Answer:
S = 1.6 E-4 M
Explanation:
ZnCO4 ↔ Zn2+ + CO42-S S S
∴ Ksp = 2.7 E-8 = [Zn2+]*[CO42-]
⇒ Ksp = (S)*(S) = S² = 2.7 E-8
⇒ S² = 2.7 E-8
⇒ S = √2.7 E-8
⇒ S = 1.6432 E-4 M ≅ 1.6 E-4 M
A water molecule collides with a sugar molecule. What type of energy
is transferred in this interaction?
Select one:
Sound energy
Kinetic energy
Chemical energy
Heat energy
Answer:
kinetic energy.
Explanation:
an object in motion collides with another object to make that object in motion.
kinetic energy is the energy of an object being in motion.
Evaluate each scenario described to determine the direction of heat flow.
Answer:
1: tap water to ice cube
2: electric burner to pot
Next section
1: bonfire to air
2: hand to ice
Next section
1: Molecules in the hot water bottle are moving faster than molecules in the skin
2: Molecules in the skin are moving faster than molecules in the glass
Next section
Collisions result in transfer of energy from molecules of higher kinetic energy to molecules of lower kinetic energy
Warm water molecules slow down while cold water molecules speed up
Explanation:
on edg Good Luck!!
Baking Soda Acidic, alkaline, or neutral?*
O
Acidic
Alkaline
Neutral
Answer:
Baking soda, also known as sodium bicarbonate, is a base
Baking soda, or sodium bicarbonate, is an alkaline substance with a pH greater than 7, indicating its basic properties. It reacts with acids in baking to produce carbon dioxide, helping the dough to rise. The correct answer is B) Alkaline.
Sodium bicarbonate, commonly known as baking soda, is a chemical compound with the formula [tex]NaHCO_3[/tex]. It is a white solid that is crystalline but often appears as a fine powder. Baking soda is not neutral or acidic; it has alkaline properties.
When baking soda is dissolved in water, it slightly raises the pH of the solution, making it basic. The pH scale, which measures how acidic or alkaline a substance is, typically ranges from 0 (very acidic) to 14 (very alkaline), with 7 being neutral. Sodium bicarbonate usually has a pH greater than 7; therefore, it can help neutralize acids.
When used in baking, baking soda acts as a base and usually reacts with an acidic ingredient (like lemon juice or buttermilk).
This reaction produces carbon dioxide gas, which causes dough or batter to expand and "rise," giving baked goods their porous texture. The equation for its reaction with an acid is as follows: [tex]NaHCO_3(s) + H^+[/tex] → [tex]Na^+ + H_2O + CO_2[/tex]. This demonstrates baking soda’s role as a base in neutralizing acids and producing carbon dioxide and water.
What type of wave is shown below?
A. Transverse wave
B. Longitudinal wave
C. Combined wave
D. Sound wave
Answer:
It's C (combined wave)
Explanation:
how are biomes determined
Answer: A biome is an area of the planet that can be classified according to the plants and animals that live in it. Temperature, soil, and the amount of light and water help determine what life exists in a biome. A biome is different from an ecosystem. ... Some use broad classifications and count as few as six biomes.
Explanation: Im good in science and stuff
Answer:
they are determined by what kinds of plants and animals are able to live and survive there due to temperature, the amount of water and light there, and soil
Explanation:
Help with this please
Answer:
the generator
Explanation:
which system at equilibrium will shift to the right when the pressure is increased?
A)NaCl(s)-Na+(aq)+Cl-(aq)
b)c2h5OH(l) -- c2h5OH (aq)
c) NH3(g) ---NH3(aq)
d)c6h12o6(s) ---- c6h12o6(aq)
Answer: (C) NH3(g)-- NH3(aq)
Explanation:
The system at equilibrium will shift to the right when the pressure is increased is NH₃(g) = NH₃(aq) and the correct option is option C.
What is Chemical Equilibrium?Chemical equilibrium refers to the state of a system in which the concentration of the reactant and the concentration of the products do not change with time, and the system does not display any further change in properties.
It is the state of a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction. While a reaction is in equilibrium the concentration of the reactants and products are constant.
Equilibrium shifts in the direction of lesser number of moles when the temperature is increased.
Therefore, the system at equilibrium will shift to the right when the pressure is increased is NH₃(g) = NH₃(aq) and the correct option is option C.
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Identify the spectator ions in this reaction:
H+ + Br - + K+ + OH →K+ + Br + H20
Ht and K+
Br- and OH
Kt and Br
DONE
Answer:
K+ and Br-
Explanation:
How much heat is lost when solid Al with a mass of 4110 g cools from 660.0 oC to 25.0 oC?
(Specific Heat of Al is 0.902 J/g x oC)
The amount of heat lost when solid Al cools from 660.0 oC to 25.0 oC is approximately 2,389,101.17 J.
Explanation:To calculate the heat lost, you can use the heat transfer equation: Q = mcΔT, where Q is the heat lost, m is the mass of the object, c is the specific heat capacity of the substance, and ΔT is the change in temperature. In this case, the mass of aluminum (Al) is given as 4110 g and the specific heat of Al is given as 0.902 J/g x oC.
First, calculate the change in temperature: ΔT = T_final - T_initial = 25.0 oC - 660.0 oC = -635.0 oC.
Next, plug the values into the formula: Q = (4110 g)(0.902 J/g x oC)(-635.0 oC) = -2,389,101.17 J.
Therefore, approximately 2,389,101.17 J of heat is lost when solid Al cools from 660.0 oC to 25.0 oC.
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A 50.00 g sample of an unknown metal is heated
to 45.00°C. It is then placed in a coffee-cup
calorimeter filled with water. The calorimeter and
the water have a combined mass of 250.0 g and
an overall specific heat of 1.035 cal/g•°C. The
initial temperature of the calorimeter is 10.00°C.
The system reaches a final temperature of
11.08°C when the metal is added.
What is the specific heat of the metal
Answer:
.1648 cal/g•°C
Explanation:
What is the kinetic energy of a 55 kg girl walking at a velocity of 2m/s?
Answer:
KE = 110 J
Explanation:
I think this is right. I tried. sorry if its wrong!!!!
Explanation:
K.E=M×V^2
=55×4
=220J
This is the kinetic energy of the girl.
How many different kinds of atoms do occur naturally on earth? Why do you think so?
Final answer:
Ninety-two different atoms occur naturally on Earth, and these are detailed in the Periodic Table of Elements. Atoms are distinguished by the number of protons in their nucleus, while isotopes of these elements differ by their neutron count. Evidence of atoms includes the periodic table's structure and Brownian motion.
Explanation:
There are 92 different kinds of atoms that occur naturally on Earth. These are the building blocks of all matter and are listed in the Periodic Table of the Elements. Each atom type, or element, has a unique number of protons in its nucleus, which also dictates the number of electrons that orbit the nucleus.
When considering the number of neutrons, atoms of the same element can have different numbers, leading to various isotopes. For instance, while 99% of carbon atoms on Earth have 6 neutrons, about 1% have 7 neutrons. Thus, what we see in nature is actually a mixture of isotopes, with most elements having at least one stable isotope.
Despite the ancients believing in only four types of atoms (earth, water, air, and fire), we now understand there are many more, with distinct properties such as atomic weight, size, and structure. We can't observe atoms with visible light due to their incredibly small size, which is below the wavelength of light that our eyes can detect. However, we have evidence of their existence, such as the patterns in the periodic table and the phenomenon of Brownian motion.
Can someone please help me
Answer:
c
Explanation:
Manganese dioxide (MnO2(s), Delta.Hf = –520.0 kJ) reacts with aluminum to form aluminum oxide (AI2O3(s), Delta.Hf = –1699.8 kJ/mol) and manganese according to the equation below. 3 upper M n upper O subscript 2 (s) plus 4 upper A l (s) right arrow 2 upper A l subscript 2 upper O subscript 3 (g) plus 3 upper M n (s). What is the enthalpy of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.. –1,839.6 kJ –1,179.8 kJ 1,179.8 kJ 1,839.6 kJ
Answer:
-1,839.6
Explanation:
The enthalpy of the reaction between Manganese dioxide and aluminum to produce aluminum oxide and manganese is -1,839.6 kJ, calculated using the formula for ΔH reaction incorporating the enthalpies of formation of the reactants and products.
Explanation:The enthalpy of the reaction for Manganese dioxide and aluminum to produce aluminum oxide and manganese can be calculated using the formula ΔHrxn = Σ ΔHf products - Σ ΔHf reactants. Here, the ΔHf for MnO2 is -520.0 kJ and for Al2O3 is -1699.8 kJ/mol. The balanced reaction involves 3 moles of MnO2 and 2 moles of Al2O3, so applying this to our equation: ΔHrxn = [2(-1699.8 kJ) + 3(0 kJ)] - [3(-520.0 kJ) + 4(0 kJ)], because the formation of a pure element in its standard state, like solid Mn, is zero. Hence, the ΔHrxn calculates to be -1,839.6 kJ.
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Write the balanced NET ionic equation for the reaction when AlCl₃ and NaOH are mixed in aqueous solution. If no reaction occurs, write only NR.
Answer:
[tex]Al^{3+} + 3OH^{-} ---> Al(OH)_{3}[/tex]
Explanation:
AlCl3 + 3NaOH ---> Al(OH)3 + 3NaCl
[tex]Al^{3+} +3Cl^{-} +3Na^{+}+3OH^{-}--->AL(OH)_{3}+3Na^{+}+3OH^{-}\\\\Al^{3+} + 3OH^{-} ---> Al(OH)_{3}[/tex]
The balanced NET ionic equation for the reaction when AlCl₃ and NaOH are mixed in an aqueous solution is:
Al³⁺(aq) + 3OH⁻(aq) → Al(OH)₃(s)
The reaction between AlCl₃ and NaOH is an exchange reaction:
AlCl₃(aq) + 3NaOH(aq) → Al(OH)₃(s) + 3NaCl(aq) (1)
In this reaction, the ions Cl⁻ and OH⁻ are exchanged between the ions Al⁺³ and Na⁺.
To write the NET ionic equation, we need to write the total ionic equation:
Al³⁺(aq) + 3Cl⁻(aq) + 3Na⁺(aq) + 3OH⁻(aq) → Al(OH)₃(s) + 3Na⁺(aq) + 3Cl⁻(aq) (2)
Since the Al(OH)₃ precipitates, we cannot write it as an ion because it does not dissociate in the aqueous solution.
The net ionic equation of reaction (2) is the following:
Al³⁺(aq) + 3OH⁻(aq) → Al(OH)₃(s) (3)
All repeated ions in reactants and products do not participate in the net ionic equation. That is why we canceled the Na⁺ and Cl⁻ ions in the net ionic equation (eq 3).
Therefore, the balanced net ionic equation is:
Al³⁺(aq) + 3OH⁻(aq) → Al(OH)₃(s)
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A crystal that absorbs water vapor from the air is
C.hygroscopic
Answer:
Does it form solution?
If yes, then B.) deliquescent
If no, then C.) hygroscopic
Explanation:
When a substance is exposed to air, it either gives off or absorbs water (moisture) from the air. These phenomenons are explained in Efflorescence, Hygroscopy, and Deliquescence
Hygroscopic and deliquescent materials are both able to absorb moisture from the air. But while hygroscopic materials (e.g NaCl, silica gel) absorb moisture and become damp and sticky, deliquescent materials (e.g. CaCl2 and solid NaOH) dissolves in water absorbed from the air and liquefy.
3. What is the relationship between the kinetic energy of gas particles and the
temperature of the gas?
Answer:
The average kinetic energy of the particles in a gas is proportional to the temperature of the gas.
Explanation:
Because the mass of these particles is constant, the particles must move faster as the gas becomes warmer.
The Relationship between the kinetic energy and temperature of a gas is : Kinetic energy of a gas is directly proportional to the temperature (K∝T)
Meaning of kinetic energy, temperature and their relationshipKinetic energy is the energy contained by a particle by the reason of it motion.
temperature can be said be the degree of hottness or degree of coldness of a particle.
Because the particles of has have a negligible force when they are heated they become excited and move about randomly. so the more the heat the faster they move.
we can conclude by saying that the Kinetic energy of a gas is directly proportional to the temperature (K∝T).
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Select the term that completes each statement. When acetic acid is dissolved in water to make vinegar, acetic acid is the . When a small amount of carbon is dissolved in iron to make steel, the iron is the . When a small amount of hydrogen gas mixes with nitrogen gas, hydrogen is the . When carbon dioxide gas dissolves in water, water is the . When a small amount of solid iodine is mixed with ethanol, ethanol is the .
Answer:
Solute
Solvent
Solute
Solvent
Solvent
Explanation:
Answer:
1) Solute
2) Solvent
3)Solute
4)Solvent
5)Solvent
Explanation:
This chemical reaction is unbalanced: ___Pb(NO₃)₂(aq) + ___Li₂SO₄(aq) → ____PbSO₄(s) + ____LiNO₃(aq) Which coefficient should appear in front of LiNO₃ in the balanced equation?
1
2
3
4
Answer: 2
Explanation:
The coefficient that should appear in front of LiNO₃ in the balanced equation is 2, to ensure that the number of nitrate ions is conserved between the reactants and the products.
The unbalanced chemical reaction provided is Pb(NO₃)₂ (aq) + Li₂SO₄ (aq) →PbSO₄ (s) + LiNO₃ (aq).. To balance this equation, we must ensure that the number of each type of atom or polyatomic ion on the reactant side equals the number on the product side.
Let's start by looking at the lead (Pb) atoms. There is one Pb atom on the reactant side and also one on the product side, so Pb is balanced. Next, we notice that there are two nitrate (NO₃) ions on the reactant side within the Pb(NO₃)₂ compound. On the product side, each LiNO₃ contains one nitrate ion, so we need two LiNO₃ molecules to balance the nitrate ions. So, the coefficient in front of LiNO₃ should be 2.
Therefore, the balanced equation would be Pb(NO₃)₂ (aq) + Li₂SO₄ (aq) →PbSO₄ (s) + 2 LiNO₃ (aq).
Does plateau have low elevation
Answer:
No it does not, plateaus are very elevated
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)
When combining zinc metal with hydrochloric acid, you notice that you run out of zinc and still have plenty of hydrochloric acid to
continue the reaction. What is the term used to describe the zinc?
Answer:
limiting reactant
Explanation:
The term that will be used to describe zinc in this case is limiting reactant.
A limiting reactant is a reactant that determines the amount of product formed in a chemical reaction. They are often stoichiometrically smaller of all the reactants in a reaction and once they are used up during, the reaction stops.
In this case, the zinc metal in the reaction is completely consumed, making the hydrochloric acid to be in excess. The zinc thus determines the amount of the products formed,
5. Why did the Jews have to turn in their belongings and valuables?
To keep Jews from escaping.
To keep Jews from spending their money.
To allow the Germans a way of financing their cause.
To keep the Jews from escaping and to allow the Germans a way of financing their cause.
Some chemical reactions take a very long time to go to completion or cannot be directly measured. Which law allows one to use two or more thermochemical equations to
calculate the heat of a reaction indirectly?
-Pascal's Principle
-Hess's law of heat production
-Hess's law of heat division
-Hess's law of heat summation
Answer:
D
Explanation:
If you add two or more thermochemical equations to give a final equation, then you also add the heats of reaction to give the final heat of reaction
The population of the Earth at the end of 2018 was approximately 7.7 × 10 9 people. Which of the following is the correct way of representing this number?
Answer:
7700000000
Explanation:
so 7.7 x 10 to the power of 9 is in standard form
to put it into a number you just need to times it by 1000000000
however your answer will only have 8 zeros because of the decimal point
These equations represent the results of dissolving different substances in water. For each dissolution,
the results of a conductivity test are given. The conductivity test involves placing wires connected to a
battery and a light bulb into the solution. If the solution is able to conduct electricity, the bulb will light.
Identify each substance as a strong electrolyte, weak electrolyte, or nonelectrolyte.
(NH4)2SO4(s) → 2NH4+ (aq) + S04 (aq)
light bulb glows brightly:
CuSO4(s) → Cu2+(aq) + SO42-(aq)
light bulb glows brightly:
HF(g) + H2O(1) → H30+ (aq) + F→ (aq)
light bulb glows faintly:
C3H6O(1) → C3H60(aq)
light bulb does not glow:
Answer:
Strong electrolyte
Strong electrolyte
Weak electrolyte
Non electrolyte
Considering the equations, the nature of the electrolyte in each case is as follows;
1) Strong electrolyte
2) Strong electrolyte
3) Weak electrolyte
4) Non electrolyte
What is an electrolyte?An electrolyte is a solution that is able to conduct electricity because of the presence of ions in the solution.
We shall now identify whether or not each solution is a strong electrolyte/ weak electrolyte or non electrolyte;
1) Strong electrolyte
2) Strong electrolyte
3) Weak electrolyte
4) Non electrolyte
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The diagram below shows the movement of particles. What does this piece of evidence best support? The collision theory The Maxwell-Boltzmann distribution. The effect of pressure on reaction rates. The effect of temperature on reaction rates
The diagram below shows the movement of particles. This piece of evidence is best supported by :
the collision theory
Explanation:
Collision theory states that when suitable particles of the reactant hit each other, only a certain fraction of the collisions cause any noticeable or significant chemical change; these successful changes are called successful collisionsCollision theory, theory used to predict the rates of chemical reactions, particularly for gases. The collision theory is based on the assumption that for a reaction to occur it is necessary for the reacting species (atoms or molecules) to come together or collide with one another.Collision theory is how scientists make predictions about how fast chemical reactions take place. Chemical reactions occur when particles are oriented correctly and collide with enough energy to break bonds.Collision theory states that the rate of a chemical reaction is proportional to the number of collisions between reactant molecules. The more often reactant molecules collide, the more often they react with one another, and the faster the reaction rate.
Answer: a
Explanation:
edge
How much heat is released when 0.762 mol of copper cools
from 81.6°C to 52.2°C?
Answer:
548.089 J
Explanation:
-The molar mass of copper is 63.546 grams.
-We obtained the mass of 0.762 moles of copper:
[tex]mass =moles\times molar\ mass\\\\\\=0.762\times 63.546\\\\=48.422\ g[/tex]
-We apply the specific heat formula to calculate the amount of heat released:
[tex]q=mC\bigtriangleup T\\\\\\=48.422\ g\times 0.385 \ J/g\textdegree C\times (81.6-52.2)\textdegree C\\\\\\=548.089 J[/tex]
Hence, the amount of heat released is 548.089 J
The heat released when 0.762 mol of copper cools from 81.6°C to 52.2°C can be calculated using the formula q = mcΔT where q is the heat transferred, m is the mass, c is the specific heat capacity and ΔT is the temperature change. The calculated heat released is approximately -548.07 Joules.
Explanation:To calculate the heat released when 0.762 mol of the copper cools from 81.6°C to 52.2°C, we need to first know the specific heat capacity of copper, which is 0.385 J/g°C.
Calculate the temperature change: ΔT = Tfinal - Tinitial = 52.2°C - 81.6°C = -29.4°C. The negative sign indicates a decrease in temperature or that heat is released. Convert the number of moles of copper to mass: mass = moles x molar mass = 0.762 mol x 63.5 g/mol = 48.4 g. Then, use the equation for heat transfer: q = mcΔT where m is the mass of the copper, c is the specific heat capacity of copper, and ΔT is the temperature change. Substituting the known values gives q = 48.4 g x 0.385 J/g°C x -29.4°C. Doing the math, q = -548.07 Joules. As q is negative, this indicates that heat is released.Learn more about Heat Transfer here:
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What is the Molar mass of Fe2(SO4)3
Answer:
399.88
Explanation:
The molar mass is just the number of total mass of each atom of each element.
2 - Fe = (55.845 x 2) = 111.69
3 - S = (32.06 x 3) = 96.18
12 - O = (15.999 x 12) = 191.988
For oxygen, it's being added 12 times because there is 4 in the compound times the 3 on the outside.
Now, add all of them and you have your answer!
The molar mass of
[tex]Fe2(SO4)3,[/tex]I) sulfate, is calculated by adding up the molar masses of its individual atoms. It has 2 atoms of iron, 3 molecules of sulfate (each containing 1 sulfur atom and 4 oxygen atoms). This adds up to approximately 400.01 g/mol.
Explanation:To calculate the molar mass of
[tex]Fe2(SO4)3[/tex]own as iron(III) sulfate, you should add up the molar masses of all the atoms in the formula. Iron ('Fe') has a molar mass of about 55.85 g/mol. Sulfur ('S') has a molar mass of about 32.07 g/mol, and oxygen ('O') has a molar mass of about 16.00 g/mol. The compound has 2 atoms of iron, 3 molecules of sulfate (each containing 1 sulfur atom and 4 oxygen atoms).
Calculating these gives:
[tex](2*55.85 g/mol) + [3*(32.07 g/mol + (4*16.00 g/mol))] = 111.7 g/mol + 3*96.07 g/mol = 400.01 g/mol[/tex]
So the molar mass of Fe2(SO4)3 is approximately 400.01 g/mol.
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Table salt is a compound or element ? explain
Answer:
Table Salt (NaCl) is a chemical compound formed from Sodium and Chlorine. A Chemical Element is any substance containing only one atomic number and can be used together to form Compounds. ... Salt is considered a chemical compound because it is a stable structure formed of two chemical elements.
Explanation:
How many moles of helium are in a Superman ballon of volume 8.5 L at 92.3 kPa and 287 K?
Answer : The number of moles of helium are, 0.329 mol.
Explanation :
To calculate the moles of helium gas we are using ideal gas equation.
[tex]PV=nRT[/tex]
where,
P = Pressure of [tex]He[/tex] gas = 92.3 kPa = 0.911 atm
V = Volume of [tex]He[/tex] gas = 8.5 L
n = number of moles [tex]He[/tex] = ?
R = Gas constant = [tex]0.0821L.atm/mol.K[/tex]
T = Temperature of [tex]He[/tex] gas = 287 K
Now put all the given values in above equation, we get:
[tex]0.911atm\times 8.5L=n\times (0.0821L.atm/mol.K)\times 287K[/tex]
[tex]n=0.329mol[/tex]
Thereofore, the number of moles of helium are, 0.329 mol.