Answer:
C. Thermal energy
Explanation:
Thermal energy is the sum of the kinetic and potential energy of all the particles in an object.
N2(g) + 2 O2(g) → 2 NO2(g)
Answer
Answer:
180.6
Explanation:
N2 (g) + 2O2 (g) → 2NO2 (g) ΔH = 66.4 kJ
2NO (g) + O2 (g) → 2NO2 (g) ΔH = -114.2 kJ
Hope this helped, and please mark as Brainliest :)
1. You have 3.5L of a gas at 6 atm of pressure. The pressure drops to 2.4 atm, what is the new volume of
the gas?
I
Answer:
8.75 LExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we're finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
We have
[tex]V_2 = \frac{3.5 \times 6}{2.4} = \frac{21}{2.4} \\ = 8.75[/tex]
We have the final answer as
8.75 LHope this helps you
Arrange these atoms and ions in order of decreasing radius:
K+ Ar Cl-
Answer:
Cl- > Ar > K+
Explanation:
Due to the fact that they have different nuclear charges, it means their radius will be different.
Now, the positive charge (cation) with the greater charge value will possess a smaller radius due to the fact that its electrons will have greater attraction to its nucleus.
So, the lesser the value of the charge, the larger the radius.
In the question, K+ has the highest value of charge and thus the smallest radius while Cl- has the lowest value of charge and thus the largest radius. So the correct order in decreasing size is;
Cl- > Ar > K+
Why do you think it is a bad idea to use taste, touch, or smell to identify an
unknown chemical?
Answer:
Because it can cause health problems or injuries to our sense organs.
Explanation:
Chemicals in the laboratory are made up of different constituents, which may be dangerous or injurious to health. This is the reason why safety measures or precautions have to be taken when working in the laboratory. One of those safety measures is that "one should never use taste, touch, or smell to identify an unknown chemical".
This is so because a chemical that is unknown amounts to the fact that what such chemical contains is unknown, hence, the chemical might have the ability to cause harm or injuries to the sense organ. For example, a conc. acid that is tasted will burn the tongue etc.
What is the chemical formula (including charge) for the chromate ion?
Answer:
Chromate Chemical Formula
Explanation:
The formula of chromate is CrO42-. The chromate ion usually consists of one chromium atom (+6 oxidation state) and four oxide atoms. The overall charge is -2.
Aptitude Test Formulas: Right Angle Formula
Complex Number Power Formula: Structural F...
Heat Of Solution Formula: Integers Formula
Volume Of Parallelepiped: Prime Number For...
When chlorine reacts with potassium bromide, chlorine displaces bromine.
Cl2 + 2 KBr → Bra + 2 KCI
Explain why chlorine is more reactive than bromine.
Answer:
Chlorine is more reactive than bromine because the chlorine atom has fewer shells and the electronic bonding is much stronger. The electrons are closer to the nucleus, therefore it is easier for chlorine to attract and hold electrons in its outer shell forming stronger bonds with other atoms.
(As you go down Group 7/the Halogens - they get less reactive)
Version: TAKEHOME
1) The ionic compound below is soluble in water. Complete the following:
-Draw the interaction of the ionic compound and water in the proper orientation. 3pts
-On the line below discuss the strength of the interaction within the compound compared to the strength of interaction
between the compound and water.
Answer:
The hydrogens of the water molecules around the bromide ion will need to be faced toward it, whereas the oxygens of the water molecules around the potassium ion will need to be faced toward it.
The strength of the interaction within the compound will supersede that of the interaction between the compound and water.
Explanation:
To answer this question, you need to be aware of the structure of a water molecule and its components. A water molecule has the chemical formula of H2O, and oxygen is inherently electronegative, meaning that it attracts electrons very strongly. As a result, when it is in H2O, it pulls the valence electrons of the H atoms very strongly, which results in the H atoms being partially positively charged and the O atom being partially negatively charged. Therefore, the O atom is going to be attracted to the potassium ion, whereas the H atom is going to be attracted to the bromide ion.
The answer to the second part of the question is as written above because ionic bonds are stronger than ion-dipole bonds; that's just the way it is.
What does chlorination do?
Answer: Chlorination is the process of adding chlorine to drinking water to kill parasites, bacteria, and viruses. Different processes can be used to achieve safe levels of chlorine in drinking water.
CH4O+ O2 → CO2 + H2O
Balance the following chemical equation
Answer:
2 CH4O + 3 O2 = 2 CO2 + 4 H2O
Our Solar System consists of our star, the Sun, and its orbiting planets (including Earth), along with numerous moons, asteroids, comet
material, rocks, and dust. However, our Solar System is only part of space. Place the following in order from biggest to smallest.
A) Galaxy, Universe, Solar System, Star, Planet
B) Universe, Solar System, Galaxy, Planet, Star
C) Solar System, Universe, Galaxy, Star, Planet
D) Universe, Galaxy, Solar System, Star, Planet
Answer:
D
Explanation:
Universe consits of galaxies, galaxies consit of solar systems, and solar systems consist of planets
____________ is refining the extracted raw metals into a purest form
Answer:
Extractive metallurgy
Explanation:
Extractive metallurgy is the practice of removing valuable metals from an ore and refining the extracted raw metals into a purer form.
If 35.4 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP?
Answer:
ujdbdbfbf fbFbsygtsjysnsgndhngsnsgnafbfa
Sam did an experiment. He boiled water in a teapot and saw vapor coming out. When he placed a cold plate in contact with the vapor it formed droplets of water.? Can you imagine what was that process and Why did he observe this?
Answer:
evaporation and condesation
Explanation:
because he was curiuos
How is the periodic table used to determine properties of elements
Answer:
I don't know
Explanation:
hindi ko alam
2. What evidence is there that mass extinction events occurred?
Answer: Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one. Examples, of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
Can someone plz help me with this one problem plz!!!!
Answer:
very top one is sunlight. 2nd top one is oxygen. 3rd top one is carbon dioxide. last one is water
Una solución hallar punto de vista física y punto de vista químico (sal) 50g de sal y 250 ml de agua hallar %m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente
Answer:
% m/m = 16.6%
% m/v = 20%
3.42 m (molalidad)
3.42 M (molaridad)
Fraccion molar del soluto = 0.06
Fraccion molar del solvente = 0.94
Explanation:
Nuestra solución está compuesta por:
Soluto: 50 g de sal
Solvente: 250 mL de agua.
%m/m %m/v molalidad, molaridad, fracción molar del soluto y del solvente son distintas formas de definir la concentración:
% m/m son los gramos de soluto cada 100 g de solución.
No sabemos la masa de solución pero con la densidad del agua (solvente), sabemos que los 250 mL contienen 250 gramos de solvente. (Densidad del agua 1g/mL). En conclusión, la masa de solución es 50 g + 250g = 300
% m/m = (50g /300g ) . 100 = 16.6%
Vamos a definir que el volumen de la solución es igual al del solvente: 250 mL.
% m/v = la masa de soluto, cada 100 mL de solución
= (50 /250) . 100 = 20 %
Molalidad, son los moles de soluto por cada kg de solvente.
Convertimos gramos a kg → 250 g . 1kg /1000g = 0.25kg
Convertimos la masa de soluto (sal) a moles.
NaCl → 50 g . 1mol/ 58.45g = 0.855 moles
m = 0.855 /0.25 → 3.42 m (molalidad)
Molaridad son los moles de soluto por cada L de solución.
Convertimos mL a L → 250 mL . 1kg / 1000mL = 0.25 L
sabiendo que los moles de soluto son 0.855, en este caso la molaridad es igual a la molalidad ( 3.42 M)
Para calcular la fracción molar, necesitamos moles de soluto y de solvente.
Ya contamos con los moles de soluto.
Moles de solvente: 250 g . 1mol /18g = 13.89 mol
Moles totales = 0.855 + 13.89 = 14.745
Fracion molar del soluto: (0.855/ 14.745) = 0.06
Fraccion molar del solvente: (13.89 / 14.745) = 0.94
PLEASEEEE HELPPP??????
Answer:
(B) Grasses to Grasshoppers to Birds to Foxes
Explanation
HELP ASAP!!!
WAVES ALWAYS ORIGINATE WITH SOME
a
person
b
object
C
disturbance
Answer:
Disturbance
Explanation:
I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.
please answer thx will mark brainliest if correct
Answer:
C
Explanation:
Gases have lowest forces of attraction.
Define the unit of current. Name the device which is used to measure
electric current in a circuit. plzz helpp
Answer:
Explanation:
The Unit Of Current is defined as the flow of 1 coulomb of charge in one second . Its unit is Ampere.
An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.
Chlorine has two stable isotopes, C1 and C If Cl has a mass of approximately 34.97 and Cl has a mass of approximately 3697 what percent abundances are each found in?
Answer:
%C₁ = %C₂ = 50%
Explanation:
Set up simultaneous equations to solve for two unknowns,
let f₁ and f₂ = fractional abundances of C₁ and C₂ respectively.
Then f₁ + f₂ = 1.00 and
34.97f₁ + 36.97f₂ = Wt. Avg. Atomic Mass (amu) = (34.97 + 36.97)/2 = 35.97amu
Solve equation 1 for f₂ = 1 - f₁ and substitute into equation 2
=> 34.97f₁ + 36.97(1 - f₁) = 35.97
=> 34.97f₁ + 36.97 - 36.97f₁ = 35.97
=> 2f₁ = 1
=> f₁ = 1/2 = 0.50 => 50% abundance for C₁
=> f₂ = 1 - 0.50 = 0.50 => 50% abundance for C₂
The diagram below shows four coastline locations on Earth with respect to the moon at a given time. Moon A B D C In this current position, which coastline(s) are experiencing a daily high tide? Only A O Only B O Both A and C Both B and D
Answer: Only A
Explanation: The moon controls the tides because of its gravitational pull. The moon's gravitational pull is weaker than Earths that is why the moon's gravitational pull only effectts water on the earth.
CH3OH can be synthesized by the reaction:
CO(g) + 2 H20) — CH3OH)
What volume of CH3OH gas (in L) can be synthesized if 18.6 L of Hy gas completely reacts at STP conditions?
Answer:
5
Explanation:
4.2 L of a gas has a pressure of 560mmHg at 72⁰F. What is the temperature at760mmHg if the volume is still 4.2 L? (5 pts)
Answer:
The temperature at 760mmHg if the volume is still 4.2 L is 400.862 K
Explanation:
Gay Lussac's law indicates that when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases. This law can be expressed mathematically as follows:
[tex]\frac{P}{T} =k[/tex]
Having an initial state 1 and a final state 2, the following is true:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 560 mmHgT1= 72 F= 295.372 K (being 32 F= 273.15 K)P2= 760 mmHgT2= ?Replacing:
[tex]\frac{560 mmHg}{295.372 K} =\frac{760 mmHg}{T2}[/tex]
Solving:
[tex]T2= 760 mmHg*\frac{295.372 K}{560 mmHg}[/tex]
T2= 400.862 K
Which statement describes proper conduct in the laboratory?
Select one:
O a. Eating snacks in the laboratory is allowed.
O b. In order to identify things they should be tasted.
O c. Colorless fumes should be identified by direct smelling.
O d. Be aware of the location of safety and first aid equipment.
Answer:
D.
Explanation:
I mean. It's logic for sure
Answer:
Its D and pls mark brainliest
Explanation:
Using your own words, explain energy.
An illustration of a fire and a pair of hands near the fire.
He concluded that the image shows thermal energy being transferred from the flames to the person’s hands through conduction.
Which best explains Alex’s error?
Thermal energy is being transferred from the person’s hands to the flames.
The image does not show thermal energy being transferred because the molecules of two substances or objects are not in direct contact.
The image does not show conduction because the molecules of two substances or objects are not in direct contact.
Thermal energy is being transferred from the surrounding air to the flames.
Answer:
b
Explanation:
The unit for work is the _______ which is also called the ____________.
How do heavy metals like cobalt, zinc, mercury, and lead get into the environment, and why are they harmful?
Answer:
How they get into the environment