Answer:
this is your answer 133.0g
Why does the solubility of alkaline earth metal hydroxides in water increase down the group?
Answer:
The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.
(answer is a period table element!) When apprehending a suspect, try not to put your ____ on him.
Answer:
H
Explanation:
try not to put your hands on him
Solar and wind energy are both intermittent resources that cannot be relied upon for a constant stream of energy production. Explain why developing better ways to store energy is an important part of making these energy sources more practical to use.
By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers.
By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers. Energy storage's inherent ability to offer backup power in the event of grid failure is a feature that both residential consumers and commercial owners find highly desirable.
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16. Which of the following is considered to be a vector?
A. Velocity
B. Temperature
C. Time
D. Mass
Answer:
Velocity
Explanation:
it is the rate of displacement over time in a SPECIFIED DIRECTION i.e it has both magnitude and direction
Peter woke up in the middle of night in darkness. Without being able to see, he was able to make his way to the bathroom without running into any objects in his path. Which of the following best describes how he is able to do this?
The answer choice that best describes this is C. Peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness.
How is Peter able to move in the dark?Here, the sensory organs in Peter's eyes, ears, nose, mouth, and internal organs are specialized organs that allow each receptor type to convey a different sensory modality to eventually integrate into a single perceptual frame.
As a result of these sensory organs, Peter will eventually go stuttering when he wakes up in the middle of the night in complete darkness. However, he was able to make his way to the bathroom without bumping into any objects in his path.
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Peter woke up in the middle of night in darkness. Without being able to see, he was able to make his way to the bathroom without running into any objects in his path.
Which of the following best describes how he is able to do this?
A. Peter's brain received visual information from sensory receptors other than his eyes, so there was no change in how his body responded to the darkness around him.
B. Peter's brain used only stored memories as input when he moved through the darkness, as all sensory receptors are directly tied to the visual system.
C. Peter's brain still received messages from his other sensory receptors, which his brain combined with stored memories in order to move through the darkness.
D. Peter's brain used only messages received from his other sensory receptors when he moved through the darkness, as the visual system is not an important part of the central nervous system.
What do I need to add to make the reaction
Let's see the original equation:
\(1C_2H_2+2H_2\to1C_2H_6.\)In the reactants, we have 1 mol of C2H2 and 2 moles of H2. And in the products, we have 1 mol of C2H6.
Below the image, you can see that 2 moles of C2H2 are reacting with 8 moles of H2 but you can realize that there is an excess of H2, because if we want to use 2 moles of C2H2, we will require just 4 moles of H2.
You can note this by multiplying each number of moles in the initial equation by two. The chemical reaction, based on these numbers would be:
\(2C_2H_2+4H_2\to2C_2H_6.\)So, in the reaction we're going to have 2 moles of C2H6, on the leftovers reactants: 0 moles of C2H2 and 4 moles of H2 because we're only requiring 4 moles of H2 from 8 moles of this.
How many moles are in 33 grams of Boron (B)?
Answer:
2.77495 moles
Explanation:
Boron= 10.811g (according to periodic table)
\(33g*\frac{1mole}{10.811g B}=2.774951 moles B\)
In the following chemical wording, which atom gains electrons?(The formula is in the picture)The answers to choose are:•none•aluminum•oxygen•iron
Hierro
El número de oxidación del hierro en el lado izquierdo de la reacción es +3 mientras que en el lado derecho está como hierro metálico, es decir su número de oxidación es 0
deprotonate enolate enone
what do these terms mean?
Deprotonation refers to the removal of a proton from a molecule, while an enolate is an anionic species formed by deprotonation of the α-carbon adjacent to a carbonyl group. An enone, on the other hand, is a molecule containing a carbon-carbon double bond and a carbonyl group.
"Deprotonate," "enolate," and "enone" are terms used in organic chemistry to describe specific reactions and functional groups. Let's break down each term:
Deprotonate: Deprotonation refers to the removal of a proton (H+) from a molecule. It is a process that involves the transfer of a proton from a molecule to a base. The resulting species is negatively charged and called an anion.
Deprotonation reactions are common in various organic reactions and play a crucial role in the formation of new bonds and the generation of reactive intermediates.
Enolate: An enolate is an anionic species that contains a carbon-carbon double bond and a negatively charged oxygen or nitrogen atom. Enolates are formed through deprotonation of the α-carbon adjacent to a carbonyl group (such as a ketone or aldehyde).
The formation of enolates is an important step in many organic reactions, such as aldol condensation and Michael addition, as enolates serve as nucleophiles or reactive intermediates.
Enone: An enone is a molecule that contains a carbon-carbon double bond (C=C) and a carbonyl group (C=O) adjacent to each other. Enones are carbonyl compounds that possess a conjugated double bond system. They exhibit unique reactivity due to the presence of both a double bond and a carbonyl group, making them valuable intermediates in organic synthesis.
Enones are involved in various reactions, including Michael additions, Diels-Alder reactions, and cycloadditions, to form complex organic compounds.
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Which group would most benefit from the claim?
O people who sell coffee with caffeine
• people who sell decaffeinated tea
• diners that serve only drinks without caffeine
O manufacturers of caffeine-free bottled fruit juice
The group that would most benefit from the claim is people who sell coffee with caffeine.
What was the claims assertion?Caffeine increases mental alertness, making it ideal for activities related to the workplace because it makes a person more attentive, aware of their surroundings, and better able to keep up with tasks.
Caffeine enhances motor coordination, which is the capacity to coordinate various body parts to produce complicated movements. Among those who are active, the capacity to enhance motor coordination may increase need for caffeine.
The organizations who would gain most from the claim are the dealers in caffeinated items, including; based on the link of caffeine with benefits that are desired by active people (working people who earn income).
Therefore, option A is correct.
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What happens to the amount of solution when we add food colour to it?
Answer:
We need more? What else is in the question? This is unanswerable.
Explanation:
D. 1004 square feet is how many square inches?
Answer:
144,576
Explanation:
multiply the area value by 144
Calculate the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O (Cu = 64 S = 32 H = 1 0 = 16).
The relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 249.
What is molecular mass?Molecular mass is a measure of the total mass of one mole of a substance, which is defined as the mass of the substance divided by the number of molecules it contains. It is typically expressed in g/mol and is also known as molar mass. Molecular mass is determined by the types and number of atoms that compose a molecule, and is an important factor in understanding the properties of a substance.
This is calculated by adding the atomic masses of all the atoms present in the compound.
The atomic mass of copper is 64, sulphur is 32, oxygen is 16, and hydrogen is 1.
So, the relative molecular mass of hydrated Copper (II) tetraoxosulphate (VI) CuSO4.5H₂O is 64 + 32 + (16*4.5) + (1*5) = 249.
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In the chapters you read for this lesson, Jonas finds out what role he will play in his community. However, after the Ceremony of Twelve, Jonas leaves the auditorium even more worried than he was before. What theme is suggested by the events that begin the novel’s rising action?
Unless you learn your weaknesses, you can never know yourself.
Even in a safe place, it’s easy to become frightened.
Wherever people gather together, there will be dishonesty.
A society based on control may have some dark secrets.
In the chapters of The Giver by Lois Lowry, Jonas the protagonist finds out what role he will play in his community. However, after the Ceremony of Twelve, Jonas leaves the auditorium even more apprehensive than he was before. "The theme that is suggested by the events that begin the novel’s rising action is that A society based on control may have some dark secrets." (Option D).
What is the justification for the above conclusion?When children attain the age of twelve, they undergo the maturity rite. Surprisingly, the job he is assigned leads him to challenge those norms and practices, which he begins to do towards the close of Chapter 9.
The laws that allow him to act differently—he is allowed to be nasty and lie, among other things—encourage him to think differently: for the first time, his freedom to lie makes him wonder if other individuals in his society are also allowed to lie. Jonas begins to lose confidence and trust in the people in his village.
This minor lack of confidence reminds us how perilous it is to Jonas' society's framework to allow free choice or to foster free opinion.
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How many particles are there in 0.057 moles of lithium bromide made
There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.
What chemical compound is lithium bromide known by?The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.
we have to use Avogadro's constant,
Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.
we can use the following formula:
number of particles = moles x Avogadro's constant
Substitute the values,
number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol
Simplifying the equation
number of particles = 3.44 x 10^{22} particles
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HELP
____________ sweat by water from the leaf cells __________________ into the air, which pulls _______________________ from the leaf into the air.
Answer:
Water sweated by water from the leaf cells evaporating into the air, which pulls water and nutrients from the leaf into the air.
On a cold winter morning when the temperature is -13°C, the air pressure in an automobile tire is 1.5 atmand the volume is 2.5 L. How many moles of gas would the tire hold?
Answer
0.18 moles of gas
Explanation
Given:
Temperature, T = -13 °C = (-13 + 273.15 K) = 260.15 K
Pressure, P = 1.5 atm
Volume, V = 2.5 L
What to find:
The number of moles of gas the tire hold.
Step-by-step solution:
The number of moles, n of gas the tire hold can be determined using the ideal gas equation.
\(\begin{gathered} PV=nRT \\ \\ \Rightarrow n=\frac{PV}{RT} \end{gathered}\)Plugging the values of the given parameters and R = 0.0821 atm•L/mol•K into the ideal gas equation;
\(n=\frac{1.5\text{ }atm\times2.5\text{ }L}{0.0821\text{ }atm•L/mol•K\times260.15K}=0.175575648\text{ }mol\approx0.18\text{ }mol\)The number of moles of gas the tire would hold is 0.18 moles
Solder is a silver metal used to hold pipes together. When the solder is heated, it melts and acts as a type of metal "glue." Mrs. Hanley heats a piece of solder until it melts between two pipes. What best identifies the point at which a physical change first takes place?
A)when the solder melts
B)when the solder cools down
C)when the solder is a soft metal
D)when the solder becomes solid again
Answer:
A
Explanation:
Select all the correct answers.
Which two generalizations can be made based on what you know about cycles of matter in a closed system?
o New matter is added, and old matter is destroyed.
O Matter changes its physical form, allowing it to return to its original state.
O The amount of matter within the system remains the same.
O Matter and energy can cross the boundaries of the system.
The cycle has a well-defined starting and stopping point.
PLSS HELP
Answer:
3) The amount of matter within the system remains the same
5) The cycle has a well-defined starting and stopping point.
Explanation:
A closed system is a system that the boundaries of a system cannot be passed by either matter or energy.
Hence, generalisations can be made based on a closed system and the law of conservation of mass which states that matter can neither be created nor destroyed but can only change form.
jojojoojojoojoojoj , sdincicnjojo
Answer:
?
Explanation:
Where do reactions in a solid generally take place?
A. At the center of the solid.
B. All throughout the solid
C. Only on opposite sides of the solid due to repelling forces.
D. On the surface of the solid.
Answer:
It's D. On the surface of the solid.
Explanation:
If the reactant is a solid, the surface area of the solid will impact how fast the reaction goes. This is because the two types of molecule can only bump into each other at the liquid solid interface, i.e. on the surface of the solid. So the larger the surface area of the solid, the faster the reaction will be.
Does any know the answer to the first three question
1. C) Molarity is indirectly related to volume.
2. A) The CaCl2 beaker has more ions in solution.
3. the molarity of the NaCl solution is 0.0513 M.
How to find the molarityStep 1: Convert 30g of NaCl to moles.
The molar mass of NaCl is 58.44 g/mol. To convert 30 g to moles, divide by the molar mass:
30 g NaCl / 58.44 g/mol = 0.513 mol NaCl
Step 2: List Given and asking information.
Given:
Mass of NaCl = 30g
Volume of solution = 10.0L
Asking:
Molarity of the solution = ?
Step 3: set Molarity Formula and plug the mole/ Volume into the formula.
Molarity = moles of solute / volume of solution
Molarity = 0.513 mol / 10.0 L = 0.0513 M
Therefore, the molarity of the NaCl solution is 0.0513 M.
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What state
of matter
exists in
area B?
A. gas
B. liquid
C. solid
Pressure
(atm)
61
6543210
0
50 100 150 200
Temperature (°C)
Considering the phase diagram, the state of matter that exists in area B is gas.
The correct option is A.
What is a phase diagram?A phase diagram is a graphical representation that shows the conditions of temperature and pressure at which different phases or states of a substance exist.
The axes of a phase diagram typically represent temperature (usually on the horizontal axis) and pressure (usually on the vertical axis). The diagram is divided into regions that correspond to different phases, and the lines separating these regions represent phase boundaries.
The point where three phase boundaries meet is known as the triple point, which represents the temperature and pressure at which all three phases can coexist in equilibrium.
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Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen (02) to produce carbon dioxide (CO2) and gaseous water (H2O). Suppose 34.g of butane s mixed with 200. g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.
The maximum mass of water that can be produced by the reaction is 43.3 g, rounded to three significant figures.
Determining the maximum mass of water producedThe balanced chemical equation for the reaction between butane and oxygen is:
C4H10 + 13/2 O2 → 4 CO2 + 5 H2O
From the equation, we can see that 1 mole of butane reacts with 13/2 moles of oxygen to produce 5 moles of water.
moles of butane = 34. g / 58.12 g/mol = 0.585 mol
moles of oxygen = 200. g / 32.00 g/mol = 6.25 mol
Determining the limiting reactant.
butane : oxygen = 0.585 mol : 6.25 mol
= 0.0936 : 1.00
stoichiometric ratio = 1 : 13/2
= 0.7692 : 1.00
Since the actual ratio is lower than the stoichiometric ratio for oxygen, it is the limiting reactant.
The maximum amount of water that can be produced is determined by the amount of limiting reactant (oxygen).
moles of water = 5/13 * 6.25 mol
= 2.403 mol
Finally, we can convert the moles of water to grams:
mass of water = 2.403 mol * 18.015 g/mol
= 43.3 g
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How would I find the answer?
Answer:
Kr
Explanation:
The noble gas that is isoelectronic with Br⁻ is krypton.
This is because krypton is the closest noble gas to Br on the periodic table.
Electronic configuration of Bromine is;
2, 8, 18, 7
Br⁻ becomes; 2, 8, 18, 8
Krypton is; 2, 8, 18, 8
For the reaction
4PH3(g)↽−−⇀6H2(g)+P4(g)
the equilibrium concentrations were found to be [PH3]=0.250 M, [H2]=0.580 M, and [P4]=0.750 M.
What is the equilibrium constant for this reaction?
c=
The equilibrium constant (Kc) for the given reaction is approximately 16.448. The value of Kc indicates the relative concentrations of reactants and products at equilibrium. In this case, a Kc greater than 1 suggests that the products (H2 and P4) are favored at equilibrium, indicating that the forward reaction is more favorable.
To determine the equilibrium constant (Kc) for the given reaction:
4PH3(g) ↔ 6H2(g) + P4(g)
We can write the equilibrium constant expression based on the stoichiometric coefficients:
Kc = ([H2]^6 * [P4]) / ([PH3]^4)
Substituting the given equilibrium concentrations:
[PH3] = 0.250 M
[H2] = 0.580 M
[P4] = 0.750 M
We can plug in these values into the equilibrium constant expression:
Kc = ([0.580]^6 * [0.750]) / ([0.250]^4)
Kc = (0.0860128 * 0.750) / (0.00390625)
Kc = 16.448
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A small amount of chemical splashes in Frank’s eye. What should Frank do immediately?
Answer:
A small amount of chemical splashes in Frank's eye. What should happen next? Frank should go to the eyewash station while his lab partner tells the teacher what happened.
Explanation:
Brainlist
witch color of light has the least energy?
Answer: Red
Explanation:
need help with this question
Answer:
Sugar, Carbon Dioxide, And Water
Explanation:
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.
In the reaction 2H2(g)+02(g)=2H2O(g) what’s the elements in terms of numbers of molecules,moles,and volume of gases at STP
In this question, we have the following reaction:
2 H2 + O2 -> 2 H2O
At STP (standard temperature and pressure), 1 mol of gas is equal to 22.4 Liters of volume, and also equal to 6.022*10^23 molecules or particles, and this is the Avogadro's constant number. For our question, we have 2 moles of H2, 1 mol of O2 and 2 moles of H2O, according to this, we will have:
1.204*10^24 molecules of H2
2 moles of H2
44.8 L of H2
6.022*23 molecules of O2
1 mol of O2
22.4 L of O2
1.204*10^24 molecules of H2O
2 moles of H2O
44.8 L of H2O