Answer:
can you aks it more clerlry
Explanation:
which element has an atom with the following composition? 24 protons, 28 neutrons and 24 electrons.
Urgent please help!!
Which of these is a chemical property of a substance?
A) texture
B) ductility
C) reactivity
D) conductivity
Answer:
reactivity
Explanation:
can you guys help me please? I dont get what im supposed to do here.
I need help with these two questions
halogens have 7
allali have 2
noble gases have 8
K = 1
P = -3
Ra= 7
Cl = -1
N = 5
O = 6
For a laboratory investigation some students put a strip of shiny metal into a beaker of blue solution and then stored the beaker on a shelf
overnight. The next morning, the students recorded observations about the metal and the solution in the box below.
Students' Observations
Exhibit
. The solution is lighter in color,
The volume of solution is the same.
• The metal strip is shiny above the surface of the solution
• The metal strip is not shiny below the surface of the solution.
• The metal strip below the surface of the solution has a dark
coat of flaky material
• When the metal strip is touched, the flaky material falls off.
Based on their observations, can the students correctly conclude that a chemical reaction occurred?
A. No, because the metal strip was still visible
B. Yes, because a new material of a different color formed on part of the metal strip
c. No, because the solution stayed blue
ble solution stayed the same
12 AM
Answer:
It is b
Explanation:
Yes, because a new material of a different color formed on part of the metal strip.
What is a Chemical reaction?When atoms establish or break chemical bonds, chemical processes take place. Reactants are substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction. Until the reactants are exhausted, some chemical reactions merely proceed in one direction. It is claimed that these responses are irreversible. Some responses are categorized as reversible. Reactions that are reversible can occur both forward and backward. Reactants change into products in a reversible reaction, but products can also change back into reactants. In actuality, both the forward response and its reverse will occur simultaneously. This oscillation lasts until a particular relative balance between reactants and products is attained a condition known as equilibrium. The forward and backward processes continue to occur at equilibrium, but there is no longer any change in the relative concentrations of products and reactants.
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Which are examples of harmful mutations? Check all that apply. One that causes a person to have a light patch of hair color one that changes a mouse's eye shape but not its eyesight O one that allows a moth to blend into its environment one that reduces a bean plant's ability to make food one that increases the plants susceptibility to disease
Answer:
one that reduces a bean plant's ability to make food
one that increases the plants susceptibility to disease
Explanation:
Genetic mutation refers to the changes in the arrangement of the bases that make up a gene. This sudden change may have positive or negative consequences for the individual specie.
Some genetic mutations actually alter a gene's sequence of bases but do not alter the function of the particular protein that the gene in question makes.
The two options chosen in the answer shows situations in which a genetic mutation causes harm to the organism involved.
Answer:
2, 4, and 5
Explanation:
PLEASE HELP 30 POINTS
Because the rock is irregularly shaped, you used the displacement method to measure its volume.
You used (______) to indirectly find the (_____) of the objects.
Options for the 1st fill in the blank:
- a balance
- calculations
- a graduated cylinder
Options for the 2nd fill in the blank:
- density
- mass
- area
Answer:
balance for the 1st and mass for the 2nd
A rectangle has a width of 7 inches height of 14 inches and a length of 12 inches find it’s volume 
Compounds are created when atoms of different elements _____.
1.form chemical bonds
2.have different chemical properties
3.form physical bonds
4.have similar chemical properties
Answer:
1.form chemical bonds
a single cell undergoes mitosis every five minutes how many cells will result from this cell in 20 minutes
Answer:
= 16 cells
Explanation:
Mitosis is the stage of cell division in nonsexual cells of eukaryotic organisms (that is, cells that have a nucleus). It takes place in several phases, begins after DNA duplication and ends with the separation of the two daughter cells.
It is a fundamental mechanism that occurs for the first time in the hours following fertilization.
After duplication of the genetic material, during interphase, it condenses and groups to form chromosomes with two genetically identical chromatids: this is the prophase. The nuclear membrane then dislocates, and the centromeres of the chromosomes (the area where the two chromatids of the same chromosome overlap) bind to the microtubules via the kinetochores. Gradually, all the chromosomes are sequestered at the equator of the cell: this is the metaphase.
Then, during anaphase, the chromosomes will split into two chromatids, each of which is pulled towards a pole of the cell. Thus, at each top of the cell, there is a copy of each chromosome. During telophase, the nuclear envelope will begin to reform around the set of chromosomes as the DNA gradually decondensed. The plasma membrane invaginates equatorially under the action of a ring of myosin and actin. Increasingly narrow, the bridge between the cells eventually breaks, and two cells are formed as a result of cytodieresis. Each of them can resume their growth.
Now; having understood what Mitosis is all about.
When a single cell undergoes mitosis every 5 minutes; we have the formation of two daughter cells.
Then in 20 minutes; we will have:
= [tex]2^{20/5}[/tex]
= [tex]2^4[/tex]
= 16 cells
Metamorphic means “________________.”
A}to turn into rock
B]to make into minerals
C]to change form
D]to press down
In Greek metamorphic means 'to change form ' . Hence the answer to this question will be ;
C) To change form
who Organized elements into four groups based on propertie
(this is 6th grade science so that’s the closet subject I could find) Do you know an adult who drinks coffee, tea, or soda pop? Think about that person and picture them in your mind. Write a description to help that person understand how they can smell their favorite beverage even though it’s a liquid.
Answer:
Well you could boil the liquid, That would make steam from the liquid. Noramlly you can smell steam.
Explanation:
What element have 5 energy levels of electrons. Which as an atom the last electron is found in the 5p^3
Answer:
I hope this answer is correct
Explanation:
Element having electronic configuration 1s
2
,2s
2
,2p
6
,3s
2
,3p
6
,3d
10
,4s
2
,4p
6
,4d
10
,5s
2
,5p
3
Scientists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.
Which property of the isotopes must be different?
a. the atomic number
b. the electric charge
c. the element name
d. the mass number
Answer:
A Mass number
Explanation:
did it on edge2020
CaCO3
How many atoms of oxygen are in one
molecule of calcium carbonate?
A 1
B3
C5
D6
Answer:
B. three atoms of oxygen
Is carbon dioxide a polar molecule? Why or Why Not?
Explanation:
Carbon dioxide isn't a polar molecule because
same nature of charge appears in opposite direction which cancel each other. So, carbon dioxide is non-polar molecule.
which is a limitation of a scientific model?
Answer:
A limitation of models in science is that they are usually simplified versions of the real situation or concept.sometimes, models spark debates leading to new and improved models.A model may be used when it is impossible to create the conditions necessary to test a concept of theory.
hope it is helpful...
There are several ways to model a compound. One type of model is shown. A central C attached to 3 C's by 1 line each, each of the 3 C's being attached to 3 H's by a 1 line each. The central C is also attached by 1 line to a C, which is attached to 2 H's and a C by a single line each. The C is attached by 2 lines to an O ad by 1 line to another O. The O with 1 line is attached by 1 line to an H. What is the chemical formula for the molecule modeled? CHO C4H11O2 C6H12O2 C6H9O
Answer:
C6H12O2
Explanation:
The first step in accurately deducing the structure/formula of the model is to count the number of carbon atoms, hydrogen atoms and oxygen atoms mentioned in the model. This gives the molecular formula of the compound.
Next, you look at there arrangement of atoms and bonds as stated in the model, this tells us the structure of the molecule and confirms the molecular formula initially deduced.
The structure of the compound is shown below.
Answer:
Your answer would be C6H12O2
Explanation: I hope I helped you :)
1. Which family of elements is most likely to lose electrons?
2. Which family of elements is most likely to gain electrons?
Answer:
Elements that are metals tend to lose electrons and become positively charged ions called cations.
Elements that are nonmetals tend to gain electrons and become negatively charged ions called anions.
Hope it helps:)
Metal are the family of elements which is most likely to lose electrons. Non metals are the family of elements which is most likely to gain electrons.
What is element?The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.
118 known elements are present. A study is being done to create element 120.1. The periodic table will have to be modified to include element 120 after it has been created and validated. Metal are the family of elements which is most likely to lose electrons.
Therefore, metal are the family of elements which is most likely to lose electrons.
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A scientist is studying the liquid shown here. She thinks the liquid is a mixture. Describe an investigation she could do to demonstrate that the liquid is in fact a combination of substances.
( please help it’s due today lol! i will mark your answer as brainliest or whatever .)
Answer: Measure the density
Explanation: pretty sure the density could identify if it is a mixture or a pure substance
Help meh, please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
volume of 200mL, density shows it weighs .789 grams for every mL. .789*200= 157.8 grams
Explanation:
anwser this ASAP please
Answer:
Its D :)
Or not i haven't done this in a while-
Calculate the maximum mass of potassium sulfate, K2SO4, that could be formed when 4.9 g of sulfuric acid reacts with excess potassium hydroxide.
H2SO4 + 2KOH → K2SO4 + 2H2O
Answer:
From 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.
Explanation:
Given data:
Mass of H₂SO₄ = 4.9 g
Mass of K₂SO₄ formed = ?
Solution:
Chemical reaction:
H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
Number of moles of H₂SO₄:
Number of moles = mass/ molar mass
Number of moles = 4.9 g/ 98.1 g/mol
Number of moles = 0.05 mol
Now we will compare the moles of H₂SO₄ with K₂SO₄ .
H₂SO₄ : K₂SO₄
1 : 1
0.05 : 0.05
Mass of K₂SO₄:
Mass = number of moles × molar mass
Mass = 0.05 mol × 174.3 g/mol
Mass = 8.715 g
Thus, from 4.9 g of sulfuric acid 8.175 g of potassium sulfate is formed.
Alien Periodic Table
Answer:
IT IS REAL
Look it up
Answer:
look close the answers are circled in blue
the answer to number 2 is element #14, Yorkel
43. Why is the geometric structure of a molecule
important, especially for biological molecules?
Answer:
A slight change can change the molecule’s usefulness to the cell.
Explanation:
What is a Physical reaction?
What is the stable end product of the decay of uranium 238
Lead
Explanation:
by emission of alpha particles
The end product of the decay of uranium 238 is Pb-206.
Heavy elements are generally grouped into four decay series which are; Thorium series, Uranium series and actinium series and Neptunium series.
These heavy elements decay via a series of α and β emissions until a stable nucleus is finally achieved. All these decay series usually terminate in a lead nucleus.
Uranium 238 belongs to the uranium decay series and terminates at Pb-206.
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What effects do mutations have? Check all that apply.
Answer:
A,C,E,F
Explanation:
Which is a characteristic of nuclear fission? releases nonradioactive waste only involves the collision of two nuclei releases small amounts of energy compared to fossil fuels involves the splitting of an atom into two or more fragments
Answer:
involves the splitting of an atom into two or more fragments
Explanation:
The characteristic of nuclear fission is that it involves the splitting of an atom into two or more fragments. Details about nuclear fission can be found below.
What is nuclear fission?Nuclear fission in radioactivity is a process by which the nucleus of a large atom splits into two or more smaller atoms.
Nuclear fission is usually accompanied by the release of a radioactive particle.
This suggests that the characteristic of nuclear fission is that it involves the splitting of an atom into two or more fragments.
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