The work done by Henry can be calculated by multiplying the weight of the box (500 N) with the distance it was lifted (0.75 m). Thus, the work done is 375 J (Joules).(D)
In physics, work is defined as the energy transferred when a force is applied to move an object through a distance. The unit of work is Joule, which is the same as Newton-meter. In this question, Henry lifted the box with a force equal to its weight, and the box was lifted through a distance of 0.75 m.
Therefore, Henry did work on the box by transferring 375 J of energy to it. This work is equal to the potential energy gained by the box due to its vertical displacement. The time taken (1.5 seconds) is not relevant to the calculation of work.
To know more about potential energy click on below link:
https://brainly.com/question/24284560#
#SPJ11
6. (20 pts) Provide a synthetic route to prepare the target molecule using the malonic ester synthesis. All the carbon in the product must derive from the given starting materials, but you can use any other necessary reagents.
Answer: Hello some data related to your question is missing attached below is the missing data
answer : attached below is the detailed solution ( synthetic route
Explanation:
Attached below is the synthetic route for the preparation of the target molecule and
we will perform a coupling reaction to get the Final product as seen in the question
Answer question 7. Circle the largest atom or ion in each grouping (I will give brainliest)
S, S^2-, Cl
Al, Al^3+, Mg
Sb, Se, Se^2+
Ca, K^1-, Ca^2+
Be^2+, Be, Na
According to the atomic radius, the largest atom or ion in each grouping are – \(S^2^-\), \(Mg\) , \(Sb\) , \(Ca\) , \(Na\) .
A measure of the size of an atom is the atomic radius of a chemical element, which is normally the average distance between the core of the nucleus and the outermost isolated electron. There are several non-equivalent descriptions of atomic radius since the border is not a clearly defined physical object.
Since the net nuclear charge steadily rises as a result of higher electron attraction to the nucleus, the radius of atoms decreases across a period. However, as the number of shells in each atom grows along the group, the atomic radius increases.
Neutral atoms typically become larger down a group and smaller across a period. The radius of a neutral atom increases or decreases as it acquires or releases an electron, becoming an anion or cation, respectively.
In the given groupings, the size of the atoms and ions according to the atomic radius is as follows:
\(S^2^- > S > Cl\)
\(Mg > Al > Al^3^+\)
\(Sb > Se^2^- > Se\)
\(Ca > K^+ > Ca^2^+\)
\(Na > Be > Be^2^+\)
Learn more about atomic radius here:
https://brainly.com/question/20889495
#SPJ9
Copper exists in nature as two isotopes. The atomic masses and relative abundance of these isotopes is given in the table. What is the average atomic mass of copper? A. 62. 93 amu B. 63. 55 amu C. 63. 935 amu D. 64. 94 amu E. 127. 87 amu.
The average atomic mass of copper is 63.55.
The correct option is B. 63. 55
What is copper?Copper is a chemical element with the symbol Cu. This is a metal that is a ductile, malleable, and good conductor of electricity.
Now,
The two isotopes of copper are:
63Cu with the isotopic mass 62.93
65Cu, with an isotopic mass of 34.93
63Cu has a 69.2% abundance.
65Cu has 30.8% abundance.
The average atomic mass of Cu will be
62.93×69.2% + 64.93×30.8% = 63.55 amu.
Thus, the average atomic mass of copper is 63.55.
Learn more about copper, here:
https://brainly.com/question/13677872
NEED HELP ASAP! PLEASE!
The incomplete table below shows selected characteristics of different types of bonds.
What type of bond is most likely being represented in row 1?
ion-dipole
ionic
metallic
covalent
Answer: B.) Ionic
Explanation: It is B because it is the type of bond that is most likely being presented in row 1.
A covalent bond is most likely being represented in row 1. Hence, option D is correct.
What is a covalent bond?A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
The covalent bond is formed by the mutual sharing of valence electrons of one atom with the valence electrons of another atom. The covalent bond formed may be a single bond, a double bond or a triple bond.
If two electrons are shared between two atoms, then the single covalent bond is formed.
If four electrons are shared between two atoms, then a double bond is formed.
If six electrons are shared between two atoms, then a triple bond is formed.
Covalent network compounds are not malleable or ductile as the covalent bonds do not allow the atoms to move.
Hence, option D is correct.
Learn more about the covalent bond here:
https://brainly.com/question/19382448
#SPJ2
What kind of pi ligands do weak field ligands correspond to in the MO picture of bonding for coordination complexes
In the MO (Molecular Orbital) picture of bonding for coordination complexes, weak field ligands corresponds to pi donors.
What are ligands?
Ligands are molecules or ions that bind to a central metal atom or ion, creating a coordination compound. The primary metal atom or ion in a coordination compound is surrounded by ligands that donate their lone electron pairs. In the MO diagram of coordination complexes, the metal atom/ion has a d-orbital that accepts the lone electron pairs donated by the ligands. The electron pairs donated by the ligands combine with the electrons in the d-orbitals to form new molecular orbitals. The donor strength of ligands in coordination chemistry is classified as either strong or weak. Potent field ligands are those that donate electrons that result in the pairing of the metal ion's d electrons, while soft field ligands do not. Pi donor ligands are weak field ligands.
Learn more about MO (Molecular Orbital) at https://brainly.com/question/20912921
#SPJ11
What cell tissue helps carry messages? nerve muscle tissue
Answer:
Neuron Tissues
Explanation:
Please help me with this question, I already did part a and part b. Can someone please tell me how to do part c, d, e, f, g, and h. If you don't know the answer to all parts then just tell me the answer to the parts you know, and if you can also explain it will be very helpful
Answer:
Most Medicare Advantage plans also fold in prescription drug coverage. Not all of thesef, g, and h. If you don't know the answer to all parts then just tell me the answer to the parts you know, and if you
The best way to clean any computer component or device is to follow the manufacturer's instructions in your user manual.
Always power off the system first.
Always use anti-static wristband or other professional grounding devices.
Never work on carpeted surfaces.
Please help me with this question, I already did part a and part b. Can someone please tell me how to do part c, d, e,
Which labels best complete the diagram? X: High resistance Y: Low resistance Z: Flow of electrons X: Low resistance Y: Flow of electrons Z: High resistance X: Flow of electrons Y: High potential energy Z: Low potential energy X: Low potential energy Y: High potential energy Z: Flow of electrons
Answer: D or
X
Y
Z
Explanation:
Answer: the answer should be B
Explanation:
Calculate the x and y components of the net force on the ring ΣF
x
= ΣF
y
= Is the 1
st
law of Newton obeyed? Justify. \begin{tabular}{cc|c|c} T
xN
& 0.139N & −0.220N & −0.28N \\ \hlineT
yN
& 0.209N & 0.117N & 0N \end{tabular}
Given the following: \begin{tabular}{cc|c|c} T
xN
& 0.139N & −0.220N & −0.28N \\ \hlineT
yN
& 0.209N & 0.117N & 0N \end{tabular}Calculating the x and y components of the net force on the ring ΣF: For x components of ΣF:ΣF
x
= T
x
1
+ T
x
2
+ T
x
3
ΣF
x
= 0.139 N - 0.220 N - 0.28 N ΣF
x
= -0.361 NFor y components of ΣF:ΣF
y
= T
y
1
+ T
y
2
+ T
y
3
ΣF
y
= 0.209 N + 0.117 N + 0 N ΣF
y
= 0.326 NThus, the components of the net force are: ΣF
x
= -0.361 N, ΣF
y
= 0.326 N
Newton’s 1st law: Every body will continue in a state of rest or of uniform motion in a straight line unless compelled to change that state by forces impressed upon it. This law is obeyed since the sum of the forces on the ring is not zero. It would continue in its motion, if there were no net force acting upon it.
#SPJ11
24.60 mL of 0.1852 M HNO3 is titrated to the phenolphthalein end point with 27.35 mL of a KOH solution. What is the molarity of the KOH solution
The molarity of the KOH solution is 0.1647 M when titrated to the phenolphthalein end point with 27.35 mL of a KOH solution.
To arrive at this answer, we can use the balanced chemical equation for the reaction between \(HNO_{3}\) and KOH:
\(HNO_{3} + KOH -> KNO_{3}+ H_{2}O\)
We can see that the reaction is a 1:1 ratio, which means that the moles of \(HNO_{3}\) that reacted is equal to the moles of KOH that reacted.
First, we need to calculate the moles of \(HNO_{3}\) that reacted:
moles \(HNO_{3}\)= M x V
= 0.1852 M x 0.02460 L
= 0.00455 moles
Since the moles of KOH that reacted is equal to the moles of \(HNO_{3}\) that reacted, we can use the moles of \(HNO_{3}\) to calculate the molarity of the KOH solution:
moles KOH = moles \(HNO_{3}\) = 0.00455 moles
molarity KOH = moles KOH / V
= 0.00455 moles / 0.02735 L
= 0.1647 M
The molarity of the KOH solution is 0.1647 M.
For more information on molarity kindly visit to
https://brainly.com/question/23894713
#SPJ11
Which energy source would produce the greatest amount of emissions?
The energy source would produce the greatest amount of emissions is fossil fuels.
What Are Carbon Emissions?Emission is related to the process of moving an object. According to the Cambridge Dictionary, emission is the amount of gas, heat, light, etc. that is sent out. This word is often used to refer to heat emission, light emission, to carbon emission.
Carbon emissions are gases released from the combustion of carbon-containing compounds, such as CO2, diesel, LPJ, and other fuels. In a simple sense, carbon emission is the release of carbon into the atmosphere.
Carbon emissions are a contributor to climate change along with greenhouse gas emissions. Excessive gas emissions can cause global warming or the greenhouse effect. This resulted in a significant increase in temperature on earth.
Learn more about emissions at
https://brainly.com/question/20388835
#SPJ4
How do doctors use the scientific method
Answer:
By first asking themselves or others about what they are experiencing, and also by doing the experiment by looking at the person and seeing what is wrong with them. They use a hypothesis to determine later how/what has affected the person in any way.
Explanation:
please give brainlyest
Answer:
Students, and sometimes even teachers, often think scientists only use the scientific method to answer science-related questions. In fact, you can apply the scientific method to almost any problem. The key is to use the elements (steps) to reduce bias and help come to a solution to the problem.
Explanation:
What characteristic of the light is affected by the amplitude of the light
wave
(A) color
(B) brightness
Answer:
I think B but I'm not sure.
Answer: Amplitude of the light wave impacts brightness; the wavelength is what impacts/is associated with color.
Match the definitions to the atomic models. Model names may be used more than once.
Question 3 options:
Supported by Rutherford's gold foil experiment
A small, dense, positively-charged nucleus surrounded by a negatively-charged electron cloud.
The atom has a small positively-charged nucleus with negatively-charged electrons orbiting in different energy levels.
This is the current model of atomic structure which explains the existence of electron clouds and their discrete energy levels.
Sometimes referred to as the Planetary Model
Was disproved by Rutherford's gold foil experiment
Negatively-charged electrons randomly dispersed in a sea of positive charge.
1.
Plum Pudding Model
2.
Bohr Model
3.
Quantum Mechanical Model
4.
Nuclear Model
Nuclear Model - Supported by Rutherford's gold foil experiment.
Nuclear Model - A small, dense, positively-charged nucleus surrounded by a negatively-charged electron cloud.
Quantum Mechanical Model - This is the current model of atomic structure which explains the existence of electron clouds and their discrete energy levels.
Plum Pudding Model - Was disproved by Rutherford's gold foil experiment.
Plum Pudding Model - Negatively-charged electrons randomly dispersed in a sea of positive charge.
Bohr Model - Sometimes referred to as the Planetary Model.
Bohr Model - The atom has a small positively-charged nucleus with negatively-charged electrons orbiting in different energy levels.
Learn more about atomic models:https://brainly.com/question/25534456
#SPJ1
carbon tetrachloride, once widely used in fire extinguishers and as a dry cleaning fluid, has been found to cause liver damage to those exposed to its vapors over long periods of time. what is the boiling point of a solution prepared by dissolving 375 g of sulfur (s8, 256.5 g/mol) in 1250 g of ccl4? (for ccl4, kb
In the early 1900s, Ernest Rutherford set up an experiment to study the atom. He bombarded thin metal sheets with protons and neutrons. He found that most of particles got deflected a bit, but some of them bounced back as if bouncing off a brick wall. What conclusion came from this experiment?
Answer:
Atoms are mostly empty space.
Which of the following is a correct statement for gases ? All of these.
Gases have a definite shape and volume.
Confined gas exerts a uniform pressure on the walls of its container in all directions.
The volume of gas is equal to the volume of the container holding the gas.
Answer:
B
Explanation:
1
Answer the following questions by using the periodic table where necessary.
1. Which element is most reactive?
B. Ca
C. Ne
D. Ar
A. Na
Based on the periodic table, the element that is most reactive is Na.
The correct option is A.
What are reactive elements?Reactivity is a gauge of an element's propensity to create compounds with other elements. While certain elements require energy to react and are inert, others will do so simply and spontaneously. Reactivity is a gauge of an element's propensity to create compounds with other elements.
Reactive elements are the Group 1 and Group 2 metals. Also, the Group 17 and Group 16 non-metals are reactive non-metals.
Group 1 and Group 2 metals form positive ions easily by electron loss. Group 17 and Group 16 non-metals form negative ions by electron gain.
Learn more about reactive elements at: https://brainly.com/question/25380167
#SPJ1
what is the de Broglie wavelength of an electron traveling at 1.48 x 10^5 m/s?
The formula of De Broglie is the following:
\(\lambda=\frac{h}{mv}\begin{cases}\lambda=wavelength\text{ (m)} \\ h=Planck\text{ constant =6.626}\cdot10^{-34}Js \\ m=mas\text{s (kg)} \\ \text{v=}velocity\text{ (m/s)}\end{cases},\)Remember that the mass of an electron is 9.11 x 10 ^(-31) kg, so replacing in the formula, we're going to obtain:
\(\begin{gathered} \lambda=\frac{6.626\cdot10^{-34}J\cdot s}{9.11\cdot10^{-31}\operatorname{kg}\cdot1.48\cdot10^5\frac{m}{s}}, \\ \lambda=4.91\cdot10^{-9}\text{ m} \end{gathered}\)The answer is that the wavelength of an electron traveling at 1.48 x 10^(5) m/s is 4.91 x 10^(-9) m.
2. Consider the ruler as shown. a) What is the uncertainty of the metric graduation? (express as I value unit) b) What is the length (cm) of the line shown below the metric scale? 3. A student measures the length of an object and obtains 3.65 cm. If the true value (as reported by the instructor) is 3.75 cm, calculate the percent error.
The determined percent error is 2.67%, the uncertainty of the metric graduation is 0.025 cm, and the length of the line is 3.75 cm.
a) The uncertainty of the metric graduation can be calculated as the half of the smallest division on the ruler, which is 0.05 cm in this case. Therefore, the uncertainty would be 0.05 cm / 2 = 0.025 cm.
b) To determine the length of the line shown below the metric scale, we need to make an estimate of the position of the line relative to the scale. Based on the image, it appears that the line is approximately between 3.7 cm and 3.8 cm. Therefore, we can estimate the length of the line to be around 3.75 cm.
3. The percent error, it is calculated as follows:
(True Value - Measured Value) / True Value * 100% is the formula for percent error.
For the student's measurement of 3.65 cm, the percent error would be:
Percent error = (3.65 - 3.75) / 3.75 * 100% = -2.67%
This implies that the student's measurement was 2.67% lower than the true value reported by the instructor.
To know more about percent error please refer:
https://brainly.com/question/1581657
#SPJ4
The complete question is:
Which triacylglycerol yields more energy on oxidation: one containing three residues of linolenic acid or three residues of stearic acid?
The Tricyglycerol yields more energy on oxidation is the one containing three residues of stearic acid because it get fully reduced.
when atom or ion loses the electron in the process called as oxidation or the loss of hydrogen is called as oxidation. when the atom or ion gain electron in the process called as reduction or gain of hydrogen is called as reduction
when the oxidation takes place the oxidation state of atom increases and when reduction takes place the oxidation state of species decreases.
when molecule is oxidized, it loses energy and when molecule is reduced , it gains energy
Thus ,we can say that,The triacyglycerol cotaining the three stearic acid residues yield more energy because it is fully reduced.
To learn more about Triacyglycerol here
https://brainly.com/question/13673197
#SPJ4
The photo shows wires made of pure copper, an element,
What would the smallest piece of copper be?
(The chemical reaction is respiration)
What mass of carbon dioxide forms in the reaction of 25 grams of glucose with 40 grams of oxygen? And what is the limiting reagent in the reaction?
Calculate the mass (g) of 1.5 moles of Sulfur.
Answer:
48 g S
Explanation:
Step 1: Define
Molar Mass of Sulfur (S) - 32.07 g/mol
Step 2: Use Dimensional Analysis
\(1.5 \hspace{3} mol \hspace{3} S(\frac{32.07 \hspace{3} g \hspace{3} S}{1 \hspace{3} mol \hspace{3} S} )\) = 48.105 g S
Step 3: Simplify
We have 2 sig figs.
48.105 g S ≈ 48 g S
Describe the difference
between the smooth
Endoplasmic Reticulum
(ER) and rough
Endoplasmic Reticulum
(ER)
Answer:
Smooth endoplasmic reticulum (SER) is a type of endoplasmic reticulum consisting of tubular vesicles that lack ribosomes on the outer surface and is involved in the synthesis and storage of lipids. Rough ER has ribosomes on the outer surface. Smooth ER does have riboszomes on the outer surface.
Explanation:
6 points
6. According to this equation, how many moles of Ag, S will be produced
from 20 moles of Ag? (Assume H S and O, are in excess). *
-
4Ag + 2H2S + O2 → 2A82S + 2H20
O A. 20 moles
O B. 10 moles
O C. 5 moles
O D. O moles
Answer:
I think it’s 7.0 moles of water.
Explanation:
gj
Scientists are studying a graph showing the time differences between the seismic
P-waves and the seismic S-waves as they travel through Earth. Which information
can they learn from the graph
Answer:
The information that they will learn from the graph is how fast the waves will move and which one has the fastest velocity. What they will notice ia that the P wave will be moving faster and arrive first.
Which of the following is an example of an attempt to improve an
environmental problem caused by chemicals?
A. Shoveling snow off of driveways in the winter
B. Dumping waste into rivers
C. Removing lead from gasoline to reduce air pollution
D. Adding pesticides to crops so they will grow larger
Answer:C. Removing lead from gasoline to reduce air pollution-Apex
Explanation:
Qs on chemical energetics.
The enthalpy of the reaction CO₂(g) + H₂(g) → CO(g) + H₂O(g) is c. 41 kJmol⁻¹
What is enthalpy change?Enthalpy is the heat of a chemical reaction.
Given
CO(g) + 1/2O₂(g) → CO₂(g) ΔH = -283 kJmol⁻¹ (1)
H₂(g) + 1/2O₂(g) → H₂O(g) ΔH = -286 kJmol⁻¹ (2)
H₂O(g) → H₂O(l) ΔH = -44 kJmol⁻¹ (3)
What is the enthalpy change for the following reaction
CO₂(g) + H₂(g) → CO(g) + H₂O(g)
We proceed as follows
Since we have the reaction
CO(g) + 1/2O₂(g) → CO₂(g) ΔH = -283 kJmol⁻¹
Reversing it, we have that
CO₂(g) → CO(g) + 1/2O₂(g) ΔH = +283 kJmol⁻¹ (4)
Now adding reactions (2) to (4), we have that
CO₂(g) → CO(g) + 1/2O₂(g) ΔH = +283 kJmol⁻¹
+ H₂(g) + 1/2O₂(g) → H₂O(l) ΔH = -286 kJmol⁻¹ (2)
CO₂(g) + H₂(g) + 1/2O₂(g) → CO(g) + 1/2O₂(g) + H₂O(l) ΔH = 283 kJmol⁻¹ + (-286 kJmol⁻¹)
CO₂(g) + H₂(g) + 1/2O₂(g) → CO(g) + 1/2O₂(g) + H₂O(l) ΔH = 283 kJmol⁻¹ - 286 kJmol⁻¹
CO₂(g) + H₂(g) + 1/2O₂(g) → CO(g) + 1/2O₂(g) + H₂O(l) ΔH = -3 kJmol⁻¹ (5)
Now, reversing the reaction (3), we have that
H₂O(l) → H₂O(g) ΔH = +44 kJmol⁻¹ (6)
Now, adding reactions (5) and (6), we have that
CO₂(g) + H₂(g) + 1/2O₂(g) → CO(g) + 1/2O₂(g) + H₂O(l) ΔH = -3 kJmol⁻¹ (5)
+
H₂O(l) → H₂O(g) ΔH = +44 kJmol⁻¹ (6)
CO₂(g) + H₂(g) + 1/2O₂(g) + H₂O(l) → CO(g) + 1/2O₂(g) + H₂O(l) + H₂O(g) ΔH = -3 kJmol⁻¹ + 44 kJmol⁻¹
CO₂(g) + H₂(g) → CO(g) + H₂O(g) ΔH = 41 kJmol⁻¹
So, the enthalpy of the reaction is c. 41 kJmol⁻¹
Learn more about enthalpy of reaction here:
https://brainly.com/question/29888663
#SPJ1
I need help please on this
Answer:
Kelp --> sea urchin --> sea otter