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
New account if u added my account antonio716 this my new account new friends
how did u even find me again i wanna see if people are
me with a wey some one made
Answer:ok
Explanation:
Pb+feSO4 - pbSO4 + fe
Lead + Iron(II) Sulfate = Lead Sulfate + Iron
Lead - Pb
Plumbum Element 82 Bulk Lead 鉛 Lead (native) Lead-210 Pb-210 210Pb
Iron(II) Sulfate - FeSO4
Iron Sulfate (1:1) Iron(II) Sulfate (1:1) Ferrous Sulfate (anhydrous) Ferrous Sulfate Ferrous Sulfate (anh.) Iron(2+) Sulfate (anh.) FeSO4 Fe(II)SO4
Lead Sulfate - PbSO4
Anglesite
iron - Fe
Element 26 Fer 26Fe Eisen Ferrum Hierro Ferrum Metallicum 鐵
A mole is blank objects
Answer:
Well what I found was that this was this answer
Explanation:
A mole is 6.022 x 1023 objects of any kind - atoms, electrons, molecules, cars, people, etc... . It is known as Avogadro's number after the scientist who discovered ... Blah blah I think you get it.
i’ll give brainliest just please help me out with the answers haha thanks <3
Answer:
i dont see tha pic
Explanation:
N2 + 3H2 Right arrow. 2NH3 What is the percent yield of NH3 if the reaction of 26.3 g of H2 produces 79.0 g of NH3? Use Percent yield equals StartFraction actual yield over theoretical yield EndFraction times 100..
Answer:
53.4%
Explanation:
N₂ + 3H₂ → 2NH₃
Given that:
26.3 g of H₂ react with N₂ to produce 79.0 g of NH₃
Then:
The number of moles of H₂ = 26.3g of H₂ * (1 mol of H₂/ 2.02g of H₂)
= 13.05 mol of H₂
The number of moles of NH₃ = 13.05 mol of H₂ * ( 2mol of NH₃/ 3 mol of H₂)
= 8.697 mol of NH₃
The mass of NH₃ = 8.697 mol of NH₃ *( 17.04g of NH₃/ 1 mol of NH₃) = 148.1 g of NH₃
The percent yield = actual yield/ theoretical yield * 100%
The percent yield = ( 79.0 g/ 148.1 g )* 100%
The percent yield ≅ 53.4 %
Answer:
53.4
Explanation:
NEED ASAP!!!
Sound energy travels by electromagnetic radiation.
True
False
false
Explanation:
..................................................................
Which Group 2A element would you expect to be the most reactive?
beryllium (Be)
calcium (Ca)
barium (Ba)
radium (Ra)
Answer:
Calcium
Explanation:
It has the largest atom
What is the frequency of a particular type of electromagnetic
radiation with a wavelength of 5.00 x 10-8 m?|
Answer:
f = 0.6× 10¹⁶ Hz
Explanation:
Given data:
Wavelength of radiation = 5.00 × 10⁻⁸ m
Frequency of radiation = ?
Solution:
Formula:
Speed of light = wavelength × frequency
speed of light = 3 × 10⁸m/s
Now we will put he values in formula.
3 × 10⁸m/s = 5.00 × 10⁻⁸ m × f
f = 3 × 10⁸m/s / 5.00 × 10⁻⁸ m
f = 0.6× 10¹⁶ s⁻¹
s⁻¹ = Hz
f = 0.6× 10¹⁶ Hz
The smallest particle of an element that retains the properties of that element is a(n) ____. a. atom c. proton b. electron d. neutron
Answer: proton
Explanation:
They are what give an atom it’s identity
Water has a higher boiling point than expected because what?
Answer:
Water has strong hydrogen bonds between molecules. These bonds require a lot of energy before they will break. This leads to water having a higher boiling point than if there were only weaker dipole-dipole forces. Water also has a high specific heat.
Explanation:
Hope this helped it is what I could find!
Answer: Water has a higher boiling point than expected because hydrogen and oxygen form single covalent bonds. Molecules of water is bound together by strong attractions which needs high energy to break resulting to a higher boiling point of water than most substances.
Explanation: Water has strong hydrogen bonds between molecules. These bonds require a lot of energy before they will break. This leads to water having a higher boiling point than if there were only weaker dipole-dipole forces. Water also has a high specific heat.
How many days does it take for 16 g of palladium-103 to decay to 1.0 g? The half-life of palladium-103 is 17 days.
Answer: It will take 68 days for the palladium to decay.
Explanation: ima smart dude
is Sc2S3 polar or non polar or ionic
Answer: Ionic
Explanation:
What do the results tell you about your hypothesis(es)? How do the data support your claim above?
Answer: It tells you if your hyposthesis was incorrect or correct from the data. The data supports this because you tested and got your results correctly which will help you to form a hypothesis.
Explanation:
Answer:
It tells you if your hyposthesis was incorrect or correct from the data. The data supports this because you tested and got your results correctly which will help you to form a hypothesis.
Explanation: its right trust me
Which is the more energetic, a red photon or a blue photon? Explain in terms of frequency and wavelength.
Answer:
Shorter waves vibrate at higher frequencies and have higher energies. Red light has a frequency of around 430 terahertz, while blue's frequency is closer to 750 terahertz. Red photons of light carry about 1.8 electron volts (eV) of energy, while each blue photon transmits about 3.1 eV.
Im so sorry if this isnt what you are looking for :(
Happy if it is :3
How can the shape of a molecule determine its polarity.
Answer:
Letter D
Explanation:
How could a synthetic material such as Acegram affect society?
Explanation:
Synthetic fiber or synthetic fibre (in British English; see spelling differences) are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers. In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. Synthetic fibers are created by a process known as polymerization, which involves combining monomers to make a long chain or polymer. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer). There are two types of polymerization: linear polymerization and cross-linked polymerization.
Synthetic material are madeup of monomers and long chain of monomers are known as polymers. The process is known as polymerization and the synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
What is synthetic material?Synthetic materials are microplastic pollution and madeup up of polymers which is a long chain of polymers and the process is known as polymerization.
The synthetic materials are often converts into microplastic that takes a long period of time to decompose and they are also responsible for generation of greenhouse gases.The synthetic material which is popularly known is nylon which is very tough to recycle.
Therefore,synthetic material are turned as microplastic which takes a long period of time to decompose. By this way the synthetic materials are very harmful for the society.
Learn more about synthetic material here:
https://brainly.com/question/24357817
#SPJ2
PLEASE HELP!! I GIVE BRAINLIEST
1)Which process represents chemical change?
A. A lake freezes over into ice.
B. A metal bar is rolled into a flat sheet.
C. Vinegar bubbles when baking soda is added. D. Sand, water, and salt combine to form a mixture.
2)Which process is an example of a physical change?
A. Carrots are cut into small pieces and mixed into a salad.
B. A peanut butter sandwich is eaten and broken down by enzymes in the stomach.
C Sodium metal and chlorine gas are combined to form sodium chloride, or table salt.
D. Sodium metal and water are combined to form a basic compound and a flammable gas.
3) Which of the following is a chemical change?
A. Water boiling
B. Paper being cut
C. Ice melting
D. rusting
4) Which of these is a clue that a chemical change has occurred?
A. A beaker suddenly becomes very warm when you mix two room-temperature it.
B. A liquid forms bubbles when it reaches a high temperature.
C. Water changes color when you add food coloring to it.
D. Sugar crystals disappear when dissolved in water.
5) To cause a chemical change in wood, you can ...
A. Break it.
B. Burn it.
C. Cut it.
D. Saw it.
6) Which of the following is not a good indication that a chemical change has occurred?
A. The formation of gases
B. A change in color
C. A scratched surface
D. The release heat or light
Answer:
1)C 2)B 3)D
Explanation:
1. The process represents chemical change is vinegar bubbles when baking soda is added.
2. The process is an example of a physical change is carrots are cut into small pieces and mixed into a salad.
What is physical and chemical change ?The appearance or form of matter changes during a physical change, but the type of matter in the substance does not.
A chemical change, on the other hand, changes the type of matter and creates at least one new substance with new properties.
3. Rusting is a chemical change.
4. A beaker suddenly becomes very warm when you mix two room-temperature it is a clue that a chemical change has occurred.
5. To cause a chemical change in wood, you can burn it.
6. A scratched surface is not a good indication that a chemical change has occurred.
Thus, The process represents chemical change is vinegar bubbles when baking soda is added.
To learn more about the physical and chemical change, follow the link;
https://brainly.com/question/11321843
#SPJ5
What’s the definition of renewable energy
Answer:
energy from a source that is not depleted when used, such as wind or solar power.
Explanation:
Explanation:
renewable energy is energy from a source that is not depleted when used such as wind or solar power.
Hope this helps :)
Please help my teacher is rushing me
In animals. energy is produced by the:
A. endoplasmic reticulum
B. nucleus
C. mitochondria
D. chloroplast
If a jet traces 395,000 meters in 9000 seconds. What was the speed of the jet?
Answer:
43.89 m/sExplanation:
The speed of the jet can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time taken
From the question we have
[tex]v = \frac{395000}{9000} = \frac{395}{9} \\ = 43.8888...[/tex]
We have the final answer as
43.89 m/sHope this helps you
A student mixes 250 millimeters of a strong base with 100 millimeters of a strong acid. What will the result be?
- a weak base
— weak acid
- a stronger base
- a stronger acid
Answer:
A stronger base.
Explanation:
In neutralization reactions, when an acid is mixed with a base, both species react to different degrees that depends on the concentrations and volumes of the acid and the base. In this case the student mixes a strong base (250 mL) with a strong acid (100 mL), what will happen is that the substance that is going to predominate (strong base) will be the one that is in greater quantity than the other, so the solution will remain a strong base.
PLEASE HELP!!!!!
What role do chemical processes play in the operation of the flashlight?
what is Bohr's atomic model?
Answer:
The Bohr model and all of its successors describe the properties of atomic electrons in terms of a set of allowed (possible) values. Atoms absorb or emit radiation only when the electrons abruptly jump between allowed, or stationary, states. Direct experimental evidence for the existence of such discrete states was obtained (1914) by the German-born physicists James Franck and Gustav Hertz.
Explanation:
What two gases are produced during the electrolysis of water?
Answer:
hydrogen and oxygen.
Explanation:
54. Copper(I) sulfide is formed when copper and sulfur are
heated together. In this reaction, 127 g of copper reacts
with 41 g of sulfur. After the reaction is complete, 9 g of
sulfur remains unreacted. What is the mass of copper
sulfide formed?
SEL
Ma
Answer:
159g
Explanation:
Copper (I) sulfide is formed by the chemical reaction between copper and sulfur. Copper is a limiting reagent that results in the formation of 190.26 grams of copper(I) sulfide.
What is a limiting reagent?A limiting reagent is defined as the reactant that gets completely utilized in the reaction and affects the amount of the product formation. On the contrary, the excess reagent is present in more amounts.
Given,
Mass of copper = 127 gm
Mass of sulfur = 41 gm
Moles of copper:
n = mass ÷ molar mass
n = 127 ÷ 63.546
n = 1.99
Moles of sulfur:
n = 41 ÷ 32.065
n = 1.27
The reaction is shown as:
Cu + S → CuS
Here, 9 g of sulfur remains unreacted and hence is an excess reagent, and copper being consumed is a limiting reagent.
Here, 1 mole of copper reacts to form 1 mole of copper sulfide hence, 1.99 moles of Cu produces, 1.99 moles of copper sulfide.
Mass of CuS is calculated as:
Mass = moles × molar mass
Mass = 1.99 mol × 95.611 g/mol
= 190.26 grams
Therefore, 127 gm of copper and 41 gm of sulfur produces 190.26 grams of copper sulfide.
Learn more about limiting reagents, here:
https://brainly.com/question/26905271
#SPJ2
How many grams are in 7.23 x 10^24 Al atoms?
Answer:
323.76 g
Explanation:
The number of grams of the given atoms of Aluminum is 323.73 grams.
The given parameters:
Atom of the Aluminum, = 7.23 x 10²⁴The number of grams of the given atoms of Aluminum is calculated as follows;
6.02 x 10²³ atoms of Aluminum = 27 grams7.23 x 10²⁴ atoms of Aluminum = ?[tex]= \frac{7.23 \times 10^{24} \times 27 \ g}{6.02 \times 10^{23}} \\\\= 323.73 \ g[/tex]
Thus, the number of grams of the given atoms of Aluminum is 323.73 grams.
Learn more about atoms of element here: https://brainly.com/question/6258301
How many molecules are there in 5H20?
A.5
B.7
C.10
D.11
How is light produced in an atom?
Answer:
light is the result of electrons moving between defined energy levels in an atom called shells.
Explanation:
when something exited an atom like collision with another atom or a chemical reaction, an electron may absorb energy boosting it to a higher level shell.
Which type(s) of elements bonded to form the solute that would be considered ionic
and which type bonded to form the solute that would be considered covalent? (i.e.
metal with nonmetal, metal with metal, nonmetal with nonmetal)
Answer:
Ionic Bonds are formed from metal to nonmetals. Covalent Bonds usually form from nonmetals.
Explanation: