Answer:
Frequency= [tex]\frac{speed of wave}{wavelength} =\frac{340}{2.5} =136Hz[/tex]
Explanation:
Hope this helps.
An atom can be called a particle, but a molecule is never called a particle.
Answer:
Atoms are composed of particles called protons, electrons and neutrons. ... A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. Protons and neutrons are both composed of other particles called quarks and gluons.
Particles can be atoms, molecules or ions. The term molecule is often used incorrectly to refer to any type of chemical compound. A molecule is a neutral particle made of two or more atoms bonded together. Take care with your own language, especially when referring to compounds formed during chemical reactions.
When should a lab coat, safety goggles, and gloves be worn in the laboratory?
always, no exceptions
always, unless the teacher instructs otherwise
only when the teacher says to wear them
never in chemistry labs
Answer: the answer is a
Explanation:
you should always keep lab coat on when in lab
Answer:
its A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment but your in the room you should have on protection in case of a spill or something. it is always impotent to have safety gear on. even more so in chemistry
The elements B , Si , Ge , As , all can be classified as what type of element ?
A. Noble Gases
B. Metals
C. Metalloids
D. Nonmetals
A teacher has 0.43L of 13M HCl solution and needs to dilute
it to 3.OM. How many liters of the diluted solution will be
produced?
Answer:
Initial Volume ( V₁ 0.43L
Initial Concentration (M₁) 13M
Final Concentration ( M₂) 3.0M
Final Volume ( V₂) = ?
we have to determine the final volume of diluted solution .
Using Dilution Equation
[tex] \bull\bf \: M_{1}V_{1} = M_{2}V_{2} [/tex]
Put the given value
[tex]\sf \longrightarrow \: (13 \times 0.43) = (3 \times \: V_{2} ) \\ \\ \\ \sf \longrightarrow \:(5.59) = 3V_{2} \: \\ \\ \\ \sf \longrightarrow \: \:V_{2} \: = \dfrac{5.59}{3} \\ \\ \\ \sf \longrightarrow \: \: V_{2}\: = 1.86 \: litre[/tex]
Therefore,
1.86 L of the diluted solution will produced .what would be the volume in ML
Answer:
Explanation:
720 ml
Answer:
720 ml
Explanation:
How many unpaired electrons does each element have?
Carbon : ______________________
Oxygen : ______________________
Sulfur : ________________________
Answer:
Carbon has 2 unpaired electrons
Oxygen has 2 unpaired electrons
Sulfur has 2 unpaired electrons
Explanation:
What is a characteristic of straight chained alkanes?
●They have one or more rings of carbon atoms.
●They have carbon atoms that are double-bonded to other carbon atoms. ● They have more than two carbons that are bonded to only one other carbon. ●They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Answer:
● They have more than two carbons that are bonded to only one other
Explanation:
They have carbons bonded in a single row from one end of the molecule to the other end of the molecule. ... The straight-chain alkane has two more hydrogen atoms than the cycloalkane
Answer:
D. They have carbons bonded in a single row from one end of the molecule to the other end of the molecule.
Explanation:
I got it wrong when I chose C - They have more than two carbons that are bonded to only one other carbon. So yeah p.s UNUS ANNUS
Match the correct type of energy transfer that takes place.
Answer:
Lightbulb: electrical energy to light energy
Alarm Clock: electrical energy to sound energy
Rollercoaster: electrical energy to mechanical energy
Riding a Bike: chemical energy to mechanical energy
Explanation:
Light bulbs, alarm clocks, and roller coasters require electrical energy to work. This energy then changes into the subsequent types. Light bulbs primarily emit that energy in the form of light, alarm clocks change that energy into sound, and roller coasters begin to move (mechanical). People power bikes, and the energy in our body is stored as chemical energy. So, when we rides bikes, that energy gets turned into moving (mechanical) energy.
why helium is inactive
why helium is inactive
Answer:- Outer shell of the He (1s) is completely filled with the 2 electrons He has very low intermolecular forces so it donot get liquefied even Due to complete duplet it has stable configuration so it doesn't required to react with another atoms to attain stabilityDue to high stability it is also placed among noble gases which are also called inert gasesa SOV
What is the opposite process to melting?
What is opposite process to melting?
Answer:
solidification
Explanation:
A sample of gas has a volume of 606 mL at 35 ° C. What temperature is necessary for the
gas to have a volume of 854 ml?
A 49 K
B. 707K
C 219 K
D. 434 K
Answer: 434 Kelvin
Explanation:
Assuming pressure is constant, the formula: V / T = V / T can be used.
However, all temperatures must first be converted to Kelvin by adding 273 to them:
(35 + 273) = 308K
Now, plug in: 606 / 308 = 854 / T → 1.98753T = 854 → 434 K :)
Consider the reaction in chemical equilibrium. COCl2(g) Double headed arrow. CO(g) Cl2(g) Which is the correct equation for K? Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction Upper K = StartFraction left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket EndFraction Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket EndFraction Upper K = StartFraction left-bracket Upper C Upper O right-bracket left-bracket Upper C l Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Upper C l Subscript 2 Baseline right-bracket Superscript 2 EndFraction.
The correct equation for equilibrium constant is K = [CO][Cl₂] / [COCl₂].
How we calculate the value of K?Here K is the equilibrium constant and value of K is define as the ratio of the product of the concentration of the formed products to the product of the concentration of the reactants.
Given chemical reaction is:
COCl₂(g) ⇄ CO(g) + Cl₂(g)
In the equilibrium state, equilibrium constant will be written as:
K = [CO][Cl₂] / [COCl₂]
Hence, the correct equation for the value of the equilibrium constant is K = [CO][Cl₂] / [COCl₂].
To know more about equilibrium constant, visit the below link:
https://brainly.com/question/1619133
Answer:
Explanation:
b
PLS HELP ASAP DUE AT 11:59 AND IM MARKING BRAINLIEST
PLS DO NOT ANSWER IF YOUR NOT SURE ABOUT YOUR ANSWER. this is science btw.
Answer:
In the followings below, the one that doesn't attract to magnets is:
Option 4, Aluminum.
Explanation:
Mainly because of the aluminum's crystal structure.
Hope this helped you out! ^^
#CarryOnLearning
Answer:
Aluminum
Explanation:
Ferromagnetic Metals
Ferromagnetic metals and alloys are the only magnetic metals. Out of all of the elements on the periodic table, there are only 3 metals that are attracted to magnets: iron, nickel, cobalt.
Aluminum
Aluminum is a nonferrous metal (meaning not including iron or steel) that does not include any ferromagnetic metals. Additionally, aluminum itself is not magnetic, so there is no attraction between aluminum and a magnet.
Assume that each finch comes from a large population of similar finches in its particular environment. Imagine a drought in the environment of Finch 1 makes the small seeds they normally feed off of scarce. Describe how natural selection could cause the population of finches in the first group to evolve over time to resemble the population of Finch 2.
By the process of natural selection, individuals in Finch 1 will evolve over time to resemble individuals in Finch 2.
What is natural selection?Natural selection is the process by which individuals who possess certain features or structures that make them better suited to their environment are able to survive and reproduce in their environment while those who do not have such features die off.
Since the preferred food for Finch 1 has become scarce due to drought, individuals in Finch 1 who have features that enable them eat larger seed will be naturally selected for survival , most population in Finch will be composed of such individuals.
Therefore, natural selection will cause individuals in Finch 1 to evolve over time to resemble individuals in Finch 2.
Learn more about natural selection at: https://brainly.com/question/14485249
What was the original meaning of the term oxidation.
Answer:
reaction with oxygen
Explanation:
The term oxidation was originally used to describe reactions in which an element combines with oxygen.
A gas at STP occupies 16 L of space. If the pressure changes to 2.6 atm and the temperature increases to 195 degrees C, what is the new volume? Show your work.
I WILL MARK YOU BRAINLIEST! PLEASE HELP!
The new volume of a gas at STP that occupies 16L of space is 27.43L.
HOW TO CALCULATE VOLUME?The volume of a given gas can be calculated using the following expression:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = final volumeT1 = initial temperatureT2 = final temperature1 × 16/273 = 2.6 × V2/468
16/273 = 2.6V2/468
0.0586 × 468 = 2.6V2
V2 = 27.43
Therefore, the new volume of a gas at STP that occupies 16L of space is 27.43L.
Learn more about volume at: https://brainly.com/question/1578538
Answers please
I will give brainliest
Answer: it is group1 or group 3 on god
Explanation:
describe how a pure dry sample of solid lead carbonate can be obtained from sodium carbonate solution and lead nitrate solution
Answer:
Soluble salts can be made by reacting acids with soluble or insoluble reactants. Titration must be used if the reactants are soluble. Insoluble salts are made by precipitation reactions.
Making insoluble salts
An insoluble salt can be prepared by reacting two suitable solutions together to form a precipitate.
Determining suitable solutions
All nitrates and all sodium salts are soluble. This means a given precipitate XY can be produced by mixing together solutions of:
X nitrate
sodium Y
For example, to prepare a precipitate of calcium carbonate:
X = calcium and Y = carbonate
mix calcium nitrate solution and sodium carbonate solution together
calcium nitrate + sodium carbonate → sodium nitrate + calcium carbonate
Ca(NO3)2(aq) + Na2CO3(aq) → 2NaNO3(aq) + CaCO3(s)
It also works if potassium carbonate solution or ammonium carbonate solution is used instead of sodium carbonate solution. Remember that all common potassium and ammonium salts are soluble.
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Explanation:
Mix lead nitrate and sodium carbonate solutions, forming lead carbonate precipitate, filter, wash, and dry.
To obtain a pure dry sample of solid lead carbonate (PbCO₃), follow these steps:
Prepare Solutions: Dissolve lead nitrate (Pb(NO₃)₂) in water to make a lead nitrate solution, and dissolve sodium carbonate (Na₂CO₃) in a separate container to make a sodium carbonate solution.
Mixing Solutions: Slowly add the sodium carbonate solution to the lead nitrate solution, drop by drop, while stirring. A white precipitate of lead carbonate will form.
Precipitate Formation: Pb(NO₃)₂(aq) + Na₂CO₃(aq) → PbCO₃(s) + 2NaNO₃(aq)
Filtration: Carefully filter the mixture to separate the solid lead carbonate precipitate from the remaining solution (filtrate).
Washing: Wash the precipitate with distilled water to remove any remaining soluble impurities.
Drying: Place the wet lead carbonate precipitate on a filter paper and let it air dry or use an oven at a low temperature. Once completely dry, a pure sample of solid lead carbonate is obtained.
This process ensures the separation of lead carbonate from the solutions and other compounds, yielding a dry and pure sample of the desired compound.
To learn more about sodium carbonate solutions here
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60 points please help me!
HNO3(aq)+H2S(s)> Ss)+ NO(g)+H2O(l)
Answer: Nitric acid + Hydrogen disulfide
Explanation: To balance HNO3 + H2S = NO + S + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Nitric acid + Hydrogen disulfide .
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
Which of the following is the most violent of all solar disturbances?
a
solar winds
b
sunspots
c
prominence's
d
solar flares
How can magnets store energy?
What best explains why the moon's surface gravity is only one-sixth of Earth's surface gravity?
A) Earth is closer to the Sun, so it has much more gravity.
B) Gravity is controlled by the tides, which are much closer to Earth than the moon.
C) The moon orbits Earth faster than Earth orbits the Sun, giving the moon less gravity.
D) Gravity is the result of an object's mass and size; the Earth is much larger than the moon.
Answer:
D) part is the correct answer
Answer:The answer is D
Explanation:The moon is a bit more than one-fourth (27 percent) the size of Earth, a much larger ratio (1:4) than any other planets and their moons. Earth's moon is the fifth largest moon in the solar system. The moon's mean radius is 1,079.6 miles (1,737.5 kilometers).
20 Points! A student takes a beaker with distilled water and dissolves 30.0 grams of salt into the beaker of water. He realizes he forgot to measure the mass of the water before-hand! The end mass of the beaker with salt water is 851.0 grams and the empty beaker originally has a mass of 412.0 grams. What is the mass of the distilled water?
Answer:
409.0 grams
Explanation:
total mass-(mass of salt+mass og empty beaker)
Answer:
442
Explanation:
og empty beaker + salt
What is a substance that is made up of only atoms of one type?
Answer:
Element
Explanation:
All matter is made up of very small particles called atoms. Atoms are the building blocks of all matter. When a substance contains only one type of atom, it is called an element.
Give the names of any two synthetic indicators.
Two common synthetic indicators are
Methyl red PhenophthaleinThe indicators are used to check whether the solution is basic or acidic
ANSWER PLS!!!!!!!!!!!
Is there a different way to balance a synthesis, decomposition, single displacement and double displacement reactions or is it all the same
Answer:
This is the reverse of a synthesis reaction. Replacement reactions occur when elements switch places in compounds. In a single replacement reaction, one element takes the place of another in a single compound. In a double replacement reaction, two compounds exchange elements
The nucleus or center area of the atom contains two kinds of subatomic particles. Which two?
protons and neutrons
protons and electrons
electrons and neutrons
protons only
Answer:
protons and neutrons
Explanation:
HURRY PLEASE I NEED HELP ASAP. WILL GIVE 20 POINTSSSS.
Give a reason why it might be important to know Newton’s second law in the real world.
Answer:
Newton's Second Law states that an object's acceleration depends on the net force upon the object, as well as the object's mass.
So, a real world example of this would be pushing a vehicle out of a ditch. If your vehicle is a motorcycle, with a relatively small mass, then you don't need to apply much force on it, as compared to if the vehicle were a pickup truck, with a large mass, which would require much more force applied to move it out of the ditch.
I hope this helps! Feel free to give me Brainliest if you feel this helped. :)
Answer:
One reason why it could be important is hitting a ball. if the ball is heavy it will be harder to hit it far than if its light.
Why do males and females have sezual relationships?
Answer:
1) There are people who want a child
2) There are people who are idiots and do it for fun.
Explanation:
It's simple I guess. lol
Answer:
All animals and living things need to reproduce to keep their species alive
Explanation:
Like the other person commented, some people want to have kids, and others do it for fun LOL.
Btw,
With other species, the animals that DO reproduce are the ones that are most likely to survive, like a green bird in a heavily forested environment would survive, while a pink bird wont. This helps protect their species and ensure that the "most likely to survive", reproduces, so their offspring also are most likely to survive!
:)