Answer:
E) 3.0x10⁻¹²
Explanation:
Ksp of Cu(OH)₂ is defined as:
Cu(OH)₂(s) ⇄ Cu²⁺(aq) + 2 OH⁻(aq)
Ksp = [Cu²⁺] [OH⁻]²
When pH is 10.1, [OH⁻] is:
pOH = 14 - pH
pOH = 3.9
pOH = -log [OH⁻]
[OH⁻] = 1.26x10⁻⁴M
Replacing in ksp formula:
4.8x10⁻²⁰= [Cu²⁺] [1.26x10⁻⁴]²
3.0x10⁻¹² = [Cu²⁺]
That means the maximum amount of Cu²⁺ that can be in solution is 3.0x10⁻¹²M, thus, molar solubility of Cu(OH)₂ is
E) 3.0x10⁻¹²
THIS IS A SCIENCE QUESTION NOT A CHEMISTRY QUESTION! Why does the same side of the moon always face Earth?
the rotational period of Earth is the same as that of the moon
the rotational period of Earth is equal to one revolution around Earth
the rotational period of the moon is equal to one revolution around Earth
the rotational period of the moon is different than one revolution around Earth
Answer:yes
Explanation:Because yes
Answer:
C.
Explanation:
The specific heat of copper is 0.4 J/g^ *C If a sample of copper absorbs 480J of energy and its temperature changes from 20.0 ^* c to 60.0 ^ * C what mass of copper was heated?
Answer:
The mass of copper that was heated is 30 g
Explanation:
The formula for the heat supplied, ΔH is;
ΔH = m·c·Δt
Where:
ΔH = Heat supplied = 480 J
m = Mass of the copper sample = Required
c = Specific heat capacity of copper = 0.4 J/(g·°C)
Δt = Change in temperature = T₂ - T₁ = 60° - 20° = 40°C
T₁ = Initial temperature = 20°C
T₂ = Final temperature = 60°C
Therefore, plugging the values, we have;
480 = m×0.4×40
m = 480/(0.4 × 40) = 30 g
The mass of copper that was heated = 30 g.
Which observation indicates that the kinetic molecule theory has limited use for describing a certain gas
Answer:
Please Mark as Brainliest!!!!!!!!!!
Explanation:
Increasing pressure is causing a smaller change in gas volume. The closeness of particles of gas and their low speeds allow intermolecular forces to become important at certain pressured and temperature
At what temperature will 0.0705 mol of Cl2 exert a pressure of 900. torr at a volume of 0.750L? Round to 3 sig figs
Answer : The temperature [tex]Cl_2[/tex] gas is, 153 K
Explanation :
Using ideal gas equation:
[tex]PV=nRT[/tex]
where,
P = Pressure of [tex]Cl_2[/tex] gas = 900 torr = 1.18 atm (1 atm = 760 torr)
V = Volume of [tex]Cl_2[/tex] gas = 0.750 L
n = number of moles [tex]Cl_2[/tex] = 0.0705 mole
R = Gas constant = [tex]0.0821L.atm/mol.K[/tex]
T = Temperature of [tex]Cl_2[/tex] gas = ?
Putting values in above equation, we get:
[tex]1.18atm\times 0.750L=0.0705mole\times (0.0821L.atm/mol.K)\times T[/tex]
[tex]T=152.9K\approx 153K[/tex]
Therefore, the temperature [tex]Cl_2[/tex] gas is, 153 K
In a compound, which type of bond is the sharing of electrons between adjacent atoms?
chemical bond
nuclear bond
hydrogen bond
electric bond bye the way can you help with more in the chat thing i need help
thanks to whoever answers
Answer:
Covalent bond
Explanation:
A new island formed by volcanic action may eventually become populated with living organism as a result of?
After volcanic eruption the new land will be populated with a large number of organisms called pioneer species. The process is called Primary succession.
What is primary succession?The process in which a new land is created or exposed for the first time after volcanic eruption is defined as the primary succession. During this time the lava cools and produces new rocks.
After this first of all the lichens are found to attach themselves to rocks and the plant species which can grow without much soil can appear. Gradually the decomposition of all these plants helps in soil formation.
As a result more and more plants begin to colonize the area. So this land then becomes a fertile land with lot of nutrients and can lead to the formation of forest. Then after secondary succession occurs.
Thus in primary succession the newly formed land has been populated by many living organisms.
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Vinegar, HCl, and H2SO4 are examples of
salt
acid
or base?
Answer:
Acid
Explanation:
Vinegar is a dilute form of acetic acid, while HCl is hydrochloric acid and H2SO4 is sulfuric acid. All of these are acids. Hope this helps!
Answer:
acids
Explanation:
Use the drop-down menus to identify whether each description represents a convex lens, a concave lens, or both.
Has a focal point:
Is thicker in the middle than near the edges:
Creates only a right-side-up image:
Causes light rays passing through it to refract:
Answer:
both
convex lens
concave lens
both
Explanation:
Answer:
A concave lens is
✔ thinner
in the middle than at the edges, and causes light rays to
✔ diverge
.
A convex lens is
✔ thicker
in the middle than at the edges, and causes light rays to
✔ converge
.
Explanation:
Which of the following species cannot act as a Lewis base?
NH2-
NH4+
NH3
N3-
NH2-
Answer:
NH4+
Explanation:
A Lewis base is a substance with the ability to share or give pairs of electrons.
The NH4 + ammonium ion donates a proton, therefore the ammonium ion is a Lewis acid.
The species that cannot act as a Lewis base NH4+.
What is Lewis's base?
It refers to a substance like OH- ion where the pair should be donated of non-binding electrons. It should be treated as the electron-pair donor. Also, the one advantage is that it complements the reduction and oxidation of the reaction model. Moreover, it shows the capability for sharing or providing the pair of electrons. Also, NH4+ donated the portion so ammonium ion is a Lewis acid.
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If I add 375 of water to 125 mL of a 0.90 M NaOH solution, what will the molarity of the diluted solution be?
Answer:
0.225M
Explanation:
Step 1:
Data obtained from the question. This includes:
Volume of the stock solution (V1) = 125mL
Molarity of the stock solution (M1) = 0.90 M
Volume of the diluted solution (V2) = 125 + 375 = 500mL
Molarity of the diluted solution (M2) =..?
Step 2:
Determination of the molarity of the diluted solution.
This is obtained by using the dilution formula as follow:
M1V1 = M2V2
0.9 x 125 = M2 x 500
Divide both side by 500
M2 = (0.9 x 125) /500
M2 = 0.225M
Therefore, the molarity of the diluted solution is 0.225M
Answer:
The molarity of the diluted solution of NaOH is 0.225 M NaOH
Explanation:
Here, we have, initial concentration of the solution = 0.90 M NaOH
Volume of initial solution = 125 mL
Volume of added water = 375 mL
Total volume of diluted solution = 375 mL + 125 mL = 500 mL
Number of moles in the diluted solution = 0.9 × 0.125 = 0.1125 moles of NaOH
Derived from the following relation;
0.9 M NaOH indicates that 1000 mL contains 0.9 moles of NaOH
Therefore, 1 mL contains 0.9/1000 moles of NaOH and 125 mL contains 0.9/1000×125 or 0.9 × 0.125 moles of NaOH
Therefore, the diluted 500 mL solution contains 0.1125 moles of NaOH. Therefore, 1000 mL of the diluted solution will contain [tex]1000 \times \frac{0.1125}{500} \ moles[/tex] of NaOH or 0.225 moles of NaOH
Hence the molarity of the diluted solution of NaOH, which is the number of moles per 1000 mL is 0.225 M.
100 points guys please help me
Answer:
I’m pretty sure its D. Sweating when you are hot
41.6 mL of an HCIO2 solution were
titrated with 14.85 mL of a 0.146 M.
NaOH solution to reach the
equivalence point. What is the
molarity of the HClO2 solution?
Answer:
0.0521 M
Explanation:
HClO2 + NaOH ---> NaClO2 + H2O
M(HClO2)V(HClO2) = M(NaOH)V(NaOH)
M(HClO2)*41.6 mL = 0.146 M*14.85 mL
M(HClO2) = 0.146*14.85/41.6 M = 0.0521 M
What mass of aluminum at 144 Celsius will increase the temperature of 100 g of water by from 10 C to 15 C?
aluminum s = 0.900 water s = 4.184
Answer:
[tex]m_{Al} = 18.019\,g[/tex]
Explanation:
There is a heating process between an aluminium piece and water, which is described by the First Law of Thermodynamics:
[tex]Q_{Al} = - Q_{w}[/tex]
[tex]m_{Al}\cdot c_{Al}\cdot (T_{o,Al}-T) = m_{w}\cdot c_{w}\cdot (T-T_{o,w})[/tex]
The mass of the aluminium piece is therefore cleared and known variables are substituted:
[tex]m_{Al} = \frac{m_{w}\cdot c_{w}\cdot (T-T_{o,w})}{c_{Al}\cdot (T_{o,Al}-T)}[/tex]
[tex]m_{Al} = \frac{(100\,g)\cdot \left(4.184\,\frac{J}{g\cdot^{\circ}C} \right)\cdot (15^{\circ}C-10^{\circ}C)}{\left(0.900\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (144^{\circ}C-15^{\circ}C)}[/tex]
[tex]m_{Al} = 18.019\,g[/tex]
Easy Help Please!!!!!!
Either oxidation or reduction can take place independently in any particular reaction. True or False
Answer:
False
Explanation:
Which of the following is an example of potential energy changing into kinetic energy?
A. A girl climbing up a hill
B. A fruit falling from a tree
C. A car stopping when the brake is applied
D. A child on a swing slowing down as she swings upwards
Answer
B. a fruit falling from a tree
Explanation:
Take, for example, an apple tree. ... The tree uses this energy to build leaves and branches and fruit. When an apple falls from the tree to the ground, its energy of position (stored as gravitational potential energy) is converted to kinetic energy, the energy of motion, as it falls.
Consider the chemical equation below.
Upper M g (upper O upper H) subscript 2 plus 2 upper H upper N upper O subscript 3 right arrow upper M g (upper N upper O subscript 3) subscript 2 plus 2 upper H subscript 2 upper O.
Which is the net ionic equation?
The net ionic equation is:
[tex]\[ \text{OH}^- + \text{H}^+ \rightarrow \text{H}_2\text{O} \][/tex]
To determine the net ionic equation, we first need to write the balanced chemical equation and then identify the spectator ions.
The given chemical equation is:
[tex]\[ \text{Mg(OH)}_2 + 2 \text{HNO}_3 \rightarrow \text{Mg(NO}_3\text{)}_2 + 2 \text{H}_2\text{O} \][/tex]
To balance the equation:
[tex]\[ \text{Mg(OH)}_2 + 2 \text{HNO}_3 \rightarrow \text{Mg(NO}_3\text{)}_2 + 2 \text{H}_2\text{O} \][/tex]
In the balanced equation, all species are dissolved in water, so we can split them into ions to identify spectator ions.
1. Mg(OH)₂ dissociates into [tex]\( \text{Mg}^{2+} \) and \( 2\text{OH}^- \)[/tex]
2. HNO₃ dissociates into [tex]\( \text{H}^+ \) and \( \text{NO}_3^- \)[/tex]
3. Mg(NO₃)₂ dissociates into [tex]\( \text{Mg}^{2+} \) and \( 2\text{NO}_3^- \)[/tex]
4. H₂O does not dissociate significantly.
So, the net ionic equation is:
[tex]\[ \text{Mg}^{2+} + 2\text{OH}^- + 2\text{H}^+ + 2\text{NO}_3^- \rightarrow \text{Mg}^{2+} + 2\text{NO}_3^- + 2\text{H}_2\text{O} \][/tex]
Cancelling out the spectator ions ([tex]\( \text{Mg}^{2+} \) and \( \text{NO}_3^- \)[/tex]), we get:
[tex]\[ 2\text{OH}^- + 2\text{H}^+ \rightarrow 2\text{H}_2\text{O} \][/tex]
Therefore, the net ionic equation is:
[tex]\[ \text{OH}^- + \text{H}^+ \rightarrow \text{H}_2\text{O} \][/tex]
SUU
What explains the key difference between a bomb calorimeter and a coffee cup calorimeter?
A bomb calorimeter is 10 times larger but works the same way
A bomb calorimeter measures heat for liquid products only
A bomb calorimeter has a separate chamber to hold substances and can even measure heat gain or loss for reactions that
do not occur in water.
A bomb calorimeter can measure heat gain or loss in gaseous reactions but is not useful for reactions that occur at high
pressures and temperatures.
Save and Exit
RE
Mark this and retum
Answer: The answer is C
Explanation:
A bomb calorimeter has a separate chamber to hold substances and can even measure heat gain or loss for reactions that do not occur in water.
The third option is correct.
The following information should be considered:
In the case of bomb calorimeters it have the distinct chamber for holding the substance. Also it determined the heat gain or loss with respect to the reactions that does not arise in the water.learn more: https://brainly.com/question/17429689?referrer=searchResults
Comets _____. orbit the Earth are usually found between Jupiter and Mars have very irregular shapes have very elliptical orbits
Comets have very elliptical orbits, are usually found in the outer regions of the solar system, have irregular shapes, and exhibit a coma and tail when they approach the Sun.
Comets are celestial objects that have very elliptical orbits. Unlike planets, which have more circular orbits, comets follow a path that is elongated and elongated.
Comets are usually found in the outer regions of our solar system, beyond the orbit of Mars, in a region known as the Kuiper Belt or the Oort Cloud. These regions are located far away from the Sun, where the gravitational pull is weaker, allowing comets to maintain their elliptical orbits.
The irregular shape of comets is another characteristic feature. Unlike planets, which have a more spherical shape due to their strong gravitational force, comets have a more irregular shape. This is because comets are made up of a combination of ice, dust, rock, and other materials, which can cause them to have a lumpy or uneven appearance.
When a comet approaches the inner regions of the solar system, it can be observed as a bright coma or "head" surrounding a nucleus. The nucleus is the solid core of the comet, composed mainly of ice and rock. As the comet gets closer to the Sun, the heat causes the ice to vaporize, creating a glowing coma and often a tail that points away from the Sun.
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Given the equation representing a system at equilibrium in a sealed, rigid container:
2HI(g) <->H2(g) + I2(g) + energy
Increasing the temperature of the system causes the concentration of
1)HI to increase
2)H2 to increase
3) HI to Remain constant
4) HI to Remain constant
Answer: 1) HI to increase
Explanation:
Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.
[tex]2HI(g)\rightleftharpoons H_2(g)+I_2(g)+energy[/tex]
As the given reaction is exothermic , on increasing the tempearture, the equilibrium will shift in the direction where decrease in tempearture is taking place.So, the equilibrium will shift in the left direction. i.e. towards reactants. Thus amount of [tex]HI[/tex] will increase.
When the temperature of the system increased so it leads the concentration to option 1. HI to increase.
What is L-e-Ch-atelier's principle?It defines that if any change in the reaction variables so the equilibrium should be shifted in the direction so the impact should be minimized.
Since the given reaction is considered to be exothermic, so in the case when the temperature is increased so the equilibrium should be shifted in the direction that reduced the temperature.
Therefore, the equilibrium should be shifted in the left direction.
Hence the first option is correct.
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when using a dichotomous key to identify organisms what do we look at
a. physical features
b. weather patterns
c. environment
d. diet
Answer: A. Physical features
Explanation:
A dichotomous key for identifying organisms primarily uses the physical features of the organisms. The user is required to accurately observe and describe these characteristics to correctly proceed in using the key.
Explanation:When using a dichotomous key to identify organisms, we primarily look at the physical features of the organisms. A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. The key presents a series of choices about the characteristics of the unknown organisms; these choices are based on the physical features. The user must accurately observe and describe the physical features in order to correctly proceed in using the key.
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Which type of muscle tissue aids in digestion
Answer: The muscularis (muscularis externa)
Explanation: please brainliest
the muscle that helps with digestion is a smooth muscle called the tract
A microwave works by focusing microwave light on the food inside of it. Which type of energy transformation takes place in a microwave? A. Heat energy is transformed into light energy. B. Electrical energy is transformed into light energy. C. Heat energy is transformed into electrical energy. D. Light energy is transformed into electrical energy
Answer:
C is the answer
Explanation:
Heat energy is transformed into electrical energy.
Answer:
B. Electrical energy is transformed into light energy.
Describe how a cold front affects weather.
How many grams are there in 4.50 moles of Ba(NO2)2?
To find the mass of 4.50 moles of Ba(NO2)2, you calculate its molar mass using atomic masses and multiply by the number of moles. The result is 1176.03 grams for 4.50 moles of Ba(NO2)2.
Explanation:To calculate the mass of 4.50 moles of Ba(NO2)2, you first need to find its molar mass by adding the atomic masses of barium (Ba), nitrogen (N), and oxygen (O) from the periodic table. The molar mass of Ba(NO2)2 is calculated as follows:
(1 mol Ba)(137.33 g/mol) + (2 mol N)(14.01 g/mol) + (4 mol O)(16.00 g/mol) = 261.34 g/mol
Then, you multiply the molar mass by the number of moles:
(4.50 moles) × (261.34 g/mol) = 1176.03 grams
Therefore, there are 1176.03 grams in 4.50 moles of Ba(NO2)2.
An iron nail rusting is from a process called oxidation, this is an example of a
Answer:
Chemical change
How many moles of Magnesium Oxide are produced when 11 moles of oxygen are reacted ?
Answer:
22Mol
Explanation:
2Mg + O2 --> 2MgO
If 11 mols of O2 reacted with excess Mg with 22 MgO moles will be created
Which type of mixture is likely to separate if it is allowed to sit still?
A. Colloid
B. Solution
C. Alloy
D. Suspension
Answer:
D.
Explanation:
Suspension : for example sand and water. You can separate it when it sits still.
The type of mixture is likely to separate if it is allowed to sit still is suspension. Therefore, option D is correct.
What is suspension ?A heterogeneous mixture of a finely dispersed substance in a liquid is referred to as a suspension. Similar to how salt and water dissolve in one another, the solid is not dissolved in the liquid.
Examples of mixtures that are most frequently used are chalk and water, dirty water, flour and water, dust and air, fog, magnesium milk, etc.
Suspension parts can be divided into three categories: linkages, springs, and shock absorbers. The bars and brackets that support the wheels, springs, and shock absorbers are known as links. The car is padded by springs, which reduce shock loads caused by potholes and bumps in the road.
A fluid mixture that contains solid particles large enough for sedimentation is called a suspension.
Thus, option D is correct.
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Sustainability describes the actions humans can take to try and maintain some sort of balance with the Earth Air quality, water quality and availabilityreduced land erosion, replacing what is taken from the Earth (trees, crops, ) are just a few of the issues that sustainability deals withSelect one of the following scenarios that best describes an individual's actions that would help with sustainability.
A ) Reduced output in wind turbine blades would cut down on the carbon footprint of the factories that complete these tasks. This would help the Earth in the long run . Continually adding chemicals to sewage, after it is treated and before it is released back into the water supply, will help humans and the Earth into the foreseeable future . Adhering to scientifically backed guidelines on how to harvest and replant trees in a way that would not cause soil erosion or a loss in the biodiversity in that specific area would help the Earth in the long run D) Continued use of pesticides , herbicides , insecticides , and rodenticides will allow crops to grow and feed millions of people . The buildup of these chemicals in the environment is too small of a concern to try and change what is currently taking place
Answer:The answer is B
Explanation:
There is less water lost due to evaporation and therefore more available to plants. Mulch and minimum tillage results in twice as much available water as does deep tillage. This is an immediate benefit. We are looking for future benefits: less runoff and erosion, more soil stays in place, the soil is more fertile, and farmers use less fossil fuels.
A sample of hydrogen gas occupies 50.4 L at STP. This sample contains how many moles of hydrogen atoms
Answer: 4.5
Explanation:
bruh i dont have a question what up ?
Answer:
?
Explanation:
Answer : the sky (teehee)