Answers
I believe that leading zeros, and tail zeros without a decimal point are not significant
Related Questions
At 700 K the equilibrium constant KC for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7 × 106. The rate constant for the reverse reaction at this temperature is 0.54 M–1s–1. What is the value of the rate constant for the forward reaction at 700 K?
Answers
Answer : The value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Explanation :
The given chemical equilibrium reaction is:
[tex]NO(g)+O_2(g)\rightleftharpoons NO_2(g)[/tex]
The expression for equilibrium constant is:
[tex]K_c=\frac{[NO_2]}{[NO][O_2]}[/tex]
The expression for rate of forward and backward reaction is:
[tex]R_f=K_f[NO][O_2][/tex]
and,
[tex]R_b=K_b[NO_2][/tex]
As we know that at equilibrium rate of forward reaction is equal to rate of backward reaction.
[tex]R_f=R_b[/tex]
[tex]K_f[NO][O_2]=K_b[NO_2][/tex]
[tex]\frac{K_f}{K_b}=\frac{[NO_2]}{[NO][O_2]}[/tex]
[tex]\frac{K_f}{K_b}=K_c[/tex]
Given:
[tex]K_c=8.7\times 10^6[/tex]
[tex]K_b=0.54M^{-1}s^{-1}[/tex]
Now put all the given values in the above expression we get:
[tex]\frac{K_f}{K_b}=K_c[/tex]
[tex]\frac{K_f}{0.54}=8.7\times 10^6[/tex]
[tex]K_f=4.70\times 10^6[/tex]
Therefore, the value of the rate constant for the forward reaction at 700 K is, [tex]4.70\times 10^6[/tex]
Final answer:
The rate constant for the forward reaction of NO with O2 forming NO2 at 700 K, given the equilibrium constant and the reverse reaction rate, is calculated to be 4.698 × 10^6 M⁻¹s⁻¹.
Explanation:
The question asks for the rate constant for the forward reaction of NO(g) reacting with O₂(g) to form NO₂(g) at 700 K, given the equilibrium constant (KC) and the rate constant for the reverse reaction. To find the rate constant for the forward reaction (kf), we use the relationship between the equilibrium constant and the rate constants of the forward and reverse reactions, which is KC = kf / kr. Given KC = 8.7 × 106 and the reverse rate constant (kr = 0.54 M⁻¹s⁻¹), we can rearrange the formula to solve for kf: kf = KC × kr. Substituting the given values yields kf = 8.7 × 106 × 0.54 M⁻¹s⁻¹ = 4.698 × 106 M⁻¹s⁻¹.
In 1911, Ernest Rutherford tested the atomic model existing at the time by shooting a beam of alpha particles (42He, helium nuclei) at a very thin sheet of gold foil. He found that while most particles went straight through the foil undeflected, a very few were deflected at great angles as they passed through the foil. Why was this discovery a reason to change the atomic model
Answers
Answer:
At the time of Rutherford's experiment, the accepted model for the atom was the Thomson plum-pudding model of the atom, in which the atom consists of a "sphere" of positive charge distributed all over the sphere, with tiny negative particles (the electrons) inside this sphere.
In his experiment, Rutherford shot alpha particles towards a very thin sheet of gold foil. He observed the following things:
1- Most of the alpha particles went undeflected, but
2- Some of them were scattered at very large angles
3- A few of them were even reflected back to their original directions
Observations 2) and 3) were incompatible with Thomson model of the atom: in fact, if this model was true, all the alpha particle should have gone undeflected, or scattered at very small angles. Instead, due to observations 2) and 3), it was clear that:
- The positive charge of the atom was all concentred in a tiny nucleus
- Most of the mass of the atom was also concentrated in the nucleus
So, Rutherford experiment lead to a change in the atomic model of the atom, as it was clear that the plum-pudding model was no longer adequate to describe the results of Rutherford's experiment.
Final answer:
Rutherford's gold foil experiment disproved the plum pudding model by showing that alpha particles were deflected by a dense nucleus within the atom. This discovery led to a new atomic model where a central nucleus is orbited by electrons.
Explanation:
In 1911, Ernest Rutherford's gold foil experiment challenged the then-accepted plum pudding model of the atom. The plum pudding model hypothesized that an atom's mass and charge were uniformly distributed throughout the atom. This model suggested that alpha particles, which are helium nuclei, would pass through a gold foil with little or no deflection. However, Rutherford's experiment revealed that while most particles passed through the foil, a small percentage (approximately 1 in 8000) were deflected at large angles, and some even bounced back toward the source. This suggested that the atom's mass and positive charge were not evenly distributed, but rather concentrated in a small, central nucleus, leading to the development of the nuclear model of the atom.
Rutherford's findings fundamentally altered the scientific understanding of the atomic structure. The dramatic deflections and backscatterings indicated the existence of a compact, positively-charged atomic nucleus, around which the electrons orbited. This discovery was instrumental in moving away from the plum pudding model to one that reflected the modern view of the atom, where a dense nucleus contains most of the atom's mass and positive charge, with electrons residing in the surrounding empty space.
Which statements correctly describe atmospheric pressure?
Answers
What is a chemical property? It is a characteristic of matter that can be observed without changing its identity. It is a characteristic of matter that can be observed when it changes phases. It is a characteristic of matter that is observable only when the substance is by itself. It is a characteristic of matter that describes its ability to change into a different substance
Answers
Answer:
D
Explanation:
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option D.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Chemical property is a characteristic of matter that describes its ability to change into a different substance.
Therefore, the correct option is option D.
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Calculate the change in molar Gibbs energy of carbon dioxide (treated as a perfect gas) at 20°C when its pressure is changed isothermally from 1.0 bar to (a) 2.0 bar and (b) 0.000 27 atm, its partial pressure in air.
Answers
Answer:
a) ΔG = 1688.5 J/mol = 1.7 kJ/mol
b) ΔG = 21673.3 J/mol = 21.7 kJ/mol
Explanation:
Step 1: Data given
Temperature = 20.0 °C = 293 K
Initial temperature = 1.0 bar = 0.986923 atm
Final temperature = 2.0 bar = 1.97385 atm
Step 2: Calculate
ΔG = RT * ln (Pt / Pi)
⇒with R = 8.314 J/K* mol
⇒with T = 293K
⇒with Pt = final pressure = 1.97385 atm
⇒with Pi = the initial pressure = 0.986923 atm
ΔG = 8.314 J/mol*K *293 K * ln (1.97385/0.986923)
ΔG = 8.314 J/mol*K *293 K * 0.693
ΔG = 1688.5 J/mol = 1.7 kJ/mol
(b) 0.000 27 atm
Step 3:
ΔG = RT * ln (Pt / Pi)
⇒with R = 8.314 J/K* mol
⇒with T = 293K
⇒with Pt = final pressure = 1.97385 atm
⇒with Pi = the initial pressure = 0.00027 atm
ΔG = 8.314 J/mol*K *293 K * ln (1.97385/0.00027)
ΔG = 8.314 J/mol*K *293 K * 8.897
ΔG = 21673.3 J/mol = 21.7 kJ/mol
The molar Gibbs energy change of carbon dioxide at 20°C when its pressure is changed from 1.0 bar to 2.0 bar is 4.08 kJ/mol, and when changed from 1.0 bar to 0.00027 atm is -34.65 kJ/mol.
Explanation:The molar Gibbs energy change of a substance can be calculated using the equation ΔG = RT ln(Pf/Pi), where ΔG is the change in molar Gibbs energy, R is the universal gas constant, T is the absolute temperature, Pf is the final pressure, and Pi is the initial pressure.
Given that temperature (T) is 20°C or 293.15 K, R is 8.314 J/K/mol (universal gas constant), Pi is 1.0 bar, and the pressures Pf are (a) 2.0 bar and (b) 0.00027 atm respectively. We also note that 1 bar is roughly equivalent to 0.986923 atm.
(a) When Pf is 2.0 bar, ΔG = (8.314 J/K/mol)*293.15 K*ln(2.0/1.0) = 4.08 kJ/mol.
(b) When Pf is 0.00027 atm, ΔG = (8.314 J/K/mol)*293.15 K*ln(0.00027/0.986923) = -34.65 kJ/mol.
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A marshmallow has an initial volume of 0.084 L at standard pressure (1.0 atm). If the marshmallow is placed in a vacuum chamber and the final volume is 0.785L, what is the pressure inside the chamber?
Answers
Answer:
The new pressure on the gas P2 = 0.10atm
Explanation:
Data;
V1 = 0.084L
P1 = 1.0atm
V2 = 0.785L
P2 = ?
This question is a practical problem where Boyle's law is applied.
According to Boyle's law, the pressure of a fixed mass of gas is inversely proportional to its volume provided that the temperature on the gas remains constant
Mathematically
P = k / v, k = PV
P1*V1 = P2*V2 = P3*V3..........Pn*Vn
P1 * V1 = P2 * V2
Solving for P2,
P2 = (P1 * V1 ) / V2
P2 = (0.084 * 1) / (0.785)
P2 = 0.10atm
The new pressure of the gas is 0.10atm
Final answer:
Using Boyle's Law, we can determine that the pressure inside the vacuum chamber is approximately 0.107 atm when a marshmallow expands from 0.084 L to 0.785 L at constant temperature.
Explanation:
To determine the pressure inside the vacuum chamber where a marshmallow has expanded from 0.084 L to 0.785 L at constant temperature, we can use the gas laws. According to Boyle's Law, at constant temperature for a given mass, the volume of a gas is inversely proportional to the pressure. The formula for Boyle's Law is P1V1 = P2V2, where P denotes pressure and V denotes volume. Using this law, we calculate as follows:
P1V1 = P2V2
1.0 atm × 0.084 L = P2 × 0.785 L
P2 = (1.0 atm × 0.084 L) / 0.785 L
P2 = 0.084 atm / 0.785
P2 = 0.107 atm
Thus, the pressure inside the vacuum chamber is approximately 0.107 atm when the volume of the marshmallow is 0.785 L.
which of the following will end it’s life cycle as a black hole
Answers
Answer:hope we can be friends
can i please get brainliest
Imagine an enormous cloud of gas and dust many light-years across. Gravity, as it always does, tries to pull the materials together. A few grains of dust collect a few more, then a few more, then more still. Eventually, enough gas and dust has been collected into a giant ball that, at the center of the ball, the temperature (from all the gas and dust bumping into each other under the great pressure of the surrounding material) reaches 15 million degrees or so. A wondrous event occurs.... nuclear fusion begins and the ball of gas and dust starts to glow. A new star has begun its life in our Universe. So what is this magical thing called "nuclear fusion" and why does it start happening inside the ball of gas and dust? It happens like this..... As the contraction of the gas and dust progresses and the temperature reaches 15 million degrees or so, the pressure at the center of the ball becomes enormous. The electrons are stripped off of their parent atoms, creating a plasma. The contraction continues and the nuclei in the plasma start moving faster and faster. Eventually, they approach each other so fast that they overcome the electrical repulsion that exists between their protons. The nuclei crash into each other so hard that they stick together, or fuse. In doing so, they give off a great deal of energy. This energy from fusion pours out from the core, setting up an outward pressure in the gas around it that balances the inward pull of gravity.
Explanation:
The pH scale is actually measuring the concentration of H+ ions in a solution. If there is a high concentration of H+ ions, then the pH of the solution will be
Answers
Answer : The pH of the solution will be less than 7.
Explanation :
pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.
Mathematically,
[tex]pH=-\log [H^+][/tex]
When the pH less than 7 then the solution is acidic and the concentration of hydrogen ion is greater than hydroxide ion.When the pH more than 7 then the solution is basic and the concentration of hydrogen ion is less than hydroxide ion.When the pH is equal to 7 then the solution is neutral and the concentration of hydrogen ion is equal to the hydroxide ion.As per question, if there is a high concentration of hydrogen ions then its pH become less than 7 and the solution will be acidic.
Hence, the pH of the solution will be less than 7.
Answer:
low
Explanation:
If it takes 43.32 mL of 0.1 M NaOH to neutralize a 50 mL HCl solution, what is the molarity of HCI?
Answers
FOLLOW ME FOR CLEARING YOUR NEXT DOUBT
Two-thirds of the sulfur dioxide that pollutes the air is produced by
Answers
Answer:
Power plants.
Explanation:
When power plants start the burning coal process, the chemical bonds carrying its carbon atoms are brake down and releasing energy also carrying heavy metals such as lead, mercury, and cadmium into the atmosphere.
When the sulfur which is present in coal reacts with oxygen it produces sulfur dioxide and they the ability to combines with other lethal toxic molecules that are found in the atmosphere and form small, acidic particulates that can cause several diseases in humans.
Both light and sound travel in the form of waves that are created by a transfer of ____
Answers
Answer: Radioactivity
Explanation:
What type of energy can be generated by splitting atoms?
Answers
Nuclear reactors use fission, or the splitting of atoms, to produce energy. Nuclear energy can also be produced through fusion, or joining (fusing) atoms together.
Answer:
Nuclear energy
Explanation:
hope this helps
What is the source of heat for the Earth? *
ozone
wind
sun
water
Answers
Answer:
plz mark as brainliest
Explanation:
OZONE
Earth keeps a nearly steady temperature, because it makes heat in its interior. In other words, Earth has been losing heat since it formed, billions of years ago. But it’s producing almost as much heat as it’s losing. The process by which Earth makes heat is called radioactive decay.
A reaction is most likely to occur when reactant particles collide with
Answers
Answer: Sufficient amount of energy and appropriate orientation.
Explanation:
A chemical reaction is most likely to occur when reactant particles collide with sufficient amount of energy needed to break bonds and
appropriate orientation .
At an elevated temperature, Kp=4.2 x 10^-9 for the reaction 2HBr (g)---> +H2(g) + Br2 (g). If the initial partial pressures of HBr, H2, and Br2 are 1.0 x 10^-2 atm, 2.0 x 10^-4 atm, and 2.0 x 10^-4 atm, respecivtely, what is the equilbrium partial pressure of H2?
Answers
Answer : The partial pressure of [tex]H_2[/tex] at equilibrium is, 1.0 × 10⁻⁶
Explanation :
The partial pressure of [tex]HBr[/tex] = [tex]1.0\times 10^{-2}atm[/tex]
The partial pressure of [tex]H_2[/tex] = [tex]2.0\times 10^{-4}atm[/tex]
The partial pressure of [tex]Br_2[/tex] = [tex]2.0\times 10^{-4}atm[/tex]
[tex]K_p=4.2\times 10^{-9}[/tex]
The balanced equilibrium reaction is,
[tex]2HBr(g)\rightleftharpoons H_2(g)+Br_2(g)[/tex]
Initial pressure 1.0×10⁻² 2.0×10⁻⁴ 2.0×10⁻⁴
At eqm. (1.0×10⁻²-2p) (2.0×10⁻⁴+p) (2.0×10⁻⁴+p)
The expression of equilibrium constant [tex]K_p[/tex] for the reaction will be:
[tex]K_p=\frac{(p_{H_2})(p_{Br_2})}{(p_{HBr})^2}[/tex]
Now put all the values in this expression, we get :
[tex]4.2\times 10^{-9}=\frac{(2.0\times 10^{-4}+p)(2.0\times 10^{-4}+p)}{(1.0\times 10^{-2}-2p)^2}[/tex]
[tex]p=-1.99\times 10^{-4}[/tex]
The partial pressure of [tex]H_2[/tex] at equilibrium = (2.0×10⁻⁴+(-1.99×10⁻⁴) )= 1.0 × 10⁻⁶
Therefore, the partial pressure of [tex]H_2[/tex] at equilibrium is, 1.0 × 10⁻⁶
Kat is investigating a compound and sees that it has even stronger hydrogen bonds than water. What can kat conclude is most likely true about the specific heat of this compound
Answers
Answer:
It is higher than that of water
Explanation:
Because we now know that through experimentation, the new compound has a higher and stronger hydrogen bonds than water, the specific heat capacity will be higher.
Specific heat capacity is the amount of heat needed to raise the temperature of a unit mass of as substance by 1°C.
This property is a physical property of matter . Most physical properties are a function of intermolecular forces in a compound. Since hydrogen bond is a very strong intermolecular force, the specific heat capacity will be stronger for the compound discovered. This implies that it will require more heat to raise the temperature of a unit mass of this compound by 1°C.Answer:
It is higher than that of water
Explanation:
i just finnished the quiz
An aqueous solution of methylamine (ch3nh2) has a ph of 10.68. how many grams of methylamine are there in 100.0 ml of the solution?
Answers
There are approximately 0.0105 grams of methylamine in 100.0 mL of the solution.
To solve this problem, we need to follow these steps:
**1. Calculate the hydroxide ion concentration:**
* pH = 10.68
* pOH = 14 - pH = 3.32
* [OH-] = 10^(-pOH) = 10^(-3.32) = 4.74 x 10^-4 M
**2. Calculate the Kb of methylamine:**
* Ka = 2.5 x 10^-11 (pKa = 10.60)
* Since methylamine is a weak base, Kb = 1/Ka = 4.0 x 10^-4
* Kb = [CH3NH3+][OH-] / [CH3NH2]
**3. Express the concentration of CH3NH2 in terms of the remaining concentration:**
* Let x be the initial concentration of CH3NH2 (in M).
* At equilibrium, some CH3NH2 will react with water, forming CH3NH3+ and OH-.
* The remaining concentration of CH3NH2 will be x - [OH-].
**4. Substitute concentrations and solve for x:**
* Kb = [CH3NH3+][OH-] / [CH3NH2]
* Kb = ((x - [OH-]) * [OH-]) / (x - [OH-])
* 4.0 x 10^-4 = (x * 4.74 x 10^-4) / (x - 4.74 x 10^-4)
* Solving this equation for x gives x = 0.0034 M
**5. Calculate the moles and grams of methylamine:**
* Moles of CH3NH2 = (0.0034 M) * (0.1 L) = 0.00034 mol
* Molar mass of CH3NH2 = 31.05 g/mol
* Mass of CH3NH2 = (0.00034 mol) * (31.05 g/mol) = 0.0105 g
Therefore, there are approximately 0.0105 grams of methylamine in 100.0 mL of the solution.
A redox reaction involves the reduction of one substance (gaining electron(s)) and the oxidation (losing electron(s)) of another. examples of reduction and oxidation are shown below. combine the two reactions below like algebraic equations and write the net, or overall, redox equation.
Answers
Answer:
Your question is incomplete.
But what I can help you with is once a redox reaction occurs, one element oxidizes and another is reduced, generating the equilibrium of the reaction.
On the other hand, it is important to clarify all the redox reactions, reactions of reducing factors (positive protons) and oxygen that oxidize.
Explanation:
example:
Reduction half-reaction: {2 e ^ - + Cu ^ 2 + -> Cu} {2 e ^ - + Cu ^ 2 + -> Cu}
Half oxidation reaction: {Fe -> Fe ^ 2 + + 2 e ^ -} {Fe -> Fe ^ 2 + + 2 e ^ -}
or more frequently, also called general equation:
{Fe + Cu ^ 2 + -> Fe ^ 2 + + Cu} {Fe + Cu ^ 2 + -> Fe ^ 2 + + Cu}
A mixture of sand and salt containig MgCl2 (100.0 g) is sprinkled on a section of pavement. The total estimated ice on the pavement is 10.0 kg. What is the freezing point of the ice (°C)? MM MgCl2 = 95.211 g/mol MM ice = 18.0148 g/mol
Answers
Answer:
-0.6⁰c
Explanation:
find the solution below
Calculate the change in entropy that occurs in the system when 1.24 mol of isopropyl alcohol (c3h8o) melts at its melting point (-89.5 ∘c). heat of fusion is 5.37 kj/mol.
Answers
Answer: The change in entropy that occurs in the system is 36.3 J/Kmol
Explanation:
Given : 1 mole of isopropyl alcohol gives heat = 5.37 kJ
Thus 1.24 moles of isopropyl alcohol gives heat = [tex]\frac{5.37}{1}\times 1.24=6.66 kJ[/tex]
To calculate the temperature , we use the equation:
[tex]\Delta S_f=\frac{\Delta H_{f}}{T}[/tex]
where,
[tex]\Delta S_f[/tex] = Entropy of fusion = ?
[tex]\Delta H_{f}[/tex] = enthalpy of fusion = 6.66 kJ/mol = 6660 J/mol (1kJ=1000J)
T = melting point = [tex]-89.5^0C=(273-89.5)K=183.5K[/tex]
[tex]\Delta S_f=\frac{6660J/mol}{183.5K}=36.3J/Kmol[/tex]
Thus the change in entropy that occurs in the system is 36.3 J/Kmol
PLZ HELP, GIVING BRAINLIEST!!
Which section of the graph represents the vaporization of the substance?
a. V
b. I
c. IV
d. lll
e. ll
Answers
Answer:
if multiple choice e. d. a. if not e.
Explanation:
The rate law for a reaction is rate = k[A]2. What is the overall order of this reaction, and which two varaibles, when graphed, will give a straight line for this reaction? A. first order, In[A]t versus t B. first order, 1/[A]t versus t C. second order, In[A]t versus t D. second order, 1/[A]t versus t
Answers
Answer:
D. second order, 1/[A]t versus t
Explanation:
Since the power of the concentration is 2 in the rate law, it is a second order reaction. Also, for a second order reaction, the variables that would yield a straight line when graphed are 1/[A]t versus t
Final answer:
The overall order of the reaction is 2 (second-order). A plot of 1/[A]t versus t will give a straight line for this reaction.
Explanation:
The overall order of the reaction is 2, which means it is a second-order reaction. This is because the rate law is rate = k[A]2, indicating that the reaction rate is proportional to the square of the concentration of A.
A plot of 1/[A]t versus t will give a straight line for this reaction. This is because the integrated rate law for second-order reactions has the form of the equation of a straight line: kt + [A]o = 1/[A]t. If the plot of 1/[A]t versus t is not a straight line, the reaction is not second order.
Fluorine gas reacts with aqueous iron (II) iodide to produce aqueous iron (II) fluoride and iodine liquid. What is the balanced chemical equation for this reaction? Group of answer choices F+ Fe2 I → Fe2 F + FeI2 → FeF2 + I 2 F + FeI2 → FeF2 + 2 I F2 + 2 Fe2I → 2 Fe2 F + I2
Answers
Final answer:
The balanced chemical equation for the reaction between fluorine gas and aqueous iron (II) iodide is F₂ + 2 FeI₂ → 2 FeF₂ + I₂, indicating the direct combination of these substances to form new products.
Explanation:
The reaction between fluorine gas and aqueous iron (II) iodide to produce aqueous iron (II) fluoride and iodine liquid can be represented as a balanced chemical equation. When writing a balanced chemical equation, it is vital to ensure that the number of atoms of each element on the reactants side is equal to the number of atoms of that element on the products side, adhering to the law of conservation of mass.
The correct balanced chemical equation for this reaction is:
F₂ + 2 FeI₂ → 2 FeF₂ + I₂
Here, one mole of fluorine gas reacts with two moles of iron (II) iodide to produce two moles of iron (II) fluoride and one mole of iodine.
CaCl2 (aq) + 2AgNO3 (aq) + Ca(NO3)2 (aq) + 2AGCI (s)
If 25.0 mL of a 2.00 M CaCl2 solution is used for the reaction
shown above, how many moles of chloride ions were involved
in the reaction? — moles
Answers
Answer:
There are 0.100 moles chlorine ions (Cl-) involved
Explanation:
Step 1: Data given
Volume of CaCl2 = 25.0 mL = 0.025 L
Molarity of CaCl2 = 2.00 M
Step 2: The balanced equation
CaCl2 (aq) + 2AgNO3 (aq) ⇆ Ca(NO3)2 (aq) + 2AgCI (s)
CaCl2 → Ca^2+ + 2Cl-
Step 3: Calculate moles CaCl2
Moles CaCl2 = molarity CaCl* volume
Moles CaCl2 = 2.00 M * 0.025 L
Moles CaCl2 = 0.050 moles
Step 4: Calculate moles chloride ions
CaCl2 → Ca^2+ + 2Cl-
For 1 mol CaCl2 we have 1 mol Ca^2+ and 2 moles Cl-
Moles Cl- ions = 2*0.050 moles
Moles Cl- ions = 0.100 moles
There are 0.100 moles chlorine ions (Cl-) involved
The reaction of 25.0 mL of a 2.00 M CaCl2 solution provides 0.100 moles of chloride ions for the reaction, based on the stoichiometry that shows each mole of CaCl2 gives two moles of chloride ions.
Explanation:To calculate how many moles of chloride ions were involved in the reaction where 25.0 mL of a 2.00 M CaCl2 solution is used, we must first understand the stoichiometry of the reaction:
CaCl2(aq) + 2AgNO3(aq) → Ca(NO3)2(aq) + 2AgCl(s)
From the balanced equation, we see that each mole of CaCl2 provides two moles of Cl− ions. To find the moles of CaCl2, we use the concentration and volume of the solution:
(2.00 moles/L) × (0.025 L) = 0.050 moles of CaCl2
Since there are two moles of Cl− for every mole of CaCl2, we multiply the moles of CaCl2 by 2:
0.050 moles × 2 = 0.100 moles of chloride ions
Which factors have the greatest effect on the rate of a chemical reaction between agno3 and cu
Answers
Answer:
Surface area of the reactants
Explanation:
If the reactants say Cu is in the powdered form, it reacts very quickly, otherwise the reaction will be delayed
Answer:
Surface Area and concentration
Explanation:
One of the most important factors that affect the rate of chemical reaction is the surface area of reactants. Surface area of reactants has to do with the number of particles of reactants exposed for reaction. In the reaction;
2AgNO3(aq) + Cu(s) -------> Cu(NO3)2(aq) + 2Ag(s), the most important factors affecting the rate of reaction are surface area of the solid copper metal and the concentration of the silver nitrate solution.
If copper turnings are used, the reaction will proceed faster than when a lump of copper is used. This is the effect of surface area in rate of reaction.
The higher the concentration of the solve nitrate solution, the faster the rate of reaction also. Hence the answer.
1. Every substance is either an element or a(n)______________.
(molecular, diatomic, compound,nonmetals)
2. A compound is either _________ or ionic in nature.
(molecular, diatomic, compound,nonmetals)
3. Most molecular compounds are composed of two or more _________.
(molecular, diatomic, compound,nonmetals)
4. Molecules consisting of two atoms are ____________ molecules.
(molecular, diatomic, compound,nonmetals)
5. The chemical formula of a molecular compound is a ________.
(low, molecular formula, high, structure, atoms)
6. Molecular compounds tend to have __________ melting and boiling points.
(low, molecular formula, high, structure, atoms)
7. Ionic compounds tend to have _________ melting and boiling points.
(low, molecular formula, high, structure, atoms)
8. A molecular formula shows how many _________ of each element a molecular contains, but it does not indicate the __________ of the molecule.
(low, molecular formula, high, structure, atoms)
Answers
The properties of elements and compounds.
Explanation:1. Every substance is either an element or a(n) compound.2. A compound is either molecular or ionic in nature.
3. Most molecular compounds are composed of two or more atoms.
4. Molecules consisting of two atoms are diatomic molecules.
5. The chemical formula of a molecular compound is a molecular formula.
6. Molecular compounds tend to have low melting and boiling points.
7. Ionic compounds tend to have high melting and boiling points.
8. A molecular formula shows how many atoms of each element a molecular contains, but it does not indicate the structure of the molecule.
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Fe2o3 + 3C —> 2Fe +3CO
Name the first reactant:
How many total atoms on the reactant side:
How many total atoms on the product side:
Answers
Answer:
1. iron(III) oxide
2. 8
3. 8
Explanation:
Know the naming rules
Reactants on left side products on right side
The first reactant is Fe2O3, with 5 total atoms on both sides.
Explanation:The first reactant in the equation Fe2O3 + 3C —> 2Fe + 3CO is Fe2O3, which represents iron(III) oxide.
On the reactant side, there are a total of 5 atoms (2 Fe atoms and 3 O atoms from Fe2O3, and 3 C atoms).
On the product side, there are a total of 5 atoms (2 Fe atoms from 2Fe and 3 C atoms from 3CO).
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A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?
Answers
Answer:
a
Explanation:
0.75
Answer:
the answer is a
Explanation:
I need both answers please.
Answers
Answer:
For the first one it is x=π/3+2πn and 2π/3+2πn and for the second one it is π/2
Explanation:
How might a lack of sunlight disrupt the food web?
Answers
Producers would die, and if producers died, consumers would die too. ... food chains show energy being transferred and food webs show organisms linked to each other.