Answer:
A spray of perfume diffusing in a room is a spontaneous process because gas particles have higher entropy when they are spread evenly around the room.
This is true because entropy increase when gas particles spread
Explanation:
ASAP!! Which one of the following substances can be produced during an acid-base neutralization reaction?
A. Al(OH)3
B. HCl
C. H2O2
D. MgBr2
Answer:
c
Explanation:
because it's a form of wayer jgc
Which equation is balanced?
Al+3O2→Al2O3
2Al+3F2→2AlF3
Na+F2→2NaF
Mg+2O2→2MgO
Answer:
3rd one
Explanation:
I just took the test and got 100%
Answer:
2nd one
Explanation:
Took the test
3.2 g of a gas at occupy the same volume as 0.6266 g of CH4 at 17°C at constant pressure
Find the molecular mass of the gas.
Assuming gas temperature = 25, 3.2 g of a gas at 25°C occupy the same volume as 0.6266 g of CH4 at 17°C at constant pressure
The molecular mass of the gas : 842.1 g/mol
Find the molecular mass of the gas.Further explanationGiven
3.2 g of gas
0.6266 g of CH4
Required
the molecular mass of the gas
Solution
Because V, P, and R are the same, from ideal gas law :
PV=nRT
n₁T₁=n₂T₂
n₂=moles CH₄= 0.6266 : 16 g/mol = 0.0392
T₁=25+273=298 K
T₂=17+273=290 K
mol of gas :
[tex]\tt n_1=\dfrac{n_2.T_2}{T_1}=\dfrac{0.0392\times 290}{298}=0.038[/tex]
molecular mass :
[tex]\tt M=\dfrac{3.2}{0.038}=842.1[/tex]
How many bonds and lone pairs are in the molecule SIH4?
A.2 bonds, 2 lone pairs
B.4 bonds, 4 lone pairs
C.no bonds, 4 lone pairs
D.4 bonds, no lone pairs
Answer:
there are no valence electrons left over, so the molecule has four bond pairs and no lone pairs.
Explanation:
Select three parts of the cell theory.
A- All cells come from pre-existing cells.
B- Cell is the official name of the smallest unit of life.
C- All plants and animals are made from cells.
D- Cells are the basic unit of structure and function in organisms.
What is the main characteristic of altruistic love? A. admiration B. unconditional love C. passion D. tenderness
Answer:
B. unconditional love
Explanation:
Answer:
B unconditional love
Explanation:
someone plss help me ASAP
Answer:
18
Explanation:
You add the two numbers on the bottom left (8 and 32) and then subtract the number On the bottom middle right (22) from it (40-22=18) and then the answer to that gives you the answer of how much water is produced.
hope that helped :)
In which interaction is the prey harmed?
Commensalism
Competition
Mutualism
Predation
Answer:
predation.
Explanation:
predation. means the preying of one animal on others
Answer:
Predation
Explanation:
Because one organism eats another. The PREDATOR benefits, the PREY is harmed.
Hope it helps!
What family has 4 valence electrons?
Answer:carbon group
Explanation:
Which statement best describes physical properties?
A. Physical properties behave identically for all matter under the same conditions.
B. Physical properties can be observed without changing the identity of a substance. C. Physical properties are observed by seeing how a substance reacts with other substances.
D. Physical properties cause atoms and molecules to change structure when substances are mixed.
Answer:B
Explanation:
According to the cup wall diagrams, why does the double wall vacuum
sealed cup outperform the other two cups
Because the particles are moving so fast in a vacuum that
they are able to pass through the walls and transfer more
kinetic energy to the liquid in the cup.
B
The vacuum allows for the all of the particles to pack in tightly
therefore nothing can pass through.
There is little to no transfer of kinetic energy between the
walls of the cups because there are no particles in a vacuum.
And since there is little to no transfer of kinetic energy there
is little to no transfer of temperature. Therefore the liquid
inside stays warmer/colder longer.
The particles in a vacuum do not move at all. Therefore there
is no kinetic energy and nothing can be transferred.
Answer:
i do not now
Explanation:
The mass of a person on Earth is 72 kg. What is the mass of the same
person on the Moon where gravity is one-sixth that of Earth?
12 kg
60 kg
432 kg
72 kg
Answer:
72kg
Explanation:
mass does not change with gravity but weight would :)
Which of the following explains a difference between genes and chromosomes
Answer:
Dude I need the answers so i can help you!
Explanation:
Give me the answers plz
Which is one of the reactants in Reaction A?
Group of answer choices
copper
water
silver
sodium
Answer:
Water is one of the reactants
a student wrote The Following hypothesis if more salt is added to a hypothesis
Answer:
i love adding salt to my hypothesis
Explanation:
162.4 NH3 =____mol NH3
Answer:
162.4
Explanation:
Because yea thats the answer no need to tell you why ok bye
2. What is true about the position of all metals in
the periodic table?
A. They are in the first group.
B. They are in the bottom period.
C. They are in the rightmost column.
D. They are to the left of the zigzag line.
Answer: D they are to the left of the zigzag line.
Explanation:
The first group are alkali metals and therefore wrong. The zigzag line is composed of semimetals and to the left we have metals like magnisum and metals are always bottom right in the table.
Symptoms of a mental disorder are ways of
unusual.
feeling, or acting that are
A. thinking
B. sleeping
C. working
D. imaging
Answer: thinking
Explanation:
A mental disorder are ways of unusual feeling, or acting that are thinking. Therefore, option A is correct.
What is mental disorder ?A clinically significant impairment in a person's intellect, emotional control, or behavior is what is known as a mental disorder. It is typically linked to distress or functional impairment in key areas.
Mental illness has many causes, not just one. Your genes and family history are only two examples of the many variables that can increase your risk for mental illness. Your life experiences, particularly if they occurred as a youngster, such as stress or a history of abuse.
Depression is the most prevalent mental condition, affecting an estimated 300 million individuals, and often affects women more frequently than males.
Thus, option A is correct.
To learn more about mental disorder, follow the link;
https://brainly.com/question/939408
#SPJ2
Why must the final product of a decay series be stable?
a. The daughter isotope of any radioactive decay is stable.
b. No decay chain can emit more than two particles.
c. Each decay results in a net loss of particles.
d. If the daughter isotope is unstable, it will decay.
Answer:
I think its d
Explanation:
Because isotopes decay due to being unstable so if the daughter isotope is unstable it will just decay till it produces a stable isotope
Answer:
d. If the daughter isotope is unstable, it will decay
Explanation:
got it correct on quiz
Which of the following is NOT a chemical change?
A. Tarnishing silver
B. Melting butter
C. Digesting food
D. Baking a cake
Answer:
Melting butter
Explanation:
You can reverse the change of butter back to its original state but you can never reverse the rest back to there original state
After studying weather, Beto bought a simple weather station and put it up in his yard. He was especially interested in wind and how it forms around Earth. Choose the correct words or phrases to complete the sentences.
Incomplete question. The remaining part reads;
Choose the correct words or phrases to complete the sentences.
Global winds occur due to
1. Choose...
a. solar currents
b. convection currents
c. sea breezes
d. uneven heating
over a large area and this forms
2. Choose...
a. solar currents
b. convection currents
c. sea breezes
d. uneven heating
caused by cool and warm air.
Answer:
1. d. uneven heating
2. b. convection currents
Explanation:
1. What Beto should know is that as the earth moves and rotates around the sun, some parts of the Earth receive more sunlight and others less, which then leads to uneven heating over a large area of the earth.
2. This uneven heat then forms a convection current containing varying patterns of air spreading to various parts of the globe.
Which part of the ocean has the lowest temperatures and highest salinity?
Answer:
The north atlantic contains the warmest and saltiest water of the major oceans, the southern ocean is the coldest, the north pacific has the lowest average salinity. This density signature is locked into the water parcel when it sinks
Explanation:
i think
A particular state of matter has atoms that are packed closely together and vibrating in fixed positions. A phase change occurs and the matter changes to a state where the atoms are spaced far apart and are moving about randomly. What can you infer has occurred?
Answer:
it goes to a solid to a liquid
Explanation:
When something is a solid the molecules are impact together and have a small sense of vibration. But as the solid melts away for example ice, the molecules become more loose forming into a liquid
Answer:
demos los
Explanation:
Which of these do plants need for photosynthesis to occur?
OA.
glucose and water
ов.
glucose and carbon dioxide
OC.
water and carbon dioxide
OD.
water and oxygen
Answer:
OC. water and carbon dioxide
Explanation:
The equation for photosynthesis is Carbon dioxide plus water plus light energy yields sugar (glucose) and oxygen
Answer:
Water and carbon dioxide
Explanation:
We learned this in Grade 2.
Is it possible to have more atoms on the product side of a chemical reaction than there are on the reactant side? Explain why or why not.
Answer:
No, you cannot.
Explanation:
Due to the Law of Conservation of Energy all chemical equations have to be balcned. The Law of Conservation of energy states that matter cannot be neither created nor destroyed. By having more atoms on either side, you are breaking this law.
How are a proton and a neutron alike?
A. Each is found outside the nucleus.
B. Each has a positive charge.
C. Each has a mass of1 amu.
D. Each has a charge that balances the charge of an electron.
A. Each is found outside the nucleus
How many atoms of hydrogen appear to be on the reactant side?
Answer:
Two
Explanation:
In chemical equations, the number of atoms of each element in the reactants must be the same as the number of atoms of each element in the products.
Answer: 2 it has two
Explanation:
The daily rotation of Earth causes ______ and _____. *
High Tide
Low Tides
Day
Night
Spring Tide
Neap Tide
Really need this!! for a big grade! thank you guys ~ please help!
Answer:
Day and Night
Explanation:
Google :)
The compound Mg(OH)2 is incorrectly named magnesium dihydroxide.
Explain the errors)
Answer:
Mg(OH)2 is an inorganic compound and it's a base.
because it has a hydroxide ion and its name is magnesium hydroxide
Which organism is able to form organized patterns of behavior through the process of integration because it has ganglia?
-mouse
-shark
-grasshopper
-flatworm
Answer:
flatworm
Explanation:
