Answer:
Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms
Explanation:
Answer:
Avogadro's number
Explanation:
(that was the answer in my textbook)
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.
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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can someone help me create my own chemistry meme with this picture.. ( don’t copy and paste from internet please ) THANKS !
Answer:
When you remember salt is soduim chloride so you put it on everything to feel smart.
Explanation:
Sorry im bad at this : - /
What is the molar solubility of zinc oxalate ( ZnC204) in water? The solubility-
product constant for ZnC04 is 2.7 x 10-8 at 25°C.
O
1.4 x 10-8
O 7.57
5.4 x 10-8
1.6 x 10-4
2.3 x 10-4
Question 12.11 noint)
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
The process of hydrogen bonding involves hydrogen atoms bonding with blank
A. Either oxygen, carbon, or silicon
B. Either nitrogen, Boron, or hydrogen
C. Either fluorine, oxygen, it nitrogen
D. Either fluorine, hydrogen, or sodium
How does changing the temperature affect the chemical reaction?
A) Solubility of the solutes and the reaction rate are increased as the temperature of the reaction is decreased.
B) Lowering the temperature of the chemical reaction increases the concentration of the solute and the reaction rate.
C) Raising the temperature of the reaction increases the reaction rate by increasing the energy and frequency of collisions.
D) Concentration of the solute and pressure of the solution decreases as the temperature of the chemical reaction increases.
Answer:
C
Explanation:
Temperature is directly related to kinetic energy (KE). As we raise temperature, we are raising KE, as well. Particles with more KE move more quickly and with more force.
This means that these particles are more likely to collide with each other and react to allow the chemical reaction to follow through. In turn, if the chemical reaction is more likely to go to completion, the reaction rate increases, eliminating A and B.
The concentration of the solute is not affected by the temperature; in other words, temperature will not increase or decrease the amount of solute in the solution, so eliminate D.
Thus the answer is C.
Hope this helps!
Final answer:
Raising the temperature of a chemical reaction generally increases the rate of reaction due to faster molecular movement, more collisions, and higher chances of overcoming the activation energy barrier. However, the solubility of gases in a solvent typically decreases with increased temperature.
Explanation:
Changing the temperature can significantly influence the rate of a chemical reaction. When you raise the temperature of a chemical reaction, you provide more kinetic energy to the reactants. This increased energy results in the molecules moving faster, leading to a higher frequency of collisions. More importantly, these collisions are more forceful, making it more likely for the reactants to overcome the activation energy barrier and form products. As such, the reaction rate increases with an increase in temperature.
It is important to note, however, that the effect of temperature on solubility can vary depending on the nature of the solute. For example, the solubility of gases such as HCl, NH₃, and SO₂ in a solvent actually decreases with an increase in temperature. This is because a higher temperature gives the gaseous solute molecules more kinetic energy, increasing their tendency to escape the solvent and return to the gas phase.
In summary, among the given options, C) accurately describes the effect of temperature on chemical reactions: Raising the temperature of the reaction increases the reaction rate by increasing the energy and frequency of collisions.
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
Does plateau have low elevation
Answer:
No it does not, plateaus are very elevated
5.22x10-3 = [? ]x 10-2
Answer:490
Explanation: 5.22x10-3= 49.2 49.2x10-2=490
A student synthesized a cobalt amine complex with 11.0323 g of CoCl2·6H2O (limiting reactant, MW = 237.83 g/mol) and collected 9.4705 g of the cobalt amine complex (MW = 250.45 g/mol). What was the percent yield?
Answer:
The percent yield would be 81.51%
Explanation:
Number of moles of CoCl2·6H2O would be calculated by using the formula
number of moles = given weight/molecular weight.
Thus, by putting values,
= 11.0323/237.83
= 0.046387
Number of moles of CO+2 = Number of moles of CoCl2·6H2O = 0.046387
As we know that CoCl2·6H2O is a limiting reactant, therefore, the number of moles of complex = Number of moles of CO+2 = 0.046387.
Hence, we can calculate the mass of the complex as follows:
Molecular weigth x number of moles = 250.45 x 0.046387
Thus, the theoratical yield would be 11.6176.
We know that actual yield as given in statement is 9.4705 g. Therefore, percent yield would be,
= (9.4705 / 11.6176) x 100
= 81.51%
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.
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).
To make a 4.00 M solution, how many moles of solute will be needed if 12.0 liters of solution are required?
A: 6 mol
B: 12 mol
C: 48 mol
D: 120 mol
Answer:
C
Explanation:
Molarity=number of moles/volume
Hence:
Moles required=Molarity×volume
=4mol/L×12L=48moles
Hint:As L(litre will cancel out))
Answer is C
The required moles of solute will be "48 mol".
Molar solutionAn aqueous solution containing one mole of something like a chemical dissolved throughout one liter of water or liquid is considered a Molar solution.
According to the question,
Molarity = 4 M
Volume = 12 L
We know the formula,
→ Molarity = [tex]\frac{Number \ of \ moles}{Volume}[/tex]
or,
→ Moles required = Molarity × Volume
By substituting the values, we het
= 4 × 12
= 48 moles
Thus the correct answer be "Option C" i.e., 48 mol.
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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:
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:
Which type of bond shows two or more atoms sharing electrons?
Metallic
Covalent
Tonic
Equal
Need ASAP!
Answer:
Covalent is the type of bond.
Answer:
Covalent
Explanation:
Took the test and got it right :)
In the following reaction, H3PO4 (aq) + H2O (l) ⇄ H2PO4– (aq) + H3O+ (aq) what happens when more H2PO4– (aq) is added to the solution?
Answer:
The concentration of H₃PO₄ will increase.
Explanation:
H₃PO₄(aq) + H₂O(l) ⇄ H₂PO₄⁻(aq) + H₃O⁺(aq)
According to Le Châtelier's Principle, when we apply a stress to a system at equilibrium, the system will respond in a way that tends to relieve the stress.
If we add more H₂PO₄⁻, the position of equilibrium will move to the left to get rid of the added H₂PO₄⁻.
The concentration of H₃PO₄ will increase.
Select the reasons why organisms are classified. Check all that apply.
to name them
to determine their lifespan
to form groups
to allow identification
to show relatedness
to identify their habitats
Answer:
ACDE
Explanation:
just answered this question on edg
Answer: A C D and E
Explanation: I just did it.
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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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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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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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:
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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:
In water, compounds that releases __________ ions are known as _________
Answer:
hydrogen,Acids
Explanation:
Hope this helps you
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
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:
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.
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