Explanation:
Energy
It is ability to do work .
There are so many forms of energy .
out of which mechanical energy is also one of the form .
Mechanical energy
It is the energy possessed by the body by virtue of its motion and state .
It is of two types :
Kinetic energy Potential energyKinetic energy
It is the energy possessed by the body by virtue of its motion .
Its expression is :
K.E=1/2mv²
Here in above question it is given that :
mass = 2Kg
V=10m/sec
K.E will be = 1/2 x 2 x 10 x 10
K.E=100 J
HCl + ca(oh)2 - - -??
2 HCl + Ca(oh)2 ---------- CaCl2+ 2 H2O
Answer:
2HCl + Ca(OH)2 -> CaCl2 + 2H2O
Explanation:
This is the balanced equation for this problem the original answer was not balanced properly
How many molecules are there in 2.3g Of carbon
Answer: 1.15x10²³ molecules C
Explanation: solution attached:
Convert mass of C to moles using its molar mass then multiply to the Avogadro's number.
What is the kinetic energy of the ball just before it hits the ground?
Answer:
1 joule
Explanation:
If you drop a softball from just above your knee, the kinetic energy of the ball just before it hits the ground is about 1 joule
Answer:
When the ball is held up, it has a lot of potential energy and no kinetic energy. As it falls, it starts losing it's potential energy and speeds up to get more kinetic energy. When it hits the floor it has no potential energy, but lots of kinetic energy.
How do you distinguish a chemical change from a physical change
Answer:
One distinguishing feature between physical and chemical changes is that a physical change can be reverse or turn back to its original form, but chemical change cannot be return to its form because the material change.
Explanation:
What is the name of the covalent compound that consists of two atoms of silicon and six atoms of bromine? What is its chemical formula?
Answer: Disilicon hexabromide ( Si2Br6 )
Explanation: First name the prefix of the first element then the prefix of the second element and change bromine to -ide.
The chemical formula of the covalent compound with 2 silicon and 6 bromine atoms has been [tex]\rm \bold{Si_2Br_6}[/tex].
The chemical formula has been the representation of the chemical compound that has been consisting of the number of atoms of each element that are present in the compound.
The chemical formula has been written with the elemental symbol, having the number of atoms of each element in the subscript.
The given covalent compound has been consisted of:
2 Silicon atoms = [tex]\rm Si_2[/tex]
6 Bromine atoms = [tex]\rm Br_6[/tex]
The chemical formula of the compound has been = [tex]\rm Si_2Br_6[/tex].
The chemical formula of the covalent compound with 2 silicon and 6 bromine atoms has been [tex]\rm \bold{Si_2Br_6}[/tex].
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At low temperatures and pressure, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions?
Answer:
It is less
Explanation:
At low temperatures and pressures, the volume of a real gas is generally smaller compared to the volume of an ideal gas under the same conditions.
This is due to the fact that real gases exhibit intermolecular interactions, such as attractive forces between the gas molecules. These interactions cause the gas particles to be closer together and occupy a smaller volume compared to an ideal gas, which assumes no intermolecular forces and occupies a larger volume.
At low temperatures, the kinetic energy of gas particles decreases, and the intermolecular forces become more significant. This leads to a reduction in the overall volume of the gas as the particles are more closely packed.
Therefore, at low temperatures and pressure, the volume of real gas is smaller than ideal gas.
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Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm^3, what is the sample’s volume
Answer:
v = 10 cm³
Explanation:
Given data:
Mass of sample = 80 g
Density of sample = 8 g/cm³
Volume of sample = ?
Solution:
We will calculate the volume by rearranging the density formula,
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
d =m/v
d = density
m =mass
v = m/d
Now we will put the values in formula,
v = 80 g / 8 g/cm³
v = 10 cm³
Solar energy received by the Earth's surface causes the Earth's surface to heat up during the day. Which of the following heat transfer mechanisms is the main cause of the surface gaining heat? A. radiation B. convection C. conduction D. advection
Answer:
radiation
Explanation:
What is the mass(g) of 9.00 moles of water?
Hey There !:
Molar mass of H₂O = 18.01 g/mol
Therefore:
1 mol H₂O ----------------- 18.01 g/mol
9.00 moles ---------------- ( mass of H₂O )
mass of H₂O = 9.00 x 18.01 / 1
mass of H₂O = 162.09 / 1
mass of H₂O = 162.09 grams
I hope that it helps !
Find the mass, in grams, of 3.758 mol CH4. ( show work )
Answer:
The mass of CH4 is 60, 29 grams.
Explanation:
We use the weight of the atoms C and H for calculate the molar mass:
Weight of CH4= weight C+ 4 x weight H= 12,01 g/mol +4 x 1,008g/mol=
Weight of CH4 =16, 042 g/mol
1molCH4-----16, 042grams
3,758 mol CH4--X= (3,758 mol CH4 x 16, 042 grams)/1 mol CH4=60,285836 grams
ireally need help
Most substances _______ in temperature and _______ when heat is added to them.
A.
decrease; contract
B.
increase; expand
C.
increase; contract
D.
decrease; expand
How many moles of O2 will be produced if you react 6 moles of KCIO3 ?
Answer:
12
Explanation:
2x6
Answer: 18 moles
Explanation:
in order to find that u need to take the coefficents of each of the compounds. that gives a ratio of 2:3.
now we find out how many each unit is: 2x = 12x = 6
now, we multiply it by 3 to find the number of moles of O23(6) = 18 mol O2.
When the fluid cools, the kinetic
energy of the inolecules decreases. This causes the
molecules to slow down and move closer together. Sines
the molecules are closer together, the density of the fluid
increases and the fluid sinks.
The kinetic energy of the molecules decreases
The molecules slow down
The molecules move closer together
The density of the fluid increases
The fluid sinks
Answer:
all of em
Explanation:
Final answer:
When a fluid cools, the density increases as molecules move closer together due to a decrease in kinetic energy, causing the fluid to sink.
Explanation:
Density of the fluid increases as the temperature decreases and molecules move closer together due to a decrease in kinetic energy, causing the fluid to sink. This phenomenon is observed in various liquids, including water, where as the temperature drops, the density of the liquid increases.
How is the earth like a gigantic recycling center
Answer: The earth is like a recycling center because as things are being used other organisms can use their waste to live.
Explanation: The cycle is cyclic allowing for the cycle to never end unless things are destroyed.
Earth is compared to a gigantic recycling center due to its natural recycling processes like the water and carbon cycles, and human-driven recycling practices. While recycling reduces environmental impact compared to using primary resources, challenges such as plastic waste remain significant, exemplifying Earth's complex role in managing and recycling its resources.
Explanation:The Earth can be likened to a gigantic recycling center due to its processes that replicate recycling. Much like a recycling center, the Earth undergoes continuous cycles of using, reusing, and disposing materials. For example, within the water cycle, water is evaporated, condensed, and precipitated repeatedly, ensuring it's continuously recycled. The carbon cycle sees carbon atoms move from atmosphere to plants, to animals, and back to the atmosphere. This demonstrates Earth's natural capacity to recycle nutrients and elements, keeping ecosystems functioning.
Beyond natural cycles, human activities also contribute to Earth's role as a recycler. Material recycling, including metal and paper, has environmental impacts but is still favorable compared to using primary resources. The energy required for recycling metals, especially aluminum, is less than that for extracting and processing the raw materials. Recycling paper saves trees, a vital resource, and maintains biodiversity. However, plastic recycling is less efficient in terms of energy and resource use, so reducing its use is preferable.
Challenges arise when the conversation turns to the sheer volume of waste humans produce, like over 300 million metric tons of plastic annually, some ending up in places like the Great Pacific Garbage Patch. Despite recycling efforts, the quest for waste management solutions persists. These facts showcase Earth's extensive recycling mechanisms, both natural and human-driven.
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The diagram below shows the structure of an animal cell.
The image of an animal cell is shown with some organelles labeled numerically from 1 to 6. The outer double layer boundary of the cell is labeled 1. A stacked disc like structure is labeled 2. A broad rod shaped structure with an irregular shape inside it is labeled 3. The entire plain section that forms the background of the cell and is within the outer boundary is labeled 4. A small circular shape within the large circular shape is labeled 5. The large central circular shape is labeled 6.
Which number label represents the mitochondria?
1
2
3
6
Answer:
3, the mitochondria has a certain shape and number 3 has the same shape.
Explanation:
Answer: It is number 3
Explanation: I am doing the test right now
Have a good day/night! :)
Describe the electrochemical series and why it’s important in understanding metals.
Answer:
The electrochemical series is an arrangement of metals in such order that any metal in the list is displaced from its compounds by any metal above it, but displaces any metal below it. The higher up the list a metal is, the greater its activity. Knowing a metal’s placement on this chart can help you understand the activity of the metal, especially in regard to its ability to displace hydrogen in acids. Any items on the list far above hydrogen will do a good job at displacing it, those near it won’t do such a good job, and those below it won’t displace it from acids at all.
Explanation:
I got this answer straight from Penn foster.
Electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
Electrochemical series has been the arrangement of the metals in the order of decreasing order of the reactivity. The arrangement has been mediated in the metals arranged above are more reactive and able to displace the lower metals in the series.
The electrochemical series has been important for understanding metals as for the reaction, the compound formed and most reactive compound has been determined easily.
Thus, electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
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What is the kinetic energy of the ball as it is half way through the fall?
Answer & Explanation:
As the ball falls towards the ground, its gravitational potential energy is transformed into kinetic energy. The kinetic energy of an object is the energy it possesses due to its motion.
When a single celled organism copies its own DNA and splits into two new daughter organisms it is called
binary fission
external reproduction
fragmentation
regeneration
Answer:
binary fission
Explanation:
What is the difference in electronegativity of each bond for both formaldehyde and ammonia?
Answer:
The chemical formula of Formaldehyde is H₂CO and the structural formula is attached below,
The chemical formula of Ammonia is NH₃ and the structural formula is attached below,
FORMALDEHYDE:
As shown in structure, there are two different types of bonds in formaldehyde,
(i) C-H Bond
(ii) C-O Bond
So the electronegativity difference of these bonds are,
(i) C-H Bond
Electronegativity of Carbon = 2.5
Electronegativity of Hydrogen = 2.1
_______
Electronegativity Difference = 0.4 (non-polar bond)
(ii) C-O Bond
Electronegativity of Oxygen = 3.5
Electronegativity of Carbon = 2.5
_______
Electronegativity Difference = 1.0 (polar bond)
AMMONIA:
As shown in structure, there is one type of bond in ammonia, and that is N-H bond
So the electronegativity difference in this bond is,
N-H Bond
Electronegativity of Nitrogen = 3.0
Electronegativity of Hydrogen = 2.1
_______
Electronegativity Difference = 0.9 (polar bond)
PLEASE ANSWER
What do all forms of electromagnetic radiation have in common?
A. Their strength in the atmosphere
B. Their frequency
C. Their wavelength
D. Their speed in a vacuum
Answer:
D. Their speed
All forms of electromagnetic radiation, regardless of their differences in frequencies and wavelengths, share the common quality of having the same speed in a vacuum, which is approximately 3.00 x 10^8 meters per second.
Explanation:All forms of electromagnetic radiation, regardless of their different frequencies or wavelengths, share one common quality: their speed in a vacuum. When traveling through a vacuum, all electromagnetic waves move at the constant speed of about 299,792 kilometres per second (or equivalently, about 186,282 miles p/s), commonly approximated as 3.00 x 10^8 meters per second. This trait applies to all kinds of electromagnetic radiation, including visible light, X-rays, microwaves, and radio waves.
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In an aqueous solution, the solute is the part of the solution that is being dissolved in water.
True or False?
The smell of hot food moves faster than the smell of cold food. Which property of gas is responsible for this? A. The kinetic energy of gas particles is higher in hot food than in cold food. B. The kinetic energy of gas particles is lower in hot food than than in cold food. C. The volume of gas molecules is higher in hot food than in cold food. D. The pressure exerted by gas molecules is higher in hot food than in cold food.
A. The kinetic energy of gas particles is higher in hot food than in cold food.
Explanation:
The smell of a hot food moves faster than the smell of a cold food because the kinetic energy of gas particles is higher in hot food than in cold food.
Let us establish that the smell of the food perceived are gases from the food.
Both hot food and cold food emits these gases that tinkers our olfactory nerves. Hot food produces a hot gas. The higher the temperature the more kinetic energy it possess. This makes the gases more dispersed and it spreads faster. The cold food produces gas at a lower kinetic energy.learn more:
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Final answer:
The smell of hot food moves faster than cold food because A. The kinetic energy of gas particles is higher in hot food than in cold food. As temperature increases, particles move faster, spreading the smell more quickly.
Explanation:
The smell of hot food moves faster than the smell of cold food because of the kinetic energy of gas particles. As the temperature of a substance increases, so does the kinetic energy of its particles. Higher kinetic energy results in particles moving faster, which facilitates quicker dispersion of the smell.
Therefore, the correct answer to this question is A. The kinetic energy of gas particles is higher in hot food than in cold food. The kinetic-molecular theory explains that an increase in temperature leads to a greater average kinetic energy of the particles. As a result, the particles in the gas move more rapidly and the scent of hot food diffuses more quickly than that of cold food.
Calculate the mass for 3 moles of ammonia.
Answer: 51g
Explanation:
n = m/M (where 'n' is the number of moles, 'm' is the mass and 'M' is the molar mass)
n = 3 moles (Given in the question)
M = 17
(This is because nitrogen has a relative mass of 4u and hydrogen has a relative mass of 1u)
We can rearrange the equation and get that
n * M = m
Therefore, 3 * 17 gives you the mass of 3 moles of ammonia
Which is 51g.
Answer: 51g
Explanation:
To solve for the mass of 3 moles of ammonia(NH3), let's get the mass of 1 mole of ammonia(NH3)
1mole of ammonia (NH3) = 14 +(3x1) = 17g.
Therefore,
3 moles of NH3 = 3 x 17 = 51g
Using the periodic table, which of the following chlorides is ionic?
Explanation:
Using the periodic table, to predict the chloride that is ionic or not, we should first understand how ionic compounds are formed.
Ionic compounds are formed between a highly electronegative element and less electronegative one.
It is usually a bond formed between metals and non-metals. Metals are on the left block and non-metals on the right block. In the formation of this bond type, a metal loses its excess electrons and becomes positively charged. A non-metal gains the electron and becomes negatively charged. The electrostatic force of attraction between the two species causes the formation of ionic bonds. Ionic bonds forms between metals and non-metals with appreciable electronegative differences.learn more:
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A doctor orders 2.0 mg of morphine. How many mL of morphine should you
administer to a patient, if a vial of morphine is 10.0 mg per 1.0 cm3?
Answer:
Morphine Sulfate 10 mg/ml solution for injection
Explanation:
Each ml of solution for injection contains 10 mg Morphine Sulfate
This medicine contains a maximum of 3.3 mg of sodium per each 1 ml ampoule.
How many grams of aluminum are needed to reacr completely with 4.5 mol of FeO
Final answer:
To react completely with 4.5 moles of FeO, 81.0 grams of aluminum are required, based on the stoichiometry of the chemical equation and the molar mass of aluminum.
Explanation:
To find out how many grams of aluminum are needed to react completely with 4.5 mol of FeO, we need to first examine the specific reaction between aluminum (Al) and iron(III) oxide (Fe₂O₃). The balanced chemical equation is:
2 Al(s) + 3 FeO(s) → 3 Fe(s) + Al₂O₃(s).
From this equation, we can deduce that 2 moles of Al are needed to completely react with 3 moles of FeO. Therefore, for 4.5 moles of FeO, the molar ratio of Al to FeO (2:3) indicates that (4.5 mol FeO) × (2 mol Al / 3 mol FeO) = 3 mol Al are required.
The molar mass of Al is 27.0 g/mol. To convert moles of Al to grams, we multiply the moles of Al needed by the molar mass of Al:
3 mol Al × 27.0 g/mol = 81.0 g Al.
Thus, 81.0 grams of aluminum are needed to react completely with 4.5 mol of FeO.
Which theory describes the motion of and force driving earth’s plates?
A. First law of motion
B. Third law of motion
C. Continental Drift
D. Plate tectonics
The theory of Plate Tectonics describes the forces and motion of Earth's plates. This theory explains the movement of the Earth's crust on a semi-fluid layer beneath, resulting in geographical phenomenon like earthquakes and mountain formations.
Explanation:The theory which describes the motion of and the forces driving the Earth's plates is D. Plate Tectonics. The Plate Tectonics theory encompasses the concept of the Earth's crust being made up of large pieces, known as plates, that float on a semi-fluid layer underneath. Over time, these plates shift, bump into each other, or even slip beneath one another, causing many of the Earth's major geographical features such as mountains, valleys, earthquakes and volcanoes. This theory has greatly contributed in our understanding of the Earth's geology, and it complements A. First Law of Motion and B. Third Law of Motion, which are principles from Physics that describe general motion and forces, not specifically Earth's plates.
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Which of these is an example of investigating an intensive property?
weighing sand in a bag
measuring the length of wire
determining if a rock is magnetic
recording the volume of water in a cylinder
Determining if a rock is magnetic is an example of investigating an intensive property.
C. determining if a rock is magnetic
Explanation:
Intensive properties don't rely upon the measure of the substance present. A few instances of serious properties are shading, taste, and dissolving point. Partitioning one broad property by another broad property, by and large, gives a concentrated worth—for instance, mass (broad) isolated by volume (broad) gives thickness (escalated). The proportion between the two broad properties is a concentrated property. For instance, mass and volume are broad properties, however, their proportion (thickness) is a concentrated property of issue.
Intensive properties are independent of the amount of substance present. The example of investigating an intensive property given is 'determining if a rock is magnetic'. This is distinguished from extensive properties, like mass, length, and volume.
Explanation:An intensive property is a property of a substance that does not depend on the amount of the substance present. They include properties like temperature, color, hardness, melting point, boiling point, pressure, molecular weight, and density. Among the examples provided, the one that involves an investigation of an intensive property is 'determining if a rock is magnetic'. Whether a rock is magnetic or not is independent of the amount of material you have.
This is contrasted with extensive properties, which do depend on the amount of the substance present. Examples of these would include mass, length, and volume—all options provided except determining if a rock is magnetic.
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PLEASE ANSWER
Based on the chart below order each of the substances according to how fast sound waves would travel through them (1 fastest- 5 slowest):
Answer: fastest through steel
Explanation:
Sound waves travel fastest through solids, basically the one with the most density.
So fastest through steel
Then Al
Then water
Then ethanol
Then air
how do you do ionic equations
Answer:
Ionic equations and net ionic equations are usually written only for reactions that occur in solution and are an attempt to show how the ions present are reacting. While ionic equations show all of the substances present in solution, a net ionic equation shows only those that are changed during the course of the reaction.
Explanation:
example: Mg + 2 HCl MgCl2 + H2