Answer: the last one:)
Explanation: energy cannot be destroyed but can be transfered
(called energy transfer).
which element has the lowest atomic mass?
Answer:
Hydrogen
Explanation:
Hydrogen has only 1 proton and has an atomic mass of 1. It does not have neutrons. Helium and above have higher mass than Hydrogen.
According to the electronic configuration, element with lowest atomic mass is hydrogen.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
Learn more about electronic configuration,here:
https://brainly.com/question/29157546
#SPJ6
So far, he spent 3 hours reading the first 165 pages. If Kamal continues to read at the same rate, how many more minutes will he need to finish the 198-page book?
Answer:
36 minutes
Explanation:
You take 165/3= 55 pages per hour.
Take 198-165 = 33 pages left of the book
Take 33/55 = .6 hrs to finish the book.
Take 60(minutes in an hour)*.6= 36 minutes
Why does the copper(I) ion Cu+ have 10 3d electrons?
Please check my chem answers! Due in a few minutes!
Answer:
their correct
Explanation:
your answers are correct
Which is more dense, dish soap or corn syrup?
Answer:
Corn syrup has 1.33 and dish soap has 1.06 so its corn syrup
saftey goggles are worn in the lab-
Answer:
Yes
Explanation:
Is this a question or what?
Answer:
this is true and should always be true
Explanation:
if they are not on in the lab you or others may get injured
carbon dioxide is a compound why
Answer: CO2 is a type of compound because it consists of multiple elements such as oxygen and carbon.
Answer:
Carbon dioxide is a compound because it contain more than one type of elements, carbon and oxygen, which are chemically bonded.
help me plz, ASAP . (25 points)
Answer:
what is the question
Explanation:
Noble gases share which characteristics? Check all that apply A.) they all have one free electron in their outer shell B.) they’re considered transition elements C.) they don’t react with other elements D.) they’re inert
Mutations are changes in the genes of living things. Mutations are common in all life forms and usually harmless. In fact, sometimes they help organisms survive. However, people often think that the word mutation means something dangerous. Which best describes the question "Why do most people think mutations are dangerous?" a scientific question, because it asks about mutations that happen in nature a scientific question, because it asks about most people instead of just a few not a scientific question, because it asks about what people think instead of how nature works not a scientific question, because it asks about how mutations can be helpful to life in nature (ANSWER IT FIRST AND GET BRAINLIST)
Answer: A
Explanation:
Answer:
C
Explanation:
Write and balance this equation. Solid iron reacts with fluorine gas to produce crystalline iron(III) fluoride.
Answer:
iron+flourine.............iron flouride
Fe+F2.............FeF3
the above reaction is not balanced
now to balance this reaction
2Fe+3F2...........2FeF3
now this reaction is balanced
The balanced equation is: 2Fe + 3F2 ⇒ 2FeF3
How to balance an equation?A chemical equation needs to be balanced if you want to make the wide variety of the atoms of the reactants equal to the variety of the atoms of the goods.
Given,
Iron + fluorine ⇒ Iron Flouride
Fe + F2 ⇒ FeF3
Now to balance this reaction:
2Fe + 3F2 ⇒ 2FeF3
This reaction is balanced.
What is iron fluoride used for?
This medicine is a mixture manufactured from nutrients, iron, and fluoride. it's miles utilized in infants and youngsters to deal with or prevent deficiency because of terrible weight loss programs or low tiers of fluoride in drinking water and other sources.
Learn more about iron fluoride here: brainly.com/question/24072912
#SPJ2
Why is being under the band of stability a problem?
Answer:
Because that indicates that something is not stable. (im pretty sure that's the reason. Im not fully sure. Good question!)
Explanation:
How did the atom model change
Answer:
Neil's Bohr improved Rutherford's model.
Explanation: I hope this helps! :)
A liquid has a density of 0.70g/ml. Find the mass of the liquid which can be put
into a beaker holding 130mL.
Answer:
The answer is
91 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density of liquid = 0.70 g/mL
volume = 130 mL
The mass is
mass = 0.7 × 130
We have the final answer as
91 gHope this helps you
A 20 N net force acts on an object with a mass of 2.0 kg. What is the object's acceleration? (PLS HELP lol)
Explanation:
Force = Mass × Acceleration
20 = 2.0 × A
A = 20/2 = 10m/s^2
Based on what you know about conductivity and the periodic table, rank the elements in order from most conductive to least conductive.
Answer: chromium, germanium, iodine
Explanation:
Answer:
Chromium, Germanium, Iodine
Explanation:
edge
2. What was the primary reason in the 1850's driving the curiosity of atoms?
1905-Einstein
1827-Brown
The primary reason that large numbers of people left Ireland in the 1840s and 1850s was MASS STARVATION.
Great Famine or Great Hunger was a period in Ireland where mass starvation, diseases, and emigration occurred between 1845 to 1852.
The Great Famine was caused by Phytophthora infestans, a disease that infests in potatoes. Though the potato infestation spread throughout Europe, it greatly affected Ireland, where 1/3 of its population was dependent on the potato crop as their primary source of food.
The loss of their primary source of food led to mass starvation, sickness, and eventual death. Others opted to leave Ireland and seek shelter and food in other countries to survive.
Identify the substance oxidized and the substance reduced in the following chemical equation:zn(s)+AgNO3(aq)=Zn(No3)2+2Ag(a)
Answer:
Explanation:
zn is oxidized because its oxidation number is increased from zero in zn to +2 in zn(No3)2
Ag is reduced because its oxidation number is reduced from +1 in AgNo3 to zero in Ag
oxidation number of zn(s) is zero while the oxidation number of zn in zn(No3)2 is
zn(No3)2=x+(5*2)+(-2*6)=x+10-12=x-2
x-2+2=2
x=2
the oxidation of Ag in AgNo3
AgNo3=x+5+(3*-2)=x+5-6=x-1
x-1+1=1
x=1 while the oxidation number of Ag is zero
so zinc is oxidized and silver (Ag) is reduced
ANSWER QUICKLY PLEASE!!!
Explain how electron microscopes work and why some scientists might prefer to use electron microscopes instead of light microscopes.
Answer:
Electron microscopes differ from light microscopes in that they produce an image of a specimen by using a beam of electrons rather than a beam of light. Electrons have much a shorter wavelength than visible light, and this allows electron microscopes to produce higher-resolution images than standard light microscopes.
Explanation:
What does weight measure?
A: Quantity of matter in an object
B: How much space an object takes up
C: Force of gravity acting on an object
D: How long it takes for an event to occur
Is the equation above balanced or unbalanced? Explain? Worth 55 points.
Answer:
For me, it is balanced
Explanation:
Because the amount of element Zn reaction is equal the production. Also as the amount of Hydrogen and Chloride in the reaction and the production are equal.
(1 kilometer = 1,000 meters, 1 hour = 60 minutes, 1 minute = 60 seconds) Complete the steps necessary to convert 55 kilometers per hour to meters per second. Min 60 1,000 15.28 100 sec
Explanation:
55 kilometers per hour to meters per second
First we have to convert the kilometers to grams;
1 kilometer = 1,000 meters
This means we have;
55000 meters per hour
Converting hour to seconds;
1 hour = 60 minutes
1 minute = 60 seconds
1 hour = 60 * 60 = 3600 seconds
We divide 55000 by 3600;
55000 / 3600 = 15.28 meters per second
Explanation:
55 kilometers per hour to meters per second
First we have to convert the kilometers to grams;
1 kilometer = 1,000 meters
This means we have;
55000 meters per hour
Converting hour to seconds;
1 hour = 60 minutes
1 minute = 60 seconds
1 hour = 60 * 60 = 3600 seconds
We divide 55000 by 3600;
55000 / 3600 = 15.28 meters per second
Which sentence correctly uses parallel structure? The boss wants to know who can take the late shift tonight, open tomorrow morning, and who can work on the holiday. The boss wants to know who wants the late shift tonight, who can open tomorrow morning, and if you will work on the holiday. The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday. The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and which of us wants to work on the holiday.
Answer:
C) The boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday.
Explanation:
The sentence that has been in the parallel structure has been the boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.
The parallel structure can be defined as the continuous repetition of the grammatical form in the sentence. The parallel structure has been able to provide equal importance to the tasks in the sentence.
In the given sentence, the varying task has been late shifts, open tomorrow, and work on holidays. The grammatical form of who can has been able to give equal importance to every task with the repetition.
Thus, boss wants to know who can take the late shift tonight, who can open tomorrow morning, and who can work on the holiday has been in parallel structure. Thus, option C is correct.
For more information about the parallel structure, refer to the link:
https://brainly.com/question/8055410
40 ponitsss!! How many orbitals are in each of the following?
_______ 3p sublevel _______ 5d sublevel
_______ 2s sublevel _______ 3rd principal energy level
_______ 4f sublevel _______ 5th principal energy level
An orbital is a region in space where there is a high probability of finding an electron.
In an atom there are orbitals. Orbitals are mathematical probability functions that describe regions in space where an electron could be found according to the wave mechanical model of the atom.
In the 3p sublevel, there are three orbitals. In the 2s sublevel, there is only one orbital. In the 4f sublevel, there are seven orbitals. In the 5d sublevel, there are five orbitals. In the third principal level, there are three nine orbitals in the fifth energy level, there are 25 orbitals. Note that in principal level, there are n^2 orbitals where n is the principal energy level.
Learn more: https://brainly.com/question/2286339
23°C = ______ K
-250
296
123
23
Answer:
296
Explanation:
Tk = ºC + 273
Tk = 23 + 273
T = 296 K
Please help! If a forensic chemist discovers evidence through examination which would prove a person guilty of a crime, why then might this person not be convicted?
Explanation: You cannot be convicted of a crime without evidence. You cannot be convicted of a state crime. You cannot be convicted of a federal crime. If there is no evidence against you, under the law, it simply is not possible for the prosecutor's office to obtain a conviction at trial. So, when you do have evidence it is really impossible to not get convicted unless the judge truly believes your side of the story and declares you not guilty.
I hope this helped :) If not i'm sorry!
Which of the following is NOT true of a chemical change?
A. Chemical bonds are broken
B. The identity of a substance has
changed
C. The substance has only
changed form or appearance
D. It can be indicated by the
presence of bubbles or rust
An unknown Element X is discovered. Element X is found to have varying numbers
of valence electrons and has a high melting point. Which group does Element X most
likely belong to?
Transition Metals
Halogens
Alkali Metals
Noble Gases
A six row combin harvests 266 pounds of corn per min. How many bushels of corn does it harvest per hour? (Note: 1 Bu = 56 Lbs) Round to the nearest Whole Number.
Answer:
The six-row combin harvests 285 bushels of corn per hour.
Explanation:
The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them. That is, what is intended with it is to find the fourth term of a proportion knowing the other three.
If the relationship between the magnitudes is direct, you can apply the following formula:
a ⇒ b
c ⇒ x
So: [tex]x=\frac{a*b}{c}[/tex]
In this case you can apply it in the following way: if 56 pounds is equal to 1 bushel, 266 pounds to how many bushels is it?
[tex]x=\frac{266 pounds*1 bushel}{56 pounds}[/tex]
x=4.75
This is, a six row combin harvests 4.75 bushels of corn per min.
So, being 1 hour equal to 60 minutes, you can apply the following rule of three: if in 1 minute a six-row harvester harvests , in 60 minutes how many bushels of corn it harvests?
[tex]bushels of corn=\frac{60 minutes*4.75 bushels of corn}{1minute}[/tex]
bushels of corn= 285
The six-row combin harvests 285 bushels of corn per hour.
What is Polymerase Chain Reaction?
Answer:
Polymerase Chain reaction is a method used by scientists to making A LOT (millions to billions) of copies of a DNA sample which then allows scientists to take a small of that DNA and increase the amount to a very large amount to study the DNA into further detail.
Polymerase Chain Reaction (PCR)
Polymerase chain reaction (PCR) is a technique for replicating or copying a specific portion of a DNA strand; leads to millions of copies of the DNA segment technique for replicating or copying a specific portion of a DNA strand; leads to millions of copies of the DNA segment.