Answer:
2 e⁻ + Cl₂(g) → 2 Cl⁻(aq)
Explanation:
Let's consider the following balanced redox equation.
2 I⁻(aq) + Cl₂(g) → 2 Cl⁻(aq) + I₂(aq)
We can identify 2 half-reactions:
Oxidation: 2 I⁻(aq) → I₂(aq) + 2 e⁻
Reduction: 2 e⁻ + Cl₂(g) → 2 Cl⁻(aq)
We can identify the second half-reaction as the reduction reaction because Cl₂ gains 2 electrons and its oxidation number decreases from 0 to 1-.
Answer:
A
Explanation:
It's A
Planets X and Y orbit each other in space. Which changes would have the greatest effect on increasing the gravitational attraction between the two planets?
Group of answer choices
Halving the mass of planet X and doubling the distance between the planets
Halving the mass of planet X and halving the distance between the planets
Doubling the mass of planet X and halving the distance between the planets
Doubling the mass of planet X and doubling the distance between the planets
Answer:
halving, the mass of planet X and halving the distance between the planets
The gravitational force of attraction is the fundamental force of the universe. Doubling the mass of planet X and halving the distance between the planets increases the gravitational attraction. The correct option is C.
What is gravitational attraction?The force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance between them. The formula of gravitational force is given as:
F = G m₁m₂ / r²
From the equation it is clear that the gravitational force increases with the increase in the mass and decreases with the increase in the distance between the objects. This law is true for each particle of matter, each particle of matter attracts every other particles.
Here doubling the mass of planet X and halving the distance between the planets increases the gravitational attractive force.
Thus the correct option is C.
To know more about gravitational attraction, visit;
https://brainly.com/question/29009418
#SPJ3
!!URGENT URGENT URGENT!! 100 POINTS!!!!!!!!!! If anyone gives me a wrong answer or any other bull you will be reported immediately. Did anyone do the Equilibrium lab 07.06 for Chemistry FLVS? If so I need it URGENTLY my DBA is tomorrow and I will change your writing to mine I'm very good at that I promise just PLEASE HELP ME!!!!!!!!!!
Answer:
is it the one where the objective was : To observe the changes in equilibrium when different components are added or taken away.
Which of the following correctly describes a weak acid?
O It completely ionizes.
0 It produces hydroxide ions.
O It partially ionizes.
O It produces hydronium ions that are less effective than those from strong acids.
Answer:
It partially ionizes
Explanation:
Higher tier) Weak acids only partially ionise in water. Only a small fraction of their molecules break into hydrogen ions when added to water.
HELP !!! WITH CHEMISTRY QUESTION
React with metal : property of acidic solutions.
PH > 7 : property of basic solutions.
Feels slippery: property of basic solutions
PH = 7: property of neutral solutions.
Tastes sour : property of acidic solutions.
more H+ ions than : property of acidic
OH- ions solutions.
OH- ions & H+ ions : property of neutral
present in equal solutions
amount
PH< 7 : property of acidic solutions.
conducts : property of acid solutions,
electricity property of basic solutions,
in Water property of acid & base
solutions
Tastes bitter : property of basic
solutions.
Using the balanced equation for the next few questions: 4 Fe(s) + 30 (9) - 2Fe2O3(s)
How many moles of Iron (11) Oxide would be produced by complete reaction of 0.15
moles of iron? (Be sure to show your work including the mole ratio you used)
Answer:
0.075 moles of iron oxide would be produced by complete reaction of 0.15 moles of iron.
Explanation:
The balanced reaction is:
4 Fe + 3 O₂ → 2 Fe₂O₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Fe: 4 molesO₂: 3 molesFe₂O₃: 2 molesYou can apply the following rule of three: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, 0.15 moles of Fe produce how many moles of Fe₂O₃?
[tex]moles of Fe_{2} O_{3} =\frac{0.15 moles of Fe*2 moles of Fe_{2} O_{3} }{4 moles of Fe}[/tex]
moles of Fe₂O₃= 0.075
0.075 moles of iron oxide would be produced by complete reaction of 0.15 moles of iron.
Please show your work if possible!
Answer:
54.93 g/mol
Explanation:
a) the element with symbol Mn is known as Manganese and I figured it out by looking at the periodic table.
b) I took a look at the periodic table again, and seen how much the atomic mass is and from there I observed:
Mn= 54.938 g/mol
rounded is 54.94 g/mol
2. Find the Volume of 3.00 mol of gas whose temperature is 60.0 C and whose pressure is 5.00 L.
3. Find the tempature of 1.50 mol of gas whose pressure is 4.00 atm and whose volume is 7.50L
4. Find the number of moles of a certain ideal gas whose volume, tempature and pressure are 3.00 L, 25.0, and 2.00 atm, respectively
Please show work I will give you a 5 star review and much points
Answer:
2. 16.4 L
3. 243.6K
4. 0.25mol
Explanation:
Using the ideal gas formula for the series of questions in this case, we have;
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
QUESTION 2:
V = ?
P = 5 atm
n = 3 mol
T = 60°C = 60 + 273 = 333K
PV = nRT
5 × V = 3 × 0.0821 × 333
5V = 82.02
V = 82.02/5
V = 16.4 L
QUESTION 3:
P = 4 atm
V = 7.5L
n = 1.5mol
T = ?
PV = nRT
4 × 7.5 = 1.5 × 0.0821 × T
30 = 0.123T
T = 30/0.123
T = 243.6K
QUESTION 4:
P = 2.00 atm
V = 3L
n = ?
T = 25°C = 25 + 273 = 298K
PV = nRT
2 × 3 = n × 0.0821 × 298
6 = 24.47n
n = 6/24.47
n = 0.25mol
A fertilized egg, or a
, is formed from the fusion of egg and sperm.
a deep underground cavern contains 2.24 x 10^6 L of methane (CH4) gas at a pressure of 15.0 atm and a temperature of 42 C. How many moles of methane does this natural gas deposit contain?
Answer:
This natural gas deposit contains 1,300,813.008 moles.
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
In this case:
P= 15 atmV=2.24*10⁶ Ln= ?R= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 42 C= 315 K (being 0 C= 273 K)Replacing:
15 atm* 2.24*10⁶ L= n*0.082 [tex]\frac{atm*L}{mol*K}[/tex]* 315 K
Solving:
[tex]n=\frac{15 atm* 2.24*10^{6}L }{0.082\frac{atm*L}{mol*K}*315 K}[/tex]
n=1,300,813.008 moles
This natural gas deposit contains 1,300,813.008 moles.
If you want to eat foods that contain less additives, what could you do?
A.
Stay away from packaged foods.
B.
Stay away from fresh fruits and vegetables.
Answer: the answer is a
Explanation:
always eat fresh fruits and veggiies.
when 32 grams of aluminum react, the actual yield is 105.5 grams, what is the percent yield?
Answer:
329.7%
Explanation:
Percent Yield = Actual Yield/ Theoretical Yield x 100%
Percent Yield = 105.5g/32 x 100% = 329.69 ≈ 329.7 %
6/10
For the following reaction:
CO + CuO - Cu + CO2
40 g of carbon oxide is reacted with 90 g of copper oxide.
Which is the limiting reactant?
(Molar mass of CO = 28 g/mol, molar mass of CuO = 80 g/mol)
a: CO2
b: CuO
c: CO
d: Cu
Answer:CuO
Explanation:
The limiting reagent is the reactant which usually determines when the reaction will stop. The limiting reagent depends on the mole ratio, not on the masses of the reactants present. Here the limiting reactant is .The correct option is B.
The reactant which is entirely used up in a reaction is defined as the limiting reagent. The exact quantity of the reactant which is needed to react with another element can be obtained from the reaction stoichiometry.
Here the masses are converted into moles as:
Moles of CO = 40 / 28 = 1.42
Moles of CuO = 90 / 80 = 1.12
Divide the moles obtained with the coefficients to find the limiting reagent. The smaller number is the limiting reagent.
So CuO is the limiting reagent.
Thus the correct option is B.
To know more about limiting reagent, visit;
https://brainly.com/question/26905271
#SPJ1
If it requires 75.0mL of 0.500M NaOH to neutralize 165.0 mL of an hcl solution what is the concentration of the hcl solution
Answer:
0.027 M HCl
Explanation:
The chemical equation of the neutralization is:
1 NaOH + 1 HCl -> 1 H2O + 1 NaCl
Because the ratio of NaOH and HCl is 1:1 you can use the M1V1=M2V2 formula.
(75 mL)(0.5 M NaOH) = (165 mL)(M HCl)
It requires 0.027 M HCl.
A compound formed with potassium and bromine that can detect blood in a stain by reacting with it to form distinctive crystals
Answer:
Potassium Bromide
Explanation:
not sure but i think thats it
What is an example of an ionic bond and why
Answer: An example is NaCl which exist as a ionic compound which has an ionic bond
Explanation: First of all , ionic bonds is the bond formed when a metal and a non metal reacts together.
in sodium chloride it contain sodium and chlorine IONS which are charged particles. the charged particles which are the ions are held together with these force of attraction hence creating such ionic bonds between them
so Na ions and the Cl ions are held together by their ions
Na± and the Cl±
HOPE THIS HELPS IF YOU NEED MORE EXPLANATION FELL FREE TO COMMENT IN THE COMMENT SECTION!!!
COULD SOMEONE PLEASE GIVE ME THE ANSWER FOR THIS NO BOTS PLEASEEE TODAY IS THE LAST DAY FOR MISSING WORK!!!!
Answer:
:D
Explanation:
8. D. All of the above
9. C. Mechanical weathering
10. D. All of the above
Answer:
8. D
9. A
10. D
Which of the following is a base?
a. AgO
b. HF
c. Ca(OH)2
d. NaCl
Answer:
c. Ca(OH)2
Explanation:
I took the test ;)
In chemistry, bases are substances that react with an acid to yield salt. Calcium hydroxide (Ca(OH)₂) is a base as it is a hydroxide of metal. Thus, option c is correct.
What are bases?Bases are solutes that react with acidic substances to produce water and salt. It comprises substances with hydroxide ion that reacts with hydrogen ion of acid to complete the neutralization reaction.
The carbonates, oxides, and hydroxides of metals make the base that has a pH range of below 7 up to 14. The alkalinity of the substance depends on the ability to release the hydroxide ions in the solution.
Calcium hydroxide (Ca(OH)₂) is a base as it contains OH⁻ ions that are characteristic of bases. On the other hand, NaCl is salt and HF is an acid.
Therefore, Ca(OH)₂ is a base.
Learn more about base here:
https://brainly.com/question/8069088
#SPJ5
What is the mole fraction of ethanol (C2H5OH) in a solution of 47.5 g of ethanol in 850 g of water?
Answer:
0.021
Explanation:
that's the answer because I just did an exam that included this question and then the miss explained to me why this was the answer, but don't worry am 100% sure the answer is 0.021 .
The mole fraction of ethanol in a solution of 47.5 g of ethanol in 850 g of water is 0.021.
How we calculate the mole fraction?Mole fraction of any substance present in solution will be calculted by dividing the moles of sample to the total moles of solution.
Moles will be calculated as:
n = W/M , where
W = given mass
M = molar mass
Moles of ethanol will be calculated as:
n = 47.5g / 46.07g/mol = 1.03 moles
Moles of water will be calculated as:
850g / 18g/mol = 47.18 moles
Total moles of solution = 1.03 + 47.18 = 48.21 moles
Mole fraction of ethanol in water will be calculated as:
mole fraction = 1.03 / 48.21 = 0.021
Hence, mole fraction is 0.021.
To know more about mole fraction, visit the below link:
https://brainly.com/question/25468666
A gas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen are in the cylinder
Answer:
Explanation:
The answer is 9.03 × 10²⁴ molecules.
Avogadro's number is the number of units (atoms, molecules) in 1 mole of substance.
Make the proportion.
6.02 × 10²³ molecules per 1 mol
x per 15 mol
6.02 × 10²³ molecules : 1 mol = x : 15 mol
x = 6.02 × 10²³ molecules * 15 mol * 1 mol
x = 90.3 × 10²³ molecules
x = 9.03 × 10 × 10²³ molecules
x = 9.03 × 10²³⁺¹ molecules
x = 9.03 × 10²⁴ molecules
2C2H2 + 5O2 → 4CO2 + 2H2O
Which of the following statements would be correct if one mole of C2H2 was used in this reaction? (5 points)
a
One mole of oxygen was used in this reaction.
b
Five moles of oxygen were used in this reaction.
c
Four moles of carbon dioxide were produced from this reaction.
d
Two moles of carbon dioxide were produced from this reaction.
Answer:
d. Two moles of carbon dioxide were produced from this reaction
Explanation:
The given chemical reaction can be written as follows;
2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O
From the above chemical reaction, we have;
Two moles of C₂H₂ reacts with five moles of O₂ to produce four moles of CO₂ and two moles of H₂O
We have;
One mole of C₂H₂ will react with two and half moles of O₂ to produce two moles of CO₂ and one mole of H₂O
Therefore, in the above reaction, when one mole of C₂H₂ is used, two moles of CO₂ will be produced.
A 35 L tank of oxygen is at 315 K with an internal pressure of 190 atmospheres. How
many moles of gas does the tank contain?
Answer:
600.7 moles
Explanation:
Applying,
PV = nRT................... Equation 1
Where P = Pressure of oxygen, V = Volume of oxygen, n = number of moles, R = molar gas constant, T = Temperature.
make n the subject of the equation
n = PV/RT............... Equation 2
From the question,
Given: P = 190 atm, V = 35 L, T = 135 K
Constant: R = 0.082 atm.dm³/K.mol
Substitute these values into equation 2
n = (190×35)/(135×0.082)
n = 600.7 moles of xygen
How many atoms of O are required to form 2 moles of H2SO4?
Answer:
4 oxygen atoms
Explanation:
Answer: One sulphuric acid ( H2SO4 ) molecule has 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.
What molecule is needed to digest milk?
Answer:
For example, the sugar found in milk is called lactose. With the aid of the enzyme, lactase, the substrate, lactose, is broken down into two products, glucose and galactose. People who don't make enough lactase have trouble digesting milk products and are lactose intolerant.
Which is NOT a way to accelerate an object? *
Explain to the people of Westfield what is in their water.
The presence of rust in the water of Westfield is the reason for the change in colour.
Reason for reddish colour of waterThe water of Westfield has reddish-brown substance. This reddish brown substance in the water is the rust which formed due to the chemical reaction between the iron pipes and the fertilizer substance present in the water.
Due to this reaction, the colour of Westfield's water is different from normal type of water so we can conclude that the presence of rust in the water of Westfield is the reason for the change in colour.
Learn more about rust here: https://brainly.com/question/1477535
Which reaction represents natural nuclear
decay?
A) 4N+ He → 30 H
B) KC1O3 + K+ + C103
C) 335 U → He + 331 Th
D) H+ + OH- + H2O
Answer:
answer is d
i hope this helps you
The reaction that represents natural nuclear decay is 335 U → He + 331 Th, i.e., option C.
What is a nuclear decay reaction?Nuclear reactors continue to operate by enclosing the nuclear fission process.
Even after fission has stopped, radioactive decay of fission products and transuranic elements formed in a reactor produces heat.
Fission reactions can be moderated in order to increase fission or unmoderated in order to breed more fuel.
The reaction that represents natural nuclear decay is
335 U → He + 331 Th.Thus, the correct option is C.
For more details regarding nuclear decay reaction, visit:
https://brainly.com/question/10757669
#SPJ2
How far above earth is the international space station
Answer:
248 miles
Explanation:
At an average altitude of 248 miles (400 kilometers) above Earth, the space station is the third brightest object in the sky.
All of the following describe the unique role of water except-
Water is polar and cannot dissolve nonpolar compounds such as oil
Water is considered a universal solvent because it can dissolve more substances than any other liquid.
Water is nonpolar and can dissolve nonpolar compounds such as oil
Water has the ability to form hydrogen bonds
I can't seem to figure out how to set up charts so there's just a screenshot of the question in the file attached :) Thank's for any help!!
Answer:
See Explanation
Explanation:
Volume of base used = (31.79 - 1.6) + (32.12 - 0.98) + (42.87 -13.21)/3 = 30.34 cm3
Volume of acid used = (24.86 - 0.42) + (24.11 - 0.11) + (27.67 -3.42)/3 = 24.23 cm3
For trial 1= number of moles of HBr = 24.44/1000 * 0.3 = 0.0073 moles
For trial 2= number of moles of HBr = 24/1000 * 0.3 = 0.0072 moles
For trial 3= number of moles of HBr = 0.0089 moles
HBr(aq) + KOH(aq) -----> KBr(aq) + H2O(l)
One mole of base is required to neutralize one mole of acid.
From CAVA/CBVB =nA/nB
CAVAnB = CBVBnA
CB = CAVAnB/VBnA
CB = 0.3 * 24.23 * 1/30.34 * 1
CB = 0.24 moldm-3
number of moles of KOH = concentration * volume
number of moles = mass/molar mass
molar mass of KOH = 56 g/mol
mass/56 = 0.24 * 30.34/1000
mass = 0.24 * 30.34/1000 * 56
mass =0.408 g of KOH
A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature
A gas occupies 900.0 mL at a temperature of 27.0°C. What is the volume if the temperature is 105°C ?
Explanation:
[tex] \frac{V _{1} }{T _{1}} = \frac{V _{2} }{T _{2}} \\ \frac{(900)}{(27 + 273)} = \frac{V _{2}}{(105 + 273)} \\ V _{2} = \frac{340200}{300} \\ V _{2} = 1134 \: ml[/tex]