Study ISLAND OLEASE HELPP
Answer:
D) Magnesium :)
Explanation:
Answer:
D. Magnesium
Explanation:
8th Grade Checkpoint 1
Which statement accurately describes the atoms of a specific element?
An iridium, Ir, atom contains 77 protons inside the nucleus and 115 neutrons outside the nucleus.
palladium, Pd, atom contains 46 electrons outside the nucleus and 45 neutrons inside the nucle
An antimony, Sb,atom contains 51 protons inside the nucleus and 51 electrons outside the nucleu
A mercury, Hg, atom contains 80 electrons and 80 protons inside the nucleus.
Answer:
Antimony, Sb, an atom contains 51 protons inside the nucleus and 51 electrons outside the nucleus.
Explanation:
Option “C” is correct because protons exist inside the nucleus and electrons exist outside the nucleus. Moreover, Sb has the number of protons 51 that is found in the nucleus and it has 51 electrons that exist outside the nucleus. However, the nucleus contains protons and neutrons while electrons exist outside of the nucleus. All the given options do not follow such condition therefore, all the statements are incorrect accept option 3rd.
A person runs 10 laps around 400m track in 20 min.calculate the runners average velocity in m/s
Explanation:
400×10=4000m
20×60=1200s
S=D÷T
S=4000÷1200
S=3.33m/s
How many moles of oxygen atoms are in 7.9E-1 moles of CO_2? Only give the numeric value of your answer. Don’t include the units.
Answer:
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ is 9.5116 × 10²³ atoms of oxygen
Explanation:
The given parameters are;
The number of moles of CO₂ = 7.9 × 10⁻¹ moles
The number of molecules of CO₂ in one mole of CO₂ = 6.02 × 10²³
The number of molecules, [tex]N_{CO_2}[/tex], of CO₂ in 7.9 × 10⁻¹ moles is given as follows;
[tex]N_{CO_2}[/tex] = 7.9 × 10⁻¹ × 6.02 × 10²³ ≈ 4.76 × 10²³ molecules
The number of atoms of oxygen in one molecule of CO₂ = 2 oxygen atoms
Therefore;
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ = 2 × 4.76 × 10²³ ≈ 9.5116 × 10²³
The number of oxygen in 7.9 × 10⁻¹ moles of CO₂ ≈ 9.5116 × 10²³ atoms of oxygen.
A _ serves as a long-term storage area for water or nutrients.
answer) reservoir
Students at Allendale High School were tardy most often for fourth hour, right after lunch. Therefore, the
administration decided to close campus for lunch. As a result, the number of students tardy for fourth hour drastically
decreased. When questioned, the principal could say that open campus lunch was a contributing factor to student
tardiness
Please select the best answer from the choices provided
T
F
There are different ways to know if a statement is true. When questioned, the principal could say that open campus lunch was a contributing factor to student tardiness is true statement.
This is because as they took away open campus for lunch that was when the tardiness for students decreased.
A statement is true if what it stand in gap for the case, Example is The buses are always early” is only true if what it describes is the case. That is, if it is actually the case that the buses are often early.
Learn more about Statement from
https://brainly.com/question/25046487
Is a substance pure or a ____________?
Answer:
Pure substance is which it consists only one type of Atom , molecule , or compound....
Explanation:
HOPE IT HELP MARK AS BRAINLIST
How might a scientist compare theories by doing an experiment?
A. Make sure that the experiment is properly controlled.
B. Do an experiment which could only apply to one of the theories.
C. Check if the experiment gives the same results when it is repeated.
D. See which theory does a better job of explaining the results of the experiment.
what mass of copper is equivalent to 0.7moles?
The study of chemicals is called chemistry.
The correct answer is [tex]1.055* 10^{-22}[/tex].
Mass is defined as the Mass is the quantity of matter in a physical body. It is also a measure of the body's inertia, the resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
The formula is used is as follows:-
[tex]= \frac{1 mole}{6.022*10^{23}} *\frac{63.546}{1mole}\\\\=1.055*10^{-22}[/tex]
Hence, the correct answer is:- [tex]1.055*10^{-22}[/tex]
For more information, refer to the link:-
https://brainly.com/question/25305623
when molecules are joined I an ordered structure
Answer:
ice
Explanation:
I will give brainliest!!!
Someone administers a toxin that disrupts ribosomal RNA (rRNA) synthesis in the cell above. Which labeled structure would be most negatively impacted by this toxin?
Choose 1 answer:
(Choice A) None of these labeled structures would be negatively impacted.
(Choice B) Structure B
(Choice C) Structure C
(Choice D) Structure D
I will give brainliest!!!
Answer:
D. Endoplasmic reticulum
Explanation:
Because Rough endoplasmic reticulum contains Ribosomes.
Which structures perform similar functions in plant and animal cells?
1. Mitochondria, nucleus, cell membrane
2. Vacuole, chloroplast, cell wall
3. Cell membrane, cell wall, nucleus
4. Ribosome, cell membrane, chloroplast
(Please answer for brainliest and a heart, thank you!)
Answer:
2
Explanation:
Sorry if Im wrong
What is the definition Reactivity
Answer: the state or power of being reactive or the degree to which a thing is reactive.
Explanation:
2. Why is acid rain of particular interest of study?
Acid rain is of particular interest to study because it demonstrates the areas of geographical locations which are highly susceptible to pollution and scientists are able to reveal some valid conclusions.
What is Acid rain?Acid rain may be defined as the type of rain that significantly contains an excess amount of acids. The rain becomes acidic because of carbon dioxide, nitrogen dioxide, and sulfur dioxide when liberated into the air as pollutants. All these liberated compounds dissolve with raindrops in order to form carbonic acid, nitric acid, and sulphuric acid respectively.
Acid rain thus formed is very harmful as it destroys organisms and other objects on which it falls. It also destroys aquatic life, soil properties, crop productivity, etc. Acid rain reacts with marble and gradually corrodes it.
The overall concentration of acid rain at a particular location illustrates its degree of pollution, impurities in the environment, etc.
Therefore, acid rain demonstrates how much an area is susceptible to pollution. It also delivers a good concept for scientists to check it.
To learn more about Acid rain, refer to the link:
https://brainly.com/question/1760060
#SPJ2
When you heat water it turns into a
gas or liquid or gas
Answer: Gas
Explanation:
A chemist compares two compounds that contain isotopes of carbon. What branch of chemistry does the chemist use?
Question options:
analytical
organic
inorganic
physical
Answer: análisis físico
Explanation:
Porque los isótpos son físicos.
Any body tell me Iron salt and water produced what
iron salts react with water to form hydrated iron ( III ) oxide which is basically rust
hope that helps :)
How many kilograms (kg) are in 6.89 pounds (lb)?
Answer:
1.4175902 kilograms
Explanation:
Answer:
3.125 kilograms is what 6.89 pounds is
Definition of organelles:
Answer:
Explanation:
A structure or part that is enclosed within its own membrane inside a cell and has a particular function. Organelles are found only in eukaryotic cells and are absent from the cells of prokaryotes such as bacteria.
Jim investigates how the angle of a throw affects the distance that the ball travels.
Assuming Jim hurls the ball with
the same force each time, what is the dependent variable in the experiment?
angle at which the ball is thrown
distance traveled by the ball
time it takes the ball to hit the ground
O force exerted on the ball
Answer:
force exerted on the ball
Explanation:
Which of these is an example of a chemical change?
A:breaking glass
B:melting ice on windshield
C:burning gasoline
D:denting a bumper
Answer:
C. burning gasoline
Explanation:
A chemical change happens when a chemical substance is TRANSFORMED into one or more different substances. In the other three examples, nothing is being chemically transformed.
How are molecules built?
Answer:
molecules can be formed by stringing carbon atoms together in a straight line or by connecting carbons together to form rings
Explanation:
molecule exists when two or more atoms join together by forming chemical bonds. ... When atoms of at least two different elements come together to form chemical bonds, these molecules can be called compounds.
Suppose you have a lead ball with a mass of 454g. What is it’s volume? (Density of lead is: 11.35 g/cm3) (show your work)
Answer:
The answer is
40 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} [/tex]
From the question
mass of lead = 454 g
density = 11.35 g/cm³
The volume of the lead is
[tex]volume = \frac{454}{11.35} [/tex]
We have the final answer as
40 mLHope this helps you
The average atomic mass of carbon is 12.01 amu. One isotope of carbon has an atomic mass of 12.00 amu
and the other major isotope of carbon has an atomic mass of 13.00 amu. Calculate the relative abundance of
each isotope.
a. P1 = 0.50 and P2 = 0.50
b. P1 = 0.99 and P2 = 0.01
c. P1 = 0.32 and P2 = 0.68
d. P1 = 0.95 and P2 = 0.05
Explanation:
please refer to the attached file
Answer:
B
Explanation:
So when you are calculating relative abundance you are actually calculating the atomic mass on the periodic table. So you are given the two isotopes of Carbon C-12 and C-13. Now you know that the atomic mass of C is 12.01 so you have to see that you have a lot more C-12 because the atomic mass is close to 12. Now you can calculate them out like this (0.99 x 12.0) +(.01 x 13.00)=12.01.
PLEASE HELP ME! I really need help coming up with a three course meal idea, I need this for chemistry, can someone help me please? I need an appetizer, a main course, and a desert. If you could find some recipes online, they don't need to be specific but do need at least five different ingredients each, that would be awesome. If you do do this, you can either list the website or type the recipe itself, I mainly need the numbers, like temperatures, amount of each ingredient, time cooking, stuff like that. I will mark whoever can do this as brainliest
appetizer - sausage w/ cheese dip
https:// www.platingsandpairings. com/sausage-bites-mustard-dipping-sauce/
Main course - Stuffed peppers
https:// www.bettycrocker. com/recipes/stuffed-peppers/63e29e18-903e-467c-aec5-fba4ce3a138f
Dessert - Lava cake
https:// sallysbakingaddiction. com/chocolate-lava-cakes/
The number behind the x is always
Answer:
being multiplied by x
Explanation:
I think,...
hope this helps :)
9.56 x 10^5 cg is how many grams?
Answer:
9.56×10¯⁷ g.
Explanation:
Mass in cg = 9.56×10¯⁵ cg
Mass in g =.?
Thus, we can convert 9.56×10¯⁵ cg to grams (g) as illustrated below:
Recall:
1 cg = 0.01 g
Therefore,
9.56×10¯⁵ cg = 9.56×10¯⁵ cg × 0.01 g / 1 cg
9.56×10¯⁵ cg = 9.56×10¯⁷ g
Therefore, 9.56×10¯⁵ cg is equivalent to 9.56×10¯⁷ g.
what is mean by scientific approach in chemistry
brief it
Answer:
scientific approach
Explanation:
Method of investigation in which a problems is First identified and observations, experiment are done
A quantity must be divided by multiples of ten when converting from a larger unit to a smaller unit.
RARE
Please select the best answer from the choices provided
T
F
Answer: true
Explanation:
Cuz I’m smart
Answer:
False
Explanation:
I just took the test.
what is the molecular activity of matter I NEED THIS ANSWERED FAST PLEASE
Answer:
Chemistry is the study of matter. Matter is made up of extremely tiny particles called atoms and molecules. Atoms and molecules make up the three common states of matter on Earth—solids, liquids, and gases. The particles of a liquid are attracted to one another, are in motion, and are able to move past one another.
Explanation:
