Responda:
+ 0,9kJ / mol
Explicação:
Dados os calores de combustão do enxofre monoclínico e enxofre rômbico como - 297,2 kJ / mol e - 296,8 kJ / mol, respectivamente para a variação na transformação de 1 mol de enxofre rômbico em enxofre monoclínico conforme mostrado pela equação;
S (mon.) + O2 (g) -> SO2 (g)
Uma vez que são todos 1 mol cada, a mudança na entalpia será expressa como ∆H = ∆H2-∆H1
Dado ∆H2 = -296,8kJ / mol
∆H1 = -297,2kJ / mol
∆H = -296,8 - (- 297,2)
∆H = -296,8 + 297,2
∆H = 297,2-296,8
∆H = + 0,9kJ / mol
Portanto, a mudança na entalpia da equação é + 0,9kJ / mol
An atom has a mass number of 9 and 5 neutrons. What is its atomic number?
O A. 19
B. 14
C. 11
D. 4
Answer:
D.4
Explanation:
Number of neutron= mass number - atomic number
where; d no of neutron is 5
d mass no is 9
atomic number be x
5=9-x
x=9-5
x=4
Answer: B 4
Explanation:approved
How many orbital shells does period 4 contain?
Answer:
it contains 30 orbitals
Which of the following is the most stable?
A.Hydrogen
B.Lithium
C.Helium
D. Sodium
E.None of the above
High-frequency sound waves have a shorter_____ and a higher ______ than low frequency sound waves.
Answer:
High-frequency sound waves have a shorter wavelength and a higher amplitude than low frequency sound waves.
recall what you have learned about continental drift and tectonics. sort the information into the correct categories
Answer: Continental Drift - Pangea broke and spread apart, Continents were once landmass
Plate Tectonics - Lithosphere is made of large pieces, Plates move and interact, Landforms result from moving plates.
Explanation: Your welcome.
Answer:
Just for the persons that want to be sure.
is ripping paper a chemical or physical app
Answer:
physical change
Explanation:
it doesnt change it chemically
Answer:
Ripping paper is physical
Explanation:
The way you know if it is physical or not is does it change physically, any physical change
No chemical changes occurred because the chemical matter didn't change nor did the actual object, it's not like the paper turned into a hotdog so it would be physical (if that makes any sense ;))
Convert 34.5ml to L It has to be done in dimensional analysis with correct significant digits.
Answer:
0.0345L
Explanation:
:)
What is the percent abundance of Pt-198, if the average atomic mass of platinum is 195.16 and platinum has four naturally occurring isotopes? A) 6% B) 8% C) 25% D) 50%
Answer:
Explanation:
8%
under the same conditions of temperature and pressure, three different samples of the same uniform
a. shape
b. density
c. mass
d. volume
Answer: B
Explanation: Have to be careful here.Clearly, the samples could have different mass, and COULD have different volume and they could be either solid, liquid or gas.
Strawberry Hope: "Hey Strawberry Cow here! Hope this helps! Hope you have a great afternoon!"
~Strawberry Cow~
Under the same conditions of temperature and pressure, three different samples of the same uniform shape.
The density of a substance is in intrinsic property. Irrespective of the temperature and pressure or any other condition, the density of a substance will not change.
Mass is the quantity of matter in a substance and it is not affected by the temperature or pressure of the object.
The volume of the a substance changes with change in temperature and pressure but we have been told that these conditions are the same so the volume of the object does not change.
However, if the objects are exactly uniform, at the same temperature and pressure, the objects will have the same shape.
Learn more: https://brainly.com/question/9196460
The density of aluminum is 2.7 g.ml. what is the volume of 16.2 grams? HELP
Answer:
The answer is
6.0 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
density = 2.7 g/mL
mass of aluminum = 16.2 g
The volume is
[tex]volume = \frac{16.2}{2.7} [/tex]
We have the final answer as
6.0 mLHope this helps you
Need help with this
Answer:
Environmentalism
Explanation:
Environmental Science is the pursuit of knowledge about the environment, while Environmentalism as you know, "a social movement dedicated to protecting the natural world and people from undesirable changes".
How does inclusions represent the principles
Will give 15 points
write down the importance of nitrogen cycle
Answer:Nitrogen is a crucially important component for all life. ... It is an important part of many cells and processes such as amino acids, proteins and even our DNA. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.
What does the word homogenous mean?
Answer:
Homogeneous means composed of parts of different kinds; having widely different elements or components.
Explanation:
Which element is malleable and ductile?
○Flourine O Gallium
O Silicon O Phosphorous
Answer:
Gallium
Explanation:
The element that is malleable and ductile is gallium.
Gallium is a metal that exhibits the properties of malleability and ductility.
The ability of a material to be hammered or rolled into thin sheets without breaking or shattering is referred to as malleability. This characteristic of gallium makes it simple to shape or flatten it under pressure without shattering.
Contrarily, ductility describes a material's capacity to be pulled into thin wires without cracking. Gallium is ductile, which means it can be bent into the shape of thin wires without breaking.
Therefore, the correct option is gallium.
Learn more about gallium here:
https://brainly.com/question/29456292
#SPJ 2
graphite conducts electricity but dimond does not .why?
Graphite can conduct electricity because of the delocalised (free) electrons in its structure. These arise because each carbon atom is only bonded to 3 other carbon atoms. ... However, in diamond, all 4 outer electrons on each carbon atom are used in covalent bonding, so there are no delocalised electrons.
What is the pressure, in atm, of 1.0 moles of neon gas in a 5.0 L steel container at a temperature of 291 K?
Answer:
4.78atm
Explanation:
given: v=5L R=0.0821LatmK^-1*291K
n=1mol T=291K
PV=nRT
P= 1mol*0.0821LatmK^-1*291K / 5.0L
=4.78atm
An earthquake on the ocean floor produced a giant wave called a tsunami. The tsunami traveled through the ocean and hit a remote island, causing a lot of damage. Is the water that hit the island the same water that was above the earthquake on the ocean floor?
Answer:
Yes
Explanation:
What cause an earthquake is when the earth plates shift and if theirs a drop in the tentonic plates a ripple effect like when you drop something in water will occur. The plates shift down the water in which the plate shift down the water will go in that direction due to gravity, but instead of equalizing the water will pick up some speed and velocity and begin to form a wave now. When an tsunami happens you know it coming cause the water moves back cause the water is picking up to much speed and due to cohesion its moves along with the move water and builds up. Creating a massive tidal wave known as tsunamis.
The water that hit the island is not the same water that was above the earthquake on the ocean floor. Waves transfer energy not matter.
It should be noted that the earthquake on the ocean floor that produces a giant wave referred to as a tsunami is quite different from the water that hits a remote island, causing a lot of damage.It should be noted that waves transfer energy but not matter. While waves are able to transfer energy over a particular distance, it doesn't move the matter along the same distance.For example, it should be noted that an ocean wave is able to travel for several kilometers while the water itself doesn't move.In conclusion, waves transfer energy not matter.
Read related link on:
https://brainly.com/question/24673995
identify and describe one common electrostatic phenomenon
Answer:
There are many examples of electrostatic phenomena, from those as simple as the attraction of the plastic wrap to one's hand after it is removed from a package to the apparently spontaneous explosion of grain silos, the damage of electronic components during manufacturing, and photocopier & laser printer operation
Solubility of CO2 in g/100 g water
Solubility of Oz in g/100 g water
Temperature in °C
Independent Variable
Dependent Variable
pls helppp asap
Answer:
Temperature - Independent variable
The solubility of CO2 and Solubility of O2 - Dependent variable
Explanation:
There are always two variables in an experiment: Independent and dependent variables.
Independent variables are defined as the variables that can be controlled or changed to measure its effect on the dependent variable and the dependent variable is influenced by the change in Independent variables.
In the given example, the temperature is the Independent variable and the solubility of CO2 and Solubility of O2 is the dependent variable because the solubility of CO2 and O2 decreases as temperature increases.
Hence, the correct answer is:
Temperature - Independent variable
The solubility of CO2 and Solubility of O2 - Dependent variable
ANALYZE Define a system you interact with every day. Is the system
open, closed, or isolated? How do matter and energy flow into, out
of, or within the system?
Answer:
A system that we use daily or almost every day is, for example, when boiling water for cooking.
Explanation:
This is the case of an open system.
Boiling water in a pot without a lid, exchanges heat energy and mixes with its surroundings when it enters a gaseous state.
The energy introduced into the system by the fire transforms the water into gas, which is released back into the environment. Without that constant heat injection, the water will stop boiling; and without room to get out, the steam (matter) will increase the pressure until the pot burst.
You can find examples like these anywhere, knowing the definition of each system:
Open systems. The most predominant of all, are characterized by exchanging energy and / or matter with the environment that surrounds them, either taking from it, expelling towards it or both. Closed systems. Unlike the previous ones, they exchange energy (heat, work) with the outside, but never matter (their mass remains intact). Isolated systems. They are so called because they do not exchange energy or matter of any kind with their environment, they are considered a system disconnected from the dynamics around them. Completely isolated systems do not really exist in the universe, so they are considered cases of abstraction in determined periods of time. They are assumed in thermodynamic equilibrium.Which of these has the lowest first-ionization energy?
A) Cs
B) Ag
C) Pb
D) Br
E) Se
Answer:
Francium is the answer
The space shuttle heats up during reentry. Which term best describes what is causing
this?
O friction
O gravity
O acceleration
o velocity
Choose the best description of a covalent bond from the choices below.
A. Two water molecules interact due to partial charges on the oxygen and hydrogen atoms.
B. A magnesium donates electrons and forms bonds with two chloride ions.
C. A bond forms between a hydrogen from one molecule and a nitrogen from another molecule.
D. A positive potassium ion forms a bond with a negative chloride ion.
E. A nitrogen atom shares electrons with three hydrogen atoms
Answer:
A. Two water molecules interact due to partial charges on the oxygen and hydrogen atoms
Explanation:
A covalent bond is formed when the sharing of the two electron pairs and creates a stable balance of attractive and repulsive forces. The sharing allows the atoms to attain the equivalent of the outer shell. Sharing corresponds to the stable electronic configuration.Hey is plasma a state of matter
Yes or no
I will mark you brainliest
Answer:
no
Explanation:
fountain experiment is related to......... gas.
1.Oxygen. 2.nitrogen
3.carbondioxide. 4.ammonia
Answer:
4. ammonia
fountain experiment is related to ammonia gas.
Of these non-metals which one is likely to be least reactive
Answer:
the answer is the swecond option
Explanation:
Its b ur well come
Write 750,000 in scientific notation
Answer:
Explanation:
scientific notation of 750000 is
7.5*10^5
When thermal energy is added to an object, what happens to the motion of the particles?
A sample of platinum has a mass of 16.1 g and a volume of 0.75 cm^3. What is the density of platinum?
