this helps =)
. What is the total number of protons, neutrons,
and electrons in a cadmium, Cd, atom that has
a mass number of 112?
PLEASE I NEED HELP
Answer:
# of Proton: 48
# of Electron: 48
# ofNeutron: 64
Explanation:
The atomic number of cadmium is 48.
∴ atomic number = protons = electrons = 48.
Neutrons = mass number - atomic number
∴ Neutrons = 112 - 48 = 64.
⇒ number of protons= 48; neutrons= 64; electrons=48