Answer:
neutrons, protons
Explanation:
Answer:
Option A
Option B
Explanation:
It isn't option D because electrons are on the outside of the nucleus of the atom, and it isn't option C because isotopes are usually the same elements but with different amounts of neutrons while having the same number of protons. Leaving options A and B or "neutrons and protons" as your answer and that's because neutrons and protons are always found in the center of the nucleus which also helps determine the element.
Hope this helps.
a serving of cheese its releases 130kcal when digested. if this energy was transferred to 2.5kg of water at 27 degrees celsius, what would the final temperature be?
The final temperature : 79.07°C
Further explanationHeat transferred can be formulated
Q=m.c.ΔT
Q= heat, J
m=mass,g
c=specific heat, for water 4.18 J/g C
ΔT = temperature
Heat transferred : 130 kcal
1 kcal = 4186 J
130 kcal =
[tex]\tt 130\times 4186=544180~J[/tex]
mass = 2.5 kg =2500 g
t₁=27 °c
The final temperature :
[tex]\tt 544180=2500\times 4.18\times (t_2-27)\\\\t_2-27=52.07\\\\t_2=79.07^oC[/tex]
What determines the ratio of ions in an ionic compound? answers on screenshot
Answer:
B
Explanation:
For ionic compounds, the charge on the ions is the determinant of the ratio of ions in an ionic compound.
For instance, let us consider the ionic substance Al2O3, the charge on Al^3+ is +3 and the charge on O^2-is -2. This automatically implies that the ratio of ions in the compound is 3:2.
During exchange of valencies, the compound is now written as Al2O3.
In an ionic compound, the ratio of the ions has been based on the ratio of the charge. Thus option B is correct.
Ionic compounds are formed by the transfer of electrons between the anionic and cationic species. The formed compound has the transfer of a number of electrons, based on the charge.
Thus, with the ionic compounds, the ratio to the ions has been assigned based on the ratio to the charge of the ions.
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Identifying Characteristics of Atoms
Number of
Protons
Number of
Neutrons
Atomic
Number
Mass
Number
Element
(symbol)
А
7
B
15
С
D
E
26
56
F
Using the periodic table, complete the table to describe each atom. Type in your answers,
А
00
С
F
Explanation:
The number of protons in an atom is the atomic number.
Mass number is the number of protons plus neutrons in an atom.
Mass number = number of protons + number of neutrons
Atomic number = number of protons
Atomic number gives the symbol of the element
Number Number Atomic Mass Symbol
Protons neutrons Number Number
A 7 B 15 C
D E 26 56 F
A, number of protons = B
Mass number = protons + neutrons
15 = protons + 7
Protons = 15 - 7 = 8
Atomic number 8 is for oxygen = C
Atomic number = number of protons = D = 26
Number of neutrons ;
E = Neutrons = mass number - protons = 56 - 26 = 30
Atomic number 26 is for Iron = F
Name the following Compound: FeCl2
How are molecules arranged inside solid, gas and liquids
Answer:
Solid= all together in lines
Gas= floating round everywhere
Liquids = a lot more than gas but not all together like solid
Why is it useful to group elements based on the way they behave in chemical reactions?
The elements in a group often look and behave similarly, because they have the same number of electrons in their outermost shell — the face they show to the world. Group 18 elements, on the far right side of the table, for example, have completely full outer shells and rarely participate in chemical reactions.
Have a nice day
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, for the easing the understanding of elements grouping of elements is done based on the way they behave in chemical reactions.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Grouping elements based on the way they behave in chemical reactions makes the study of elements in the periodic table much easier and comfortable.
Therefore, for the easing the understanding of elements grouping of elements is done based on the way they behave in chemical reactions.
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PLEASE HELP ASAPP!!!!!!!!!!!!!!!!!!!!!!!! TIMED TEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!A man pushes a box with a force of 75.0 N across a 12.0 m loading dock. How much work did he do on the box? (Use formula W = F x d)
Answer:
Answer:
Work done, W = 900 joules
Explanation:
It is given that,
Force acting on the man, F = 75 N
Distance, d = 12 m
We need to find the work done by the man on the box. Let it is given by W. The work done of an object is equal to the product of force and distance. Mathematically, it can be calculated as :
W = F × d
W=75\ N\times 12\ mW=75 N×12 m
W = 900 joules
So, the work done by the man on the box is 900 joules. Hence, this is the required solution.
hope it is helpful
HELP
how are the strength of a covalent bond, it’s bond length, and its bond disassociation energy related?
WILL GIVE BRAINLIEST
Bond length is related to bond order: when more electrons participate in bond formation the bond is shorter. Bond length is also inversely related to bond strength and the bond dissociation energy: all other factors being equal, a stronger bond will be shorter.
ERGENT!!!!!!!!!!!: A runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running. [1 Calorie = 4.184 kJ] Which of the following statements is TRUE? (Select ALL that apply) *
A. There were 3,140 kJ of energy in the snack.
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
D. During her run, she used 189 Calories of energy.
E. The runner used fewer Calories while running than she consumed during her snack.
F. The runner used more Calories while running than she consumed during her snack.
Answer:
B. There were 1,570 kJ of energy in the snack.
C. During her run, she used 755 Calories of energy.
F. The runner used more Calories while running than she consumed during her snack.
Explanation:
According to this question, a runner eats a snack with 375 Calories of nutritional energy. After her snack, she burns 3,160 kJ while running.
Since 1 Calorie = 4.184 kJ, it means that the runner consumed 375 × 4.184 = 1570 kJ of energy. In other words, THERE WERE 1,570 kJ OF ENERGY IN THE SNACK.
Also, the runner burns 3,160 kJ while running meaning that she equivalently burnt 3160/4.184 = 755.258 calories. Approximately, 755 calories of energy were burnt by the runner while running.
In a nutshell, the runner consumed 375 calories of energy in her snack but used up 755 calories while running. This means that the runner used more Calories while running than she consumed during her snack.
Help plz:))) I’ll mark u brainliest
ASAP!!!
I need help so bad!
This water bottle has a mass of 0.5 kg.
CU
If the net force acting on the bottle is 5 N to the right, what is the bottle's
acceleration?
(Hint: Use the formula a = =)
A. a = 10 m/s2 left
B. a = 50 m/s2 right
c. a = 10 m/s2 right
D. a = 2 m/s2 left
PLEASE ANSWER I WILL GIVE BRAINLYEST
Answer: the answer is a=10m/s^2 right
Explanation: it just make more since then the other answers .
Answer:
c 10
Explanation:
ape.x verified
It is difficult to burn a heap of green leaves but dry leaves catch fire easily.
Explain.
Answer:
i dont really have explaining but see green leaf have some amount of water and chlorophyll so it doesn't get burnt and dry leaves lose water and have no amount of them so they get burnt
HOPe It WiLl HeLp........how many grams of molecular oxygen (O2) is produced from 13.8 grams of calcium chlorate (Ca(ClO3)2)in the following chemical reaction?Ca(ClO3)2→CaCl2+ 3O2
Answer:
6.72 g
Explanation:
Given data:
Mass of calcium chlorate = 13.8 g
Mass of oxygen produced = ?
Solution:
Chemical equation:
Ca(ClO₃)₂ → CaCl₂ + 3O₂
Number of moles of calcium chlorate:
Number of moles = mass / molar mass
Number of moles = 13.8 g/ 206.98 g/mol
Number of moles = 0.07 mol
Now we will compare the moles of oxygen and calcium chlorate.
Ca(ClO₃)₂ : O₂
1 : 3
0.07 : 3×0.07=0.21 mol
Mass of oxygen:
Mass = number of moles × molar mass
Mass = 0.21 mol × 32 g/mol
Mass = 6.72 g
In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom. Which statement below describes what happened? a A physical change occurred, a gas and precipitate was produced b A physical change occurred, only a gas was produced c A chemical change occurred, only a gas was produced d A chemical change occurred, a gas and precipitate was produced
Answer:
A chemical change occurred, a gas and precipitate was produced
Explanation:
From the question , we are informed of science lab, where Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom.
In this case the change that took place is chemical change ( is one where new product are formed after two substance react) the bubbles that is produced signify the presence of gas in the product, white solid formed is reffered to as a precipitate( which is reffered to as solid that is been formed from a particular solution).
Which phrase describes a plateau?
low elevation
surface cut by streams
rounded or sharp peaks
gradual slopes on all sides
It’s not rounded or sharp peaks pls help
Answer:
The answer is surface cut by streams.
Explanation:
I just took the quiz and got a 100%
The best phrase that described plateau is "surface cut by streams".
What is a plateau?A plateau is a tableland, consisting of an area of a highland made of flat terrain that is raised sharply above the surrounding area on at least one side.
Many plateau are topped with a hard, durable surface called caprock, which protects the plateau from erosion.
Valleys form when river water cuts through the plateau.
Thus, the best phrase that described plateau is "surface cut by streams".
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is Sc2S3 polar or non polar or ionic
Answer: Ionic
Explanation:
Monique habal francès; es
Answer:
pls make the question clear
Explanation:
List 3 elements that have similar properties or reactivity. Justify your answer with reasoning.
Answer:
Lithium, Potassium and Calcium
Explanation:
Because they are all in group one of the periodic table
Fill in the coefficients that will balance the following reaction:
_Ca + _CO2 + _O2 → _CaCO3
Answer:
2Ca+3CO2+1O2 -> 2CaCO3
which is more dense hot magma or cool magma?
Answer:
Your answer is hot magma.
Explanation:
Hot magma has more density than cool magma.
Would outer space be an ideal spot for a concert? Why or why not? List, write, or draw your response.
Answer:
No.
Explanation:
Outer space would not be an ideal spot for a concert for many reasons. One of which, is that there is no sound in space. On Earth, sound travels through air molecules. In outer space there are no air molecules for the sound vibrations to bounce off of.
For many reasons, holding a concert in outer space would not be a good idea. One of them is that sound does not exist in space. Sound moves through air molecules on Earth. There are no air molecules for the sound waves to bounce off of in space.
What is called outer space?The term outer space is defined as the region beyond a planet's atmosphere. It has far few molecules, with lots of empty space between them so, it's called as outer space.
The sound travels through the vibration of particles, and space is a vacuum. On Earth, sound mostly travels to our ears by way of vibrating air molecules, but in near-empty regions of space there are no particles to vibrate therefore, there is no sound.
Thus, Sound moves through air molecules on Earth. There are no air molecules for the sound waves to bounce off of in space.
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18 points Which identifies an oxidation-reduction reaction?
a double replacement reaction
a neutralization reaction
a reaction in which oxidation numbers change
a reaction in which no electrons are transferred
Answer:
a reaction in which oxidation numbers change
Explanation:
here you go happy to help
The _______ of a substance is the amount of that substance that can dissolve in a certain amount of a given solvent.
115 N
165 N
The box above has a mass of 10 kg. At what rate will
the box accelerate when acted upon by the forces
above?
Answer:
unclear what your question is
Explanation:
forces cannot be equal, the box will not move, the box cannot weigh more than the force being pushed upon it if the force pushing on the box has more force, then the box will movw
The diagram below shows earth as viewed from space as it moves around the sun approximately how long does it take earth to move from position a to position b?
A. 6 months
B.12 hours
C. 1 year
D. 1 day
Answer:
It would take 12 hours.
Explanation:
It takes 24 hours to move from point A back to it's position. So if it goes half way you divide by two and you get 12. So it would be B.
The diagram shows half of earth's one revolution. Earth takes one year or 365 days for revaluation around sun. Thus for one half revolution, it takes 6 months.
What is earth's revolution?All planets in the solar system revolves around earth by different time periods. Earth revolves around sun along with the the rotation on its own axis. Earth takes 24 hours for its one complete rotation and it 365 days or one year for one complete revolution.
The different seasons are created in earth because of the revolution around earth and the difference in the distance from the sun at various points of revolution. One revolution means earth starting from a point A and returns to the point A.
In the given diagram the distance A to B is half of the distance for A to A again. Thus, for the half revolution, earth takes 6 months. Thus, option A is correct.
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Is MG an ion, isotope, or neutral atom?
Answer:
isotope
isotope
isotope
isotope
isotope
isotope
isotope
isotope
isotope
During the process of photosynthesis, green implants produce
a. sunlight
b. methane
c.nitrogen
d. sugar
HELP PLS !! Hypothesis:
Before you begin, predict how many compounds you can make from the elements below. Pick one element from the metal list and two from the nonmetal list.
For example, "If I use sodium, hydrogen, and oxygen, then I can make ten new compounds in five minutes."
Now, you try! Make a prediction. Be sure to record your prediction on your lab report.
Metal
• Sodium (Na)
• Calcium (Ca)
Nonmetal
• Hydrogen (H)
• Oxygen (O)
• Carbon (C)
• Chlorine (Cl)
Answer:
thanks remember thats what you said to me c:
Explanation:
Which air is driest? Group of answer choices Air Temp 30F Dew-point 29F Air Temp 50F Dew-point 36F Air Temp 77F Dew-point 19F Air Temp 66F Dew-point 60F
Answer:
C. Air Temp 77F Dew-point 19F
Explanation:
The further the separation between the temperature and the dew-point allows for a drier object.
Dew point is the temperature needed by the air to be cooled. The driest air will be at the higher dew point and temperature hence, at air temperature of 66F and dew point of 60 F.
What is dew point?Assuming constant air pressure and water content, the dew point is the temperature at which air must be cooled to become saturated with water vapor.
Moisture capacity decreases below the dew point, and airborne water vapor condenses to produce liquid water, or dew. Dew will develop on the surface when this happens through contact with a cooler surface.
The dew point is known as the frost point when the temperature is below the freezing point of water because frost is formed by deposition rather than condensation.
The humidity has an impact on the dew point. The dew point rises when there is more moisture in the atmosphere. Therefore, the higher dew point means less humid the air is or more dry. Hence option d is correct.
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AYO DONT BE SHY, HALP
What type of severe weather forms from rapidly rotating columns of air that reach down from thunderstorms to the ground?
Drought
Flood
Hurricane
Tornado
Answer:
D) Tornado
Explanation:
Tornadoes are rapidly rotating columns of air that reach down from thunderstorms to the ground. They occur when funnel clouds (made of water droplets, dust, and debris) touch the ground. Tornadoes produce violent winds up to 500 kilometers per hour (300 miles per hour) and can last up to 15 minutes. If a tornado occurs over a lake or ocean, it produces a water spout.
