Answer:
9.5E22
Explanation:
(1.9/12.011)×6.02E23
Prompt
Explain how plate tectonics have changed Earth's surface over time. Include the role of plate tectonics in the creation of landforms.
Answer: The theory of plate tectonics tells us that the earth's surface sits on plates that shift due to the built up pressure underneath. When the pressure gets too much, it has to escape somewhere so it goes to the edges of the plate and causes earthquakes. This in turn causes the surface to shift.
The atomic weight of iodine is less than the atomic weight of tellurium. However, Mendeleev listed iodine after tellurium in his original periodic table because he suspected the atomic weights for these elements were inaccurate. What was Mendeleev's reason for this suspicion?
Explanation :
As we know that Mendeleev arranged the elements in horizontal rows and vertical columns of a table in order of their increasing relative atomic weights.
He placed the elements with similar nature in the same group.
According to the question, the atomic weight of iodine is less than the atomic weight of tellurium. So according to this, iodine should be placed before tellurium in Mendeleev's tables. But Mendeleev placed iodine after tellurium in his original periodic table.
However, iodine has similar chemical properties to chlorine and bromine. So, in order to make iodine queue up with chlorine and bromine in his periodic table, Mendeleev exchanged the positions of iodine and tellurium.
As we know that the positions of iodine and tellurium were reversed in Mendeleev's table because iodine has one naturally occurring isotope that is iodine-127 and tellurium isotopes are tellurium-128 and tellurium-130.
Due to high relative abundance of tellurium isotopes gives tellurium the greater relative atomic mass.
Answer the following question.
What would the total mass of a 4.9 mole sample of Barium (Ba) be if its Molar Mass is 137g?
O 132g
O 142g
O 671g
Answer:
m = 671 grams
Explanation:
Given that,
No of moles, n = 4.9
Molar mass of Barium, M = 137 g
Mass divided by molar mass is equal to no of moles. It can be given by the formula as follows :
[tex]n=\dfrac{m}{M}\\\\m=n\times M\\\\m=4.9\times 137\\\\m=671.3\ g[/tex]
or
m = 671 grams
So, the total mass of the sample of Barium is 671 grams.
Which cell structure is found in animals, but not in plants?
Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
Answer:
1
Explanation:
What do animals mean to you?
A)Lovable fur friends
B)Speacial to you
C)They are just animals
D)Who cares
Answer: OMG EMMM, PLZ ANSWER ME, I REALLY MISS U , plz come back...
Explanation:
Use the following chemical equation to answer the question:
2 K + MgBr2 ⟶ 2 KBr + Mg
Which elements or compounds are the reactants?
1. K and MgBr2
2. MgBr2 and Mg
3. KBr and Mg
4. K and KBr
Answer:
Option 1. K and MgBr2
Explanation:
From the question given above, we obtained the following data:
2K + MgBr2 —> 2KBr + Mg
In a chemical reaction, the reactants are located on the left side of the equation while the products are located on the right side.
The reactants are separated from the products by an arrow sign.
Considering the question given above,
Element /compound >>> location
K, MgBr2 >>>>>>>>>>>>> Left
KBr, Mg >>>>>>>>>>>>>> Right
From the illustration above, the reactants (i.e element/compound on the right side) are K and MgBr2
Which term is an example of a force
I believe the answer is C. Work.
Working is basically you.. well.. working, we push and pull things all the time.
Answer:
weight
Explanation:
just trust me
The expression 6.020 x 10^23
Answer:
3
Explanation:
Which of these substances is a mixture?
a: none of these are mixtures
b:Lemonade
c: gold
d: sugar
Answer:
Lemonade
Explanation:
Its a mixture of stuff to make a sweat drink :D
Explain the concept: Law of Multiple Proportions.
Answer:
The Law of Multiple Proportions explain that when two elements from a series of compounds, (replacing the two elements as A and B), the ratios of the masses of the second element that combine with 1 gram of the first element can always be reduced.
The answer the other guy gave is incorrect, and plagiarized.
My answer came from a lesson I learned.
Is there a relationship between density of an object and whether it will float sink or water in water?
Answer:
yes there is...........
Ecology is defunded as the environment study of
Answer:
sicoligy
Explanation:
this answer was wrong sorry
The mass spectrum of the element Sb is most likely represented by which of the following?
A. 122 Atomic Mass
B. 121 and 123 Atomic Mass
C. 120, 123 and 124 Atomic Mass
D. 120,121 and 124 Atomic Mass
i know the answer is b i just need an explanation
Mass spectrometry is the technique that measures the ratio of mass to charge. The spectrum of the element Sb is most likely represented by 121 and 123 atomic mass. Thus, option B is correct.
What is Mass spectrometry?Mass spectrometry plots the spectrum representing the ratio of mass-to-charge by the signals generated by the ions. The spectrum estimates the mass and isotopes of the sample elements. They also determine the chemical properties and structures.
The spectrometry detects the isotopes that are stable and are known to have the same atomic number. It can be used to determine the isotopes of an element based on their peaks generated on the mass spectrum. Antimony has two stable isotopes with atomic masses 121 and 123.
Therefore, option B. the spectrum of the element Sb is most likely represented by Sb-121 and Sb-123.
Learn more about mass spectrometry here:
https://brainly.com/question/27549121
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What is the mole fraction of sodium chloride in a solution containing 0.23 moles of NaCl and 5.5 moles of water?
Answer:
0.040
hope this helps :)
Explanation:
NaCI=mol NaCI/mol NaCI+mol H2O
NaCI=0.23 mol/0.23 mol+5.5 mol
NaCI=0.23 mol/5.73 mol=0.040
1.In class, students learned that a cart will move when a force of 50 N or greater is applied. A student pushed on the cart with a force of 10 N. The cart did not move. Why not?
2. Student A pushed on the cart with a force of 500 N. Student B pushed on the other side of the cart. The cart did not move. How much force did student B apply? Explain how you know.
3. 3. Student A pushed on the cart with a force of 400 N. Student C pushed on the other side of the cart. The cart rolled to the left. Did student C apply more, less, or the same force as student A? Explain how you know.
Yo help me this is due in 15 mins
What is one Scientific Law or Scientific Theory that affects our life?
Answer:
Does the Big Bang theory count?
Match each element with the element that is most similar to it. If you don’t know the answer, use this periodic table to help you make your best guess.
Drag the tiles to the correct boxes to complete the pairs...
Answer:
Lithium - Potassium
Carbon - Silicon
Fluorine - Bromine
Oxygen - Sulfur
Explanation:
I hope this helps!! :3
what is kwaishokor?
Answer:
Kwaishokor is a form of severe protein malnutrition characterized by edema and an enlarged liver with fattty infiltrates.
Explanation:
15. Which of the following is a correct statement?
O Nuclear power plants produce non-radioactive waste.
O Nuclear power plants utilize nuclear fusion.
O Fission utilizes the limited fuel source uranium.
O The waste products from a nuclear reactor are no longer radioactive.
Answer:
The answer is A
Explanation:
Nuclear power plants produce non-radioactive waste
Answer:
A
Explanation:
What is found in the outer region of the electron cloud
Which statement describes the most common ways in which students and professional scientists communicate the
results of their scientific research?
O Students communicate results in oral reports to the class, and professional scientists communicate results in
written reports
Students communicate results in scientific journals, and professional scientists communicate results in laboratory
reports
Students communicate results in laboratory reports, and professional scientists communicate results in scientific
journals
Students communicate results through secondary sources, and professional scientists communicate results
through primary sources.
Answer:
Students communicate results in laboratory reports, and professional scientists communicate results in scientific journals.
Explanation:
This is the answer i just did it.
I hope this helps.
Answer:
Students communicate results in laboratory reports, and professional scientists communicate results in scientific journals.
Explanation:
brainliest please
Newton’s third law of motion included which terms?
If carbon lost one proton, what atom would be formed
Answer:
boron
Explanation:
boron has 5 protons and carbon has 6, so if carbon lost a proton, it would become boron since each element has a unique number of protons.
As each element has a different number of protons, boron has five and carbon has six, so if carbon lost one of its protons, it would change into boron.
What is proton ?Every atom has a proton, a subatomic particle, in its nucleus. The particle possesses an electrical charge that is positive and opposite to the electron's.
In the reaction, a proton is forfeited. Keep in mind that when the number of protons changes, the atomic number also changes, creating a new element. Carbon-14 is the end result as a result. It is a new element, yet it has the same mass as nitrogen-14.
When carbon creates covalent bonds, pairs of electrons are shared between the atoms instead of being gained or lost as happens with chemical bonds. The ability of carbon to construct lengthy chains of atoms and so create intricate biological compounds is due in part to this feature.
Thus, If carbon lost one proton, boron atom would be formed.
To learn more about proton, follow the link;
https://brainly.com/question/1252435
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The change of matter, solid, liquid and gas is called a_________.
Answer:
This would be a phase change
Explanation:
Since the diffrent phases solid,liquid,gas are changing to other phases.
Sorry for the bad explanation.
What is the atomic number, icon, mass of potassium?
This should be EASY!
Answer:
19, K, 39.098
Explanation:
Potassium is a chemical element with symbol K and atomic number 19.
Atomic Mass: 39.098u
Which of the following is NOT part of the cell theory?
[a] all living things are made of one or more cells
[b] all cells come from existing cells
[c] cells are the basic units of structure and function in living things
[d] your brain is constantly making new cells
the answer is B) All cells come from existing cells
The point which is not a part of the cell theory is your brain is constantly making new cells.
What is cell theory?Cell theory is a scientific theory and in this theory following three basic points are mentioned:
Cells are the basic and fundamental unit of all living life.New cells are formed from the cells which are already present.All living organisms are composed of cells.So, your brain is constantly making new cells is not the part of cell theory.
To know more about cell theory, visit the below link:
https://brainly.com/question/24595992
List the common ion(s) for tungsten
Completion of the human genome map
a) during the 1800’s
b) 1990-present
c) before the 1800s
d) 1900-1988
Answer:
I think it a or c yea a or c
which terms are used to identify pure substances
Answer:
Number 2:
Element and compound