Answer:
C. sorry if I'm wrong ...................
Please help. A 208 g sample of sodium-24 decays. How much of this radioactive isotope will remain after 3 half
lifes?
Answer: The information about sequential order of the event occurred in the past can be obtained by using only relative dating method.
Explanation:
Relative dating method doesn’t give information about when it happened. It provides sequential order of the events. It is the art of deciding the overall happening of past occasions (i.e., the age of an item in contrast with another), without fundamentally deciding their outright age (for example evaluated age).
In topography, shake or shallow stores, fossils and lithologies can be utilized to correspond one stratigraphic segment with another.
Phosphorus reacts with oxygen to form diphosphorus pentoxide: 4 P(s) 5 O 2(g) ---> 2 P 2O 5(s) If 0.97 moles of phosphorus are reacted how many moles of P 2O 5 are produced
4P(s)+5O2(g)-->2P2O5(s)
4 moles of P=2moles of P2O5
0.97 moles of P=(2*0.97)/4
=0.485 moles
Which of the following best describes the cell below
plant cell
Protist cell
Eukaryotic cell
Prokaryotic cell
Answer:
Prokaryotic cell
Explanation:
If you search it up you will see that the prokaryotic cell looks exactly alike with the picture you have posted.
Which of the following are needed to calculate the percent yield? Select all that apply. Question 10 options: Theoretical yield Actual yield Excess yield Limiting yield
Both theoretical and actual yields would be needed to calculate percent yield.
The percent yield of a reaction is defined as the ratio of the actual yield to that of the theoretical yield. It can be mathematically expressed as:
percent yield = actual yield/theoretical yield x 100%
The actual yield is the amount of a specific product produced from a reaction while the theoretical yield is the stoichiometric amount of the same product.
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diagram 1 above shows equimolar samples of two gases inside a container fitted with a removable barrier placed so that each gas occupies the same volume. the barrier is carefully removed as the temperature is held constant. diagram 2 above shows the gases soon after the barrier is removed. which statement describes the changes to the initial pressure of each gas and the final partial pressure of each gas in the mixture and also indicates the final total pressure?
This problem is describing the state two gases have when separated and together as shown on the attached picture. First of all, diagram 1 shows how they are separated in two containers with apparently equal volumes, whereas diagram 2 shows the removal of the barrier so that they get mixed together.
In this case, we can analyze that each gas has its own pressure and due to the removal of the barrier, both pressure and volume undergo a change. Thus, we can infer that the final volume is doubled with respected to the initial one for each gas, causing the pressure of each gas to be halved and the total pressure the half of the added ones, in agreement to the Boyle's law (inversely proportional relationship between pressure and temperature).
Therefore, the correct choice is:
C. The partial pressure of each gas in the mixture is half its initial pressure; the final total pressure is half the sum of the initial pressures of the two gases.
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https://brainly.com/question/21184611Joe the scientist wants to figure out if the weight of a bowling ball will affect how fast it rolls down a ramp. Joe builds a 15 foot long ramp that is 5 feet tall at the top. Joe believes that if he rolls the 6 pound bowling ball from the top of the ramp, then it will roll the fastest. Joe then gets several bowling balls that are identical except for their weight. The different weights are 6 pounds, 8 pounds, 10 pounds, 12 pounds, and 14 pounds. Joe starts by placing the 6 pound ball at the top of the ramp and he starts the timer at the same time he lets go. He stops the timer when the ball reaches the bottom of the ramp. Joe repeats this process for all of the bowling balls. Joe repeats this process for all of the bowling balls.
What’s the IV, DV, hypothesis and constant ?
Answer:
IV: The weight of the ball
DV: Time it takes for the ball to roll from top to bottom
Hypothesis: 6 pound bowling ball from the top of the ramp, then it will roll the fastest.
Constant: I dont know
Explanation:
When iodine is added to foods with no starches it turns
Answer:
Add Iodine-KI reagent to a solution or directly on a potato or other materials such as bread, crackers, or flour. A blue-black color results if starch is present. If starch amylose is not present, then the color will stay orange or yellow
what is an environmental result from burning fossil fuels?
Answer:
The burning of fossil fuels contributes to the addition of greenhouse gases to the atmosphere. These gases trap thermal energy in the Earth's atmosphere.
what general statements can you make about the relationship between the color of a solution and the color of light it absorbs?
The color absorbed is the complementary color to the color we perceive.
The color absorbed by an object and the color we perceive are complementary. All objects that we see have different colors. The color we see is always opposite to the color absorbed by the object in the color wheel.
Hence, the color wheel can be used to show the relationship between the color perceived and the color absorbed by the object. The color absorbed is the complementary color to the color we perceive.
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When particles in a solid or liquid move faster they move slightly further apart, what is this called?
When particles in a solid or liquid move faster they move slightly further
apart and is referred to as Elastic collision
Liquids and gases possess more kinetic energy than solids which is why
there is movement of its atoms in a system. Gas have the highest kinetic
energy and solids have the lowest. When the atoms move ,they collide with
one another which pushes the particles further apart.
The atoms in liquid and gas exhibit vibrational(rotational) motion which brings about movement and collision of the particles.
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In what respect does 3s sub-Shell differ from 4s sub-shell?
Answer:
in the energy and in the principal quantum number (n)
Explanation:
the energy of 3s sub-shell is less than 4s sub-shell
and the principal quantum number of 3s sub-shell (n)= 3 but the principal quantum number of 4s sub-shell (n) = 4
fork is a metal or nonmetal ?
Type the correct answer in each box to complete the table. Use numerals instead of words.
Determine the least common multiple of the charges for each combination of elements in the table. Ignore the plus (+) and minus (−) signs of the charges and just enter numerals. The first row is completed for you.
The least common multiple of the charges for each combination of elements in the table. Ignoring the plus (+) and minus (−) signs of the charges and just entering the numerals. The table is complete as follows.
chlorine(Cl) oxygen(O) nitrogen(N)
Lithium(Li) 1 2 3
magnesium(Mg) 2 1 3
aluminium(Al) 3 2 1
How charged species formed?The charged species formed by losing and gaining of an electrons from an atoms and which called ions.If an atoms lose one and more an electrons then positive charged species formed called cation. If an atoms gain one and more an electrons then positive charged species formed called an anion.To learn more about charged species here.
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Answer: the first one is incorrect
Explanation:
What is the pressure in millimeters of mercury inside a container of gas.
is it difficult or easy to obtain hydro power
Answer:yes
Explanation:
cause yes
Answer please
........................................
Answer:
The answer would be:
C. Potassium and magnesium
Explanation:
because the only have valence electrons
how long do fresh cranberries last in the refrigerator?
Answer:
Three to four weeks
Explanation: I had cranberries and In like four weeks my mom forced me to get rid of them. They do stink when rotten ;(
type the max number of electrons that can be present in each shell or sub below
n = 5 shell __
n = 2 shell __
n = 2 l = 0 sub: __
n = 2 / 1 sub: __
3d sub: __
2s sub: __
5f sub: __
Explanation:
The maximum no. of electrons in a shell is given by. 2n^2 .
So for
n= 5 , 2× 5× 5 = 50
n=2 , 2×2×2 = 8
For a sub shell the maximum no. of electrons possible is given by 2(2l + 1)
So for n= l= 0
2 [(2×0) +1] = 2
for n=2 l=1
2 [(2×1) + 1] = 6
3d
d sub shell has l= 2 quantum number
Therefore 2[ (2×2) + 1] = 10
2s
s sub shell has l=0 quantum number
2 [(2×0) +1] = 2
5f
f sub energy level has l=3 quantum number
So 2[ (2×3) +1 ] = 14
The azimuthal quantum numbers for the sub shells are as follows
( s ---> 0
p----> 1
d----> 2
f ----> 3 )
what is Java ‽‽‽‽
[tex] \: [/tex]
Answer:
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
Explanation:
what is the context of that questing ?
just by itself 3 main answers :
an island
coffee from that island
a programming language
why does reducing solute particle size increase the speed at which the solute dissolves in water .
Because it has less surface area. This can be applied to something like cooking potatoes. Cooking a larger potato will take longer than a small potato.
ignore q above 6 NO LINKS and please answer all question 6-9 and parts
Where is the question?
When 50 cm³ of hydrocarbon Y is burnt, it reacts with exactly 300 cm³ of oxygen to form 200 cm³ of carbon dioxide. Water is also formed in the reaction. Deduce the equation for this reaction. Explain your reasoning.
Answer:
C2H4 + 3O2---> 2CO2 + 2H2O
Explanation:
The volume of the gas is directly proportional to the no. of moles of the gas at constant temperature and pressure.
So Volume of O2 : Volume of CO2 = 300: 200
= 3:2
So we can add 3 and 2 stoichiometric coefficients to O2 and CO2 respectively.
Then we can see that out of total 3×2 atoms of O, 2×2 atoms of O have been incorporated into CO2. Therefore the remaining 2 O should be in the H2O ( during complete combustion of hydrocarbon we get CO2 and H2O as products)
So we can add 2 in front of H2O..
Then calculate the total no. of C and H atoms in the products side to find the no. of C and H atoms in the hydrocarbon.
C=2
H=4
So the hydrocarbon burnt has the formula C2H4.
To solve such this we must know the concept of combustion reaction. Therefore, The balanced chemical reaction will be
C[tex]_2[/tex]H[tex]_4[/tex]+ 3O[tex]_2[/tex][tex]\rightarrow[/tex] 2CO[tex]_2[/tex] + 2H[tex]_2[/tex]O
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water.
At constant temperature and pressure, the number of moles of the gas directly relates to the volume of the gas.
Volume of O[tex]_2[/tex]: Volume of CO[tex]_2[/tex]
= 300: 200
= 3:2
The chemical reaction will be
C[tex]_2[/tex]H[tex]_4[/tex]+ 3O[tex]_2[/tex][tex]\rightarrow[/tex] 2CO[tex]_2[/tex] + 2H[tex]_2[/tex]O
Therefore, the chemical reaction will be
C[tex]_2[/tex]H[tex]_4[/tex]+ 3O[tex]_2[/tex][tex]\rightarrow[/tex] 2CO[tex]_2[/tex] + 2H[tex]_2[/tex]O
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what is the total number of valence electrons in ethyl acetate?
Answer: There are 36 valence electrons.
Explanation:
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the valence electrons of C₄H₈O₂ is 32.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
A valence electron is a negatively charged particle, located in the outermost shell of an atom, that can be transferred to or shared with another atom. To calculate total valence electrons in C₄H₈O₂, we need to add the individual valence electrons of each element.
Valence electrons of C₄H₈O₂= {valence electrons of C×4}+{valence electrons of H×4}+{valence electrons of O×2}
Valence electrons of C₄H₈O₂= {4×4}+{1×4}+{6×2}
Valence electrons of C₄H₈O₂=32
Therefore, the valence electrons of C₄H₈O₂ is 32.
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How does a phase change from solid to liquid occur in a substance?(1 point)
Answer:
As heat is added to solid water, the temperature increases until it reaches 0 °C, the melting point. At this point, the phase change, added heat goes into changing the state from a solid to liquid. Only when this phase change is complete, the temperature can increase.
hope this helps
Heat is responsible for the change of phase from solid to liquid state.
A phase change from solid to liquid occur in a substance by heating of that substance because the bonds present between solid particles can be broken down with the help of heat energy.
When the bond is heat at the temperature on which it is broken down, the solid particles are converted into liquid substance so we can conclude that heat is responsible for the change of phase from solid to liquid state.
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When bacon is cooked, a solid fatty residue remains in the pan after cooling. What can be said about the fat in bacon based on this observation
Answer:
The fatty acids are mostly saturated.
Explanation:
what element is 1s2 2s2 2p3
In a few minutes, you will work with your partner to create three dances—one for each of the three phases. Each dance will represent the molecular freedom of movement of that particular phase.
If needed, navigate back to My Work to refer to your homework from Lesson 1.4. Then, begin brainstorming ideas for movements that would show these phases.
Dance ideas for solids:
Dance ideas for liquids:
Dance ideas for gases:
under the same conditions of temperature and pressure how does a liquid differ from a gas
Briefly explain the importance of ATP and its role in a cell.
Answer:
n energy-carrying molecule found in all living things' cells. ATP absorbs chemical energy from the breakdown of food molecules and uses it to power other cellular processes.
Explanation:
Hope it helps
ATP is a crucial energy molecule in cells, providing energy for various cellular processes.
ATP, or adenosine triphosphate, is often referred to as the "energy currency" of the cell. It plays a vital role in cellular metabolism by providing energy for various processes. ATP is composed of adenosine and three phosphate groups. The energy stored in ATP is released when the terminal phosphate group is hydrolyzed, forming ADP (adenosine diphosphate) and inorganic phosphate (Pi).
The role of ATP in a cell is multifaceted. Firstly, ATP powers cellular work by providing the energy needed for chemical reactions, such as biosynthesis, active transport, and muscle contraction. It acts as an immediate source of energy that can be rapidly used by the cell.
Secondly, ATP participates in signal transduction and cellular communication. It can be hydrolyzed to ADP and Pi, releasing energy that can activate signaling molecules and enzymes involved in cell signaling pathways.
Furthermore, ATP is involved in maintaining cell homeostasis. It provides energy for processes like ion pumps that maintain the electrochemical gradients across the cell membrane, allowing cells to regulate their internal environment.
Overall, ATP is crucial for the functioning of cells as it serves as an energy carrier, facilitating energy transfer and powering various cellular processes essential for growth, metabolism, and cell survival.
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4,756 rounded to nearest thousand
Answer:
5,000
Explanation:
When rounding to the thousands place, you look at the digit in the hundreds place, if the digit is less than 5 you round down. For example if the number was "4,456," we would round to "4,000." But, since the digit in the hundreds place is 7, which is greater than 4, you round up to "5,000."