Answer:
P₂ = 80 KPa
Boyle's law is applied.
Explanation:
Given data:
Initial volume = 180 L
Initial pressure = 35.5 KPa
Final pressure = ?
Final volume = 80.0 L
Solution:
The given problem will be solved through the Boyle's law,
"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"
Mathematical expression:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = initial volume
P₂ = final pressure
V₂ = final volume
Now we will put the values in formula,
P₁V₁ = P₂V₂
35.5 KPa × 180 L = P₂ × 80.0 L
P₂ = 6390 KPa. L/ 80.0 L
P₂ = 80 KPa
An element is any substance that cannot be broken down into simpler substances. The smallest unit of an element is called an _________.
compound
gene
atom
cell
Answer:
An Atom
Explanation:
An atom is the smallest unit of matter
Why is it more practical to stimulate an experiment than to actually perform the experiment?
Answer:
Practical stimulation is easy since you don't have to use energy.
Explanation:
Doing the experiment is quite difficult as it takes time and require one to be focused without any interruptions
How many mole are there in 7.2 x 1023 formula units of H2S04?
How many moles of oxygen gas (O2) are required to completely react with 10 moles of hydrogen gas (H2)?
Answer:
5 moles of oxygen are required.
Explanation:
Given data:
Moles of O₂ required = ?
Moles of H₂ present = 10 mol
Solution:
Chemical equation:
O₂ + 2H₂ → 2H₂O
Now we will compare the moles of oxygen and hydrogen.
H₂ : O₂
2 : 1
10 : 1/2×10 = 5 mol
5 moles of oxygen are required.
which of the following represents C410H?
PLEASE HELP ME
Answer:A
Explanation:
if you count the atoms you see that there four dark (carbon) and ten light (hydrogen)
Geologists can use a radioactive isotope's to help determine the age of some rocks. A. half-life B. growth rate C. double-life D. all of these
Answer:
A) Half-life
Explanation:
The Half-Life is the time taken for a specified isotope's radioactivity to fall to half its original value. Which depending on how radioactive the isotope is, determined its age between different half-lives.
What 3 properties did Mendeleev write on his cards to organize 63 elements?
what is the reaction type?
Answer:single displacement reaction
Explanation:
Which of the following is an example of how the same chemicals used to
help people can harm the environment?
OA. Hillsides erode after plants are removed to clear a space for
O B. Phosphates are removed from detergents so they don't end up in
c. Excess fertilizers run off into rivers and create a dead zone.
OD. Plants grow back after toxic chemicals are removed from the
crops.
drinking water.
surrounding soil
Answer:
c. Excess fertilizers run off into rivers and create a dead zone.
Explanation:
One very clear cut example of how the same chemicals used to help people can harm the environment is shows is through the excess fertilizers that run off into rivers and create a dead zone.
Fertilizers are chemical substances that are used to increase farm yield. They are rich in nutrients that plants would need to ensure their proper growth. When these fertilizers gets washed into water bodies, the cause enrichment and a nutrient glut. It takes a lot of energy and oxygen to break them down thereby leading to a dead zone formation.how are changes in state related to thermal energy and particle motion
Answer:
search it
Explanation:
WHICH PROPERTIES OF A SOLID ARE SHARED WITH LIQUID BUT NOT WITH GAS
ANSWER QUICKLY
Answer:
Both solids and liquids have a definite volume
Explanation:
There are three states of matter which are; solids, liquids and gases.
All three states of matter have unique peculiarities. The solids have a definite shape and volume because of very strong intermoleclar forces in operation in the system.
Liquids also have a definite volume, but do not have a definite shape. They take the container's shape. However, there are less intermolecular interaction in the liquid states.
It is common to assume that gas particles do not interact. A gas does not have definite shape and volume and the weakest magnitude of intermolecuar interference.
Give three examples of unbalanced forces in your everyday life.
Answer:
weight force (i.e. the weight of something)
the force of a bat on the ball.
the force of the hair brush on hair when it is being brushed.
the force of your foot pushing on the pedal when you ride your bike.
Explanation:
One night, the power went out, so Jordan and his family lit candles. When Jordan went to bed, he checked the candles and noticed that the wax was liquid and running down the sides. When he woke up in the morning, the candles were not lit, and the wax was a solid layer around the bottom. Which statement best describes what happened to the wax? A. The liquid wax gained heat, causing it to condense into its solid form overnight. B. The liquid wax gained heat, causing it to freeze into its solid form overnight. C. The liquid wax lost heat, causing it to condense into its solid form overnight. D. The liquid wax lost heat, causing it to change phase into its solid form overnight.
Answer:
the answer is c
Explanation:
I’m confused how to do this
Answer:
B. P (Phosphorus)
Explanation:
The element is be phosphorus.
This is true because phosphorus has a larger atomic radius than carbon. If you move than the group, elements gain additional electron shell. That additional electron shell keeps electrons far from the nucleus of the atom. This actually increases the atomic radius. Also, phosphorus is more electronegative than aluminum because phosphorus itself is a non-metal and non-metals are generally electronegative while aluminum is a metal and electropositive.
Phosphorus has a lower ionization energy than argon because the ionization energy across the period (i.e from left to right) increases and across period 3, you will find phosphorus first before argon in the periodic table.
pleases helpp chemistry
Select the correct image.
ldentify the model that represents a mixture of two compounds.
Image 3 and image 6 models represent a mixture of two compounds in the attached diagram below.
What are the mixture and pure substance?Pure substances can be described as elements that cannot be further broken down into simple substances that exhibit only one type of atom in the whole composition.
A pure substance can be defined as made up of two or more elements that are chemically combined and have a set composition such kind of pure substance is known as a compound.
A mixture is constructed of two or more different substances which are only physically combined. A mixture can break down into its original components.
The chemical composition of a heterogeneous mixture is non-uniform throughout the mixture while the chemical composition of the substance in a homogeneous mixture is always uniform.
The mixture can be defined as a compound that is only physically combined not chemically. A single element is considered a pure substance, not a compound.
Learn more about mixture and a pure substance, here:
brainly.com/question/6243623
#SPJ2
Which statement describes a chemical reaction? A-Atoms in the products are rearranged to form new substances B-Atoms in the reactants are rearranged to form new substances C-atoms in the products change into new atoms to form new substances. D-atoms in the reactants change into new atoms to form new substances
Answer: B) Atoms in the reactants are rearranged to form new substances.
(B) Atoms in the reactants are rearranged to form new substances.
Here Are More Answers:
--> Which event is most likely an example of a chemical reaction?
(A) Event 1 because there is a color change.
--> Which indicator most likely suggests that a chemical change is taking place?
(B) change of color
--> Which is the most important question for deciding if a chemical reaction has occurred?
(B) Was any heat energy given off?
--> Among these processes, which is the slowest chemical reaction?
(C) tarnishing of silver
--> Which substances are the reactants?
(C) HCl and NaOH
--> Burning a piece of wood in fire can be best described as a
(C) chemical change because the atoms in wood and oxygen are rearranged.
--> A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?
(C) The solid has bubbles forming on its surface.
--> During an experiment, Mr. Lehman tells his students to be alert for signs that an endothermic reaction is happening. Which of the following scenarios would his students most likely observe?
(A) A test tube becomes cool to the touch.
--> Which statement about the two images is true?
(B) Image A shows a chemical reaction, and image B shows a physical change.
I got you. Trust The Milk.
23. A satellite moving at the same velocity in space is an example of which
law?
a. Ist
b. 2nd
C. 3rd
Answer:
A. LST
Explanation:
• 1st Law: The path of each planet around the Sun is an ellipse with the Sun at one focus.
• 2nd Law: The line from the Sun to any planet sweeps out equal areas of space in equal time intervals.
• 3rd Law: The square of the orbital period of a planet is directly proportional to the cube of the average distance
Which would have the greatest attractive force between particles?.
A)Water at 200 degrees
B)Oxygen at 54 degrees
C)Neon at 162 dgrees
D)Hydrogen at 323 degrees
I said the answer is b
.....
.
.
Imagine that you need to determine the number of grams of salt necessary to make 1.5 L of a 0.80 M NaCl solution.
Determine the number of grams of NaCl needed. Show your work.
what is the name for BrCl4
Answer:
Other names: BRCL4 MUTATIONS COPY NUMBER COMPOUND SENSITIVITY RNA INTERFERENCE GENE EXPRESSION SIMILAR CELL LINES Cell line BrCL4Explanation:
which statement describes effusion
Answer:
It occurs when a gas passes through a tiny hole.
Answer:
Effusion is a term used to describe when a gaseous molecule in a container passes or escapes through a tiny/small hole. Effusion and diffusion are two properties of gases that are often used interchangeably, however, they differ.
Explanation:
Have a great day :)
Whoever gets right I will give you Brainly
Answer:
B
Explanation:
What does towels represents on earth?
T
What type of bond is formed between the two nitrogen atoms in diatomic nitrogen, N2?
Nitrogen is a diatomic molecule in the VA family on the periodic table. Nitrogen has five valence electrons, so it needs three more valence electrons to complete its octet. A nitrogen atom can fill its octet by sharing three electrons with another nitrogen atom, forming three covalent bonds, a so-called triple bond.
I'm frosty da showman
Yami pours powdered cocoa mix into milk and stirs it. Then she microwaves the mixture for three minutes. When she takes the cup out, the handle is very warm. Steam rises from the cup, so she blows it before taking a sip. In which part of this scenario can convection be best observed?
A. stirring powdered cocoa mix into milk
B. touching the warm handle of the cup
C. rising steam from the cup of cocoa
D. pouring the cocoa mix into the milk
Answer:
The correct answer is:
C. Rising steam from the cup of cocoa.
Rising steam from the cup of cocoa is the part of this scenario that convection can be best observed.
Explanation:
Based on the nature if heat transfer by convection, convection is observed in the rising steam from the cup of cocoa.
What is convection?Convection is a process of heat transfer which involves the actual movement of the heated molecules or particles of that substance.
Convection occurs in liquids and gases.
The movement of heated molecules sets up a convection current which aids in the heat transfer.
While stirring a cup of powdered cocoa mix, convection is observed in the rising steam from the cup of cocoa.
Learn more about convection at: https://brainly.com/question/9382711
If the statement is true, select True. If it is false, select False.
Covalent bonds usually form when a nonmetal combines with a metal.
True
False
What is the name of the nuclear reaction that occurs in stars where protons combine to form larger nuclei?
Answer:
Stellar nucleosynthesis
Explanation:
6. This particle has no charge
protons
neutrons
electrons
Answer: Neutrons
Explanation: This particle has no charge
Examine the reaction equation.
CaO(s) + Al(s) → Al2O3(s) + Ca(s)
What coefficients will balance the equation?
a. 3, 2, 1, 3
b. 3, 1, 2, 3
c. 2, 1, 2, 1
d. 3, 2, 0, 3
Explanation:
The answer is A (3,2,1,3)
