Answer:
P₂ = 50 mmHg
Explanation:
Given data:
Initial volume of gas = 80 mL
Initial pressure of gas = 100 mmHg
Final volume = 160 mL
Final pressure = ?
Temperature = constant
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
100 mmHg × 80 mL = P₂ × 160 mL
P₂ = 8000 mmHg. mL/ 160 mL
P₂ = 50 mmHg
Based on the organization and colors in the periodic table, which two elements do you think are most similar in terms of their properties magnesium (Mg) , barium (Ba) , and gold (Au) ? Explain .
Answer:
Magnesium and barium
Explanation:
They are both Alkaline earth metals. All the alkaline earth metals react with water to produce hydrogen gas and the metal hydroxide, although somewhat less vigorously than the alkali metals.
The organization and colors in the periodic table magnesium and barium are the two element with most of the similar properties because they both belongs to alkaline earth metals.
What are periodic table?
Periodic table are defined as an arrangement of all the elements known to man in accordance with their increasing atomic properties and recurring chemical properties. 118 elements are arranged in periodic table.
Alkaline earth metals are defined as any of the divalent strongly basic metal of group 2 of a periodic table comprising beryllium, magnesium, calcium, barium and radium.
Thus, the organization and colors in the periodic table magnesium and barium are the two element with most of the similar properties because they both belongs to alkaline earth metals.
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A solution is classified as a weak base. Which of these could be the pH of the solution?
A)2
B)6
C)10
D)13
C
Pure water is at 7, and the bases are above 7 and the acids are below 7.
The pH of the solution that is classified as a weak base is 10. Details about weak bases can be found below.
What is pH?pH of a solution refers to the degree of acidity or alkalinity of that solution.
The pH scale reads from 1 - 14 where the following applies:
1 - 6 represents acidic solution7 represents neutral8 - 14 represents alkaline solutionA weak base will have a pH close to neutral, therefore, the pH of the solution that is classified as a weak base is 10.
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Please help!!! I don’t know
Answer:
4.06×10^23
Explanation:
1 mole has 6.023×10^23 molecules
0.675 moles have (6.023×10^23×0.675) molecules
When a car takes a sharp turn to the left and the person in the car slides to the right, this
is an example of
A. Newton's First Law of Motion
B. Newton's Second Law of Motion
C. Newton's Third Law of Motion
D. Newton's Law of Gravity
Answer:
It is newtons First Law:)
Explanation:
why elements are arranged according to atomic number rather than atomic mass in the periodic table
Answer:
hope it helps...
Explanation:
Atomic Number as the Basis for the Periodic Law
Assuming there were errors in atomic masses, Mendeleev placed certain elements not in order of increasing atomic mass so that they could fit into the proper groups (similar elements have similar properties) of his periodic table.
Why are yeast cells used in making bread?
Answer:
Yeast is used for the leavening of bread. Yeast uses the sugars and oxygen in dough to produce more yeast cells and carbon dioxide gas. The carbon dioxide makes the dough rise which gives the bread a light and spongy texture. Yeast also works on the gluten network.
Explanation:
Classify the following as a solution, suspension or colloid
(a) Brine
(b) milk
(c) sand and water
(d) soda
(e) air
(f) smoke
(g) chalk and water
Answer:
Solution - (a) Brine . Suspension - (c) sand and water, (g) chalk and water Colloid - (e) air, (f) smoke , (d) soda , (b) milk
Explanation:
A solution is an homogeneous mixture of two or more compounds.
A suspension is a heterogeneous mixture of two or more compounds while a colloid is a homogeneous mixture of two or more compounds with suspended particles which do not settle.
So, under these definitions, the classifications are as follows-
Solution - (a) Brine .
Suspension - (c) sand and water, (g) chalk and water
Colloid - (e) air, (f) smoke , (d) soda , (b) milk
A car travels 300 miles in 5 hours. How long does it take for the car to travel 82 miles?
Answer:
5 hours is 300 minutes so it goes 1 mile per minute. So 82 minutes = 1 hour and 22 minutes.
Explanation:
So if the car goes 1 mile every minute to reach 82 miles you have to
1 x 82 = 82 minutes converted into hourse = 1 hour and 22 minutes :)
why do you think neutrons are necessary in the nucleus of an atom?
Answer:
They help stablize the strucure of an atom.
Explanation:
Take into consider isotopes where there are more or less than the ideal amount of neurtrons. These isotopes are radioactive and unstable to the point hey are used as atomic bombs. So with the proper amount of nuetrons it helps the atom maintain structure and not degrade
Answer: they have an important role to keep the atom stable
Explanation:
since protons are positively charged, there is an incredibly strong repulsive force between all the protons in a nucleus
what type of friction is talking
Answer:
does friction talks ? friction is a oppossing force tho
What is the temperature range for ammonium nitrate crystals and a pouch of water?
Answer:
its cold
Explanation:
85miles/hours south is an example of? this is science btw
Answer:
I believe it's an example of velocity
Explanation:
This is because 85miles/hour south is giving both magnitude (85miles/hour) and direction (south)
A student prepared this table to gather information about digestion. Digestion of Food Column A Column B Physical Changes Chemical Changes The results of which investigation would be entered in Column A of the table? A. How do mitochondria release the energy in food molecules? B. Which type of teeth are most important in crushing food? C. What chemicals in the stomach are most important in breaking down proteins? D How do substances released by the pancreas affect the rate of digestion?
Answer:
B. Which type of teeth are most important in crushing food?
Explanation:
According to the question physical changes ought to be entered into column A while chemical changes ought to be entered into column B.
The crushing of food is a physical change. It does not involve any chemical transformation of the food material.The other options involve some sort of chemical transformation taking place on the food material being digested.
which element will chemically combine with fluorine to form a salt?
a. carbon
b. lithium
c. neon
d. oxygen
I just need help plz!
_______ is the process of using a specific material to speed up a chemical reaction, leaving the material unchanged at the end of the reaction.
Answer:
Catalyse
Note that I'M NOT A SCIENCE TEACHER! I MIGHT BE INCORRECT, DOUBLE CHECK YOUR ANSWER!
Stay safe and Merry Christmas! :)
Answer:
Catalyse
Explanation:
Catalysis is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst.
Top answer is most likely true
PLEASE HELP.
how many grams of K2SO4 are in 1.18x10^24 atoms?
Answer:
Mass = 331.17 g
Explanation:
Given data:
Mass in gram = ?
Number of atoms of K₂SO₄ = 1.18 × 10²⁴ atoms
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
1.18 × 10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.19× 10¹ mol
1.9 mol
Mass of K₂SO₄:
Mass = number of moles × molar mass
Mass = 1.9 mol × 174.3 g/mol
Mass = 331.17 g
What state (solid, liquid, gas) is mercury in at the boiling point of water, 100°C? Explain.
Mercury is in a liquid state
Mercury's melting point is somewhere around -34 Degrees Celcius. Thus it should be assumed it will be a liquid at this temperature. Not a gas however as mercury's boiling point is somewhere in the 600 Degree range
According to Kepler’s 3rd law of motion, which planet will have the shortest orbital period?
A). Jupiter
B). Mercury
C). Earth
D). Saturn
Answer:
B: Mercury
Explanation:
Yuh
who is good at chemistry?! HMU asap!!!
how elements are arranged in the groups of periodic table
Answer:
Explanation:
The chemical elements are arranged in order of increasing atomic number. The horizontal rows are called periods and the vertical columns are called groups. Elements in the same group have similar chemical properties. This is because they have the same number of outer electrons and the same valency.
Question
Review the electron configurations of the elements in period 3, from sodium (Na) to argon (Ar). What do you observe?
Select the correct answer.
The electron configuration for chlorine does not follow the pattern of the other elements in period 3.
After the 3s sublevel is filled with two electrons, each additional electron goes into the 3p sublevel.
O After the 3p sublevel is filled with six electrons, each additional electron goes into the 3s sublevel.
The electron configuration of magnesium does not follow the pattern of the other elements in period 3.
Submit
Part B
us 12
Answer:
B-After the 3s sublevel is filled with two electrons, each additional electron goes into the 3p sublevel.
Explanation:
Edmentum
what is the name of the covalent compound N5Cl8
Answer:
Did you put that in right because i've never heard of a compound called that nor is there a compound called that on the internet
Explanation:
You must of put that in wrong
2. Water is an example of a(n)
a. inorganic b. organic
compound.
d. none of these
c. carbon
it would be A ,inorganic Compound
which graph above best represents the relationship between the volume and the pressure of a gas?
The graph (A) best represents the relationship between the volume and the pressure of a gas.
What is pressure?The force was applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The relationship between pressure and volume can be understand with the aid of ideal gas law.
PV=nRT.
where, P is pressure, V is volume.
It can be seen that when temperature will kept constant then pressure will be inversely proportional to the volume. It can be shown as:
P ∝ 1/V.
Therefore, graph A represent relationship between pressure (P) and volume (V).
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A consequence of burning fossil fuels is
warming.
Which elements from the periodic table are the least reactive?
A noble gases
B transition metals
C lanthanides
Dmetalloids
Answer:
Noble games are the least reactive because their outer shells are already full with 8 electrons.
What happens to most of the radiant energy that is not converted to thermal energy?
a. It is used in photosynthesis.
b. It is reflected into space.
c. It is converted to electricity.
d. none of the above
Identify Which two types of subatomic particles are located in the nucleus?
Answer:
protons and neutrons
Explanation:
How many oxygen atoms are in 5 moles of water H2O molecules?
Answer:
I think 20
Explanation:
Becu of science
In testing for the presence of lead 2+ ions in solution, a student addes a
solution of sodium nitrate. What will be the conclusion of the test if no
precipitate forms? *