Answer:
2 N2O(g) + 3 O2(g) --> 4 NO2(g)
Explanation:
this is the chemical reaction balanced, if that was ur question.
QUESTION 62
Which of the following pH values represents the highest concentration of H30+ ions?
O pH 5.4
O pH 7.0
O pH 8.7
O All of the above have the same concentration of hydronium ions
O cannnot be determined with the given information
Answer:
5.4
Explanation:
The lower the pH the more H3o+ ions there are
What is the molarity of a solution composed
of 4.27 g of potassium iodide (KI) dissolved in
enough water to make 0.304 L of solution?
Answer in units of M.
Answer:
0.0845 M
Explanation:
First we convert 4.27 grams of potassium iodide into moles, using its molar mass:
Molar Mass of KI = 166 g/mol4.27 g ÷ 166 g/mol = 0.0257 molNow we calculate the molarity of the solution, using the number of moles and the given volume:
Molarity = moles / litersMolarity = 0.0257 mol / 0.304 L = 0.0845 MHello!
please help me!
The nerve gas phosgene decomposes according to COC12(g) - CO(g) + Cl2(g), K = 0.32 at 1000 K. If
the initial concentration of phosgene is 0.015 M. what are the equilibrium concentrations of all gases?
Answer:
[tex][CO]=[Cl_2]=0.01436M[/tex]
[tex][COCl_2]=0.00064M[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction at equilibrium, we can set up the equilibrium expression as follows:
[tex]K=\frac{[CO][Cl_2]}{[COCl_2]}[/tex]
Which can be written in terms of x, according to the ICE table:
[tex]0.32=\frac{x^2}{0.015M-x}[/tex]
Thus, we solve for x to obtain that it has a value of 0.01436 M and therefore, the concentrations at equilibrium turn out to be:
[tex][CO]=[Cl_2]=0.01436M[/tex]
[tex][COCl_2]=0.015M-0.01436M=0.00064M[/tex]
Regards!
bahobilat at dakobilat
Answer:
sorry i didn't understand your question can you explain me your question have a good day hope its helps you ☺
how do i balance the first chemical reaction above?? plz plz help
Answer:
2K +F₂→ 2KF
Explanation:
When we balance an equation, we are trying to ensure that the number of atoms of each element is the same on both sides of the arrow.
On the left side of the arrow, there is 1 K atom and 2 F atoms. On the right, there is 1 K and 1 F atom.
Since the number of K atoms is currently balanced, balance the number of F atoms.
K +F₂→ 2KF
Now, that the number of F atoms is balanced on both sides, check if the number of K atoms are balanced.
Left
K atoms: 1
F atoms: 2
Right
K atoms: 2
F atoms: 2
The number of K atoms is not balanced.
2K +F₂→ 2KF
Left
K atoms: 2
F atoms: 2
Right
K atoms: 2
F atoms: 2
The equation is now balanced.
explaining how is it day time in the UAE and night time in the USA
Because of their different longitude.
Suppose the galvanic cell sketched below is powered by the following reaction: (s)(aq)(aq)(s) Write a balanced equation for the half-reaction that happens at the cathode of this cell. Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is E1 made? Of what substance is E2 made? What are the chemical species in solution S1? What are the chemical species in solution S2?
Answer:
Hello the required Image related to your question is missing attached below is the missing Image
answer :
a) Ni²⁺(aq) + 2e⁻ ⇒ Ni(s)
b) Fe(s) ⇒ Fe²⁺(aq) + 2e⁻
c) Fe (s)
d) Ni ( s )
e) Fe²⁺(aq) and SO⁻²₄ (aq)
f) Ni²⁺(aq) and SO⁻²₄(aq)
Explanation:
a) Balanced equation for the half-reaction at the cathode of the cell
Ni²⁺(aq) + 2e⁻ ⇒ Ni(s)
b) Balanced equation for half reaction at the anode of the cell
Fe(s) ⇒ Fe²⁺(aq) + 2e⁻
c) E1 is made of Fe (s)
d) E2 is made of Ni ( s )
e) chemical species in solution S1 = Fe²⁺(aq) and SO⁻²₄ (aq)
f) Chemical species in solution S2 = Ni²⁺(aq) and SO⁻²₄(aq)
Explain the phenomenon of diffussion.
Answer:
the movement of particles from a higher consentration to a lower consentration through a mechanical support.
Explanation:
Students performed an investigation on how aluminum cans taken to a recyle center were able to be reused. They found out an aluminum can undergoes which type of change?
a physical change because the can is heated
a chemical change because new metal is formed
a physical change because the material remains the same
a chemical change because an old can is changed into a new can
Answer:
The correct answer is - a physical change because the material remains the same.
Explanation:
A chemical change is the change that results in the formation of the new element or the substance whereas the physical change remains the same material or substance even after the change.
The physical change can be a change in density, size, shape, or volume, and other properties. In the recycling of the aluminum can the material remain the same only shape or size of the aluminum change order to reuse.
Answer:
its D i promise
Explanation:
BONUS QUESTION
you are stuck with a problem. You need to measure pH of a solution known to be made from a metal hydroxide, but you don't have a meter or any indicators. You do happen to have some lead(II) nitrate that is soluble, and you remember that lead (II) hydroxide is insoluble. You add some to 1 liter of your own unkown solution and a precipitate forms. You add more unttil the precipitate stops forming and then a bit more just in case. After you filter and dry the precipitate, you have 3.81 grams of it. What was the approximate pH of the original solution?
*This is just a bonus question but I'm very confused on it so any help would be appreciated*
Answer:
pH = 12.5
Explanation:
The reaction that takes place is
2OH⁻(aq) + Pb⁺²(aq) → Pb(OH)₂(s)The OH⁻ species come from the metal hydroxide of the solution, and Pb(OH)₂ is the precipitate.
Now we convert 3.81 grams of Pb(OH)₂ into moles, using its molar mass:
3.81 g ÷ 241.12 g/mol = 0.0158 mol Pb(OH)₂Now we convert 0.0158 Pb(OH)₂ moles into OH⁻ moles, using the stoichiometric coefficients of the reaction:
0.0158 mol Pb(OH)₂ * [tex]\frac{2molOH^-}{1molPb(OH)_2}[/tex] = 0.0316 mol OH⁻With the given concentration (1 L), we calculate [OH⁻]:
[OH⁻] = 0.0316 mol / 1 L = 0.0316 MThen we calculate the pOH of the solution:
pOH = - log[OH⁻] = 1.5And finally we calculate the pH:
pH = 14 - pOHpH = 12.5Who would require more Calories to maintain their weight, and why? Person A: 6
feet tall, 190 lbs, exercises for 30 minutes every day. Person B: 5 feet 6 inches tall,
150 lbs, exercises 10 minutes every day. *
An electromagnet can be made by wrapping wire around which object?
Answer: A wire the first answer gl on the quiz
Why does the standard model of the universe need to be change?
Explanation:
The standard model of particle physics is a relativistic theory of quantum fields developed between 1970 and 1973 [citation needed] based on the ideas of unification and symmetries [1] that describes the fundamental structure of matter and vacuum considering the elementary particles as irreducible entities whose kinematics is governed by the four known fundamental interactions (except for gravity, whose main theory, general relativity, does not fit the mathematical models of the quantum world). The word "model" in the name comes from the 1970s when there was not enough experimental evidence to confirm the model. [1] To date, almost all experimental tests of the three forces described by the standard model are in agreement. with their predictions. However, the standard model falls short of being a complete theory of fundamental interactions due to several unresolved issues.
When was the "Permian Era"?
Answer:
298.9 million years ago - 251.902 million years ago
Explanation:
It might be in the 2011 Earth Science Review Packet so maybe go check that out
Q13 Which compound has a boiling point that is influenced by hydrogen bonding?
A CH3CHO
B CH3OCH3
C HCO2H
D HCO2CH3
Answer:
[tex]A. \: \: CH _{3}CHO[/tex]
ethanal
This is because hydrogen is bonded with oxygen atom which is highly electronegative.
A city along the coast of the Atlantic Ocean experiences a seasonal high of 76°F in the summer. The city experiences a seasonal low of 23°F in the winter.
Another city is 60 miles inland and at the same latitude and elevation. This city will probably experience _______ summer highs and _______ winter lows.
Answer:
Warmer and cooler
Explanation:
The city which is along the coast of the Atlantic Ocean may experience a seasonal high of 76°F in summer. The city also has a seasonal low of 23°F in the winter. Another city is 60 miles inland and at the same latitude and elevation, this means that the city has cool winter lows and a warmer supper high.Answer:
warmer and cooler i just did it on study island
Explanation:
Need help on this one
Answer:
Explanation:convection
Which of the following statements sounds correct to you?
a) There are different definitions of acids and bases
b) Vegetables are acidic
c) Vegetables are alkaline
A method called "acid-alkaline balance" affects your health. The pH determines the acidity or alkalinity of a substance and is measured at a 0 to 14 scale.
The more acidic the fluid is the lower the pH. The higher the pH the more the solution will be alkaline (or base). If a mixture is within the range neither acid nor alkaline it has a neutral pH of 7 since both acidic or basic are commonly vegetable products. Note that trend of food in the body is acidic or alkaline and has nothing to do with its actual pH.Therefore the final answer is "Option a".
Learn more:
brainly.com/question/4399761
A sample of N2 has a volume of 616 mL at 68 °C. What will be its volume at -17 °C?
Answer:
462.5ml
Explanation:
Using Charle's law equation;
V1/T1 = V2/T2
Where;
V1 = initial volume (ml)
V2 = final volume (ml)
T1 = initial temperature (K)
T2 = final temperature (K)
Based on the information provided in this question;
V1 = 616ml = 616/1000 = 0.616L
V2 = ?
T1 = 68°C = 68 + 273 = 341K
T2 = 17 °C = -17 + 273 = 256K
V1/T1 = V2/T2
0.616/341 = V2/256
Cross multiply
341 × V2 = 256 × 0.616
341V2 = 157.69
V2 = 157.69/341
V2 = 0.4625 L or 462.5ml
Which reaction results in the GREATEST increase in entropy?
A)
(diamond)— Сgraphite)
B)
CO2(s) — CO2(g)
C)
H2O(s) — H20(5)
D)
2H2(g) + O2(g) → 2H2O(1)
What is the [H+] if [OH-] = 1 x 10-5 M?
explain how dna which is 6 feet long, can be stored in the nucleus of a tiny human cell.
Answer:
Packed inside the nucleus of every human cell are nearly 6 feet of DNA, which is divided into 46 individual molecules, one for each chromosome and each about 1.5 inches long. Packing all this material into a microscopic cell nucleus is an extraordinary feat of packaging.
Explanation:
Packed inside the nucleus of every human cell are nearly 6 feet of DNA, which is divided into 46 individual molecules, one for each chromosome and each about 1.5 inches long. Packing all this material into a microscopic cell nucleus is an extraordinary feat of packaging. For DNA to function, it can't be crammed into the nucleus like a ball of string. Instead, it is combined with proteins and organized into a precise, compact structure, a dense string-like fiber called chromatin.
(hope this helps can i plz have brainlist :D hehe)
The entropy change for a real, irreversible process is equal to:______.
a. the entropy change for a theoretical reversible process with the same initial and final states.
b. equal to the entropy change for the same process performed reversibly ONLY if the process can be reversed at all.
c. zero.
d. impossible to tell.
Answer:
The entropy change for a real, irreversible process is equal to zero.
The correct option is 'c'.
Explanation:
Lets look around all the given options -:
(a) the entropy change for a theoretical reversible process with the same initial and final states , since the entropy change is equal and opposite in reversible process , thus this option in not correct.
(b) equal to the entropy change for the same process performed reversibly ONLY if the process can be reversed at all. Since , the change is same as well as opposite too . Therefore , this statement is also not true .
(c) zero. This option is true because We generate more entropy in an irreversible process. Because no heat moves into or out of the surroundings during the procedure, the entropy change of the surroundings is zero.
(d) impossible to tell. This option is invalid , thus incorrect .
Hence , the correct option is 'c' that is zero.
Answer: the entropy change for a theoretical reversible process with the same initial and final states
Calculate the change in enthalpy for the following reaction:
4NH3 (g) + 7O2 (g) --> 4 NO2 (g) + 6 H20 (l)
AH NH3= -46
AH4NO2= +34
AH+H200=-286
AH reaction= ____ kJ/mol
Is this reaction endothermic or exothermic?
Answer:
-1396 kJ
Explanation:
Let's consider the following balanced equation.
4 NH₃(g) + 7 O₂(g) ⇒ 4 NO₂(g) + 6 H₂O(l)
We can calculate the standard change in enthalpy for the reaction (ΔHr) using the following expression.
ΔHr = ∑ np × ΔHf(p) - ∑ nr × ΔHf(r)
where,
n: molesΔHf: standard enthalpies of formationp: productsr: reactantsΔHr = 4 mol × ΔHf(NO₂(g)) + 6 mol × ΔHf(H₂O(l)) - 4 mol × ΔHf(NH₃(g)) - 7 mol × ΔHf(O₂(g))
ΔHr = 4 mol × (34 kJ/mol) + 6 mol × (-286 kJ7mol) - 4 mol × (-46 kJ/mol) - 7 mol × (0 kJ/mol) = -1396 kJ
A solution is prepared by dissolving 51 g of salt in 340 g of
water. What is the mass percent of salt?
Answer:
okķkkkkkkkkkkkkkkkkkkkkk.I don't know the answer. GIVE THANKS
Manganese is a transition metal. Consider the isotope: Mn-53. How many protons are in an atom of Mn-53 if the atom has a charge of 5?
Answer:
25
Explanation:
Isotopes of an element are the same element with different mass numbers but the same atomic number or the number of protons.
we know that in a balanced atom
Number of electrons = Number of protons = Atomic number
Atomic number (z) of manganese = 25
For Mn+5, the number of protons remains the same = 25
However, the number of electrons on Mn+5 = 21
Answer: 25
Explanation:
How many moles of solute are in a 125mL of a 5M HCl solution
Answer:
3.4
373.4
.45.=2
46.=3 .6.2=4
why is FCN linear and not bent
Answer:
The key difference between linear and bent molecules is that linear molecules have atoms bonded to each other, forming a straight molecule, whereas bent molecules have atoms arranged in a bend-shape with an angle. The terms linear molecules and bent molecules describe the shapes of different molecules.
Explanation:
bcz of molecules ............
5. 16.3 g of NaCl is dissolved in water to make 1.75 L of solution. What is the molarity of this solution? A 0.159 M B 0.278 M C 9.31 M D 33.4 M
Answer: The molarity of this solution is 0.159 M.
Explanation:
Given: Mass of solute = 16.3 g
Volume = 1.75 L
Number of moles is defined as the mass of substance divided by its molar mass.
Hence, moles of NaCl (molar mass = 58.44 g/mol) ar calculated as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{16.3 g}{58.44 g/mol}\\= 0.278 mol[/tex]
Molarity is the number of moles of a substance present in a liter of solution.
So, molarity of the given solution is calculated as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.278 mol}{1.75}\\= 0.159 M[/tex]
Thus, we can conclude that the molarity of this solution is 0.159 M.
Please solve this fast pleasee i will make u the brainliest
I – FILL IN THE BLANKS:-
1. _____________plastics can be melted by heating and thereafter moulded into desired
shape.
2. Melamine and Bakelite are examples of____________________________.
3. _________________ absorbs sweat.
4. ______________are used for making toothbrush bristles.
5. _____________type of plastic is used for making grocery bags.
6. _____________type of plastic is used for making microwave cooking containers.
7. __________ fibres are obtained from plant and animals.
8. Synthetic fibres are acquired from __________ products.
9. Polythene is the polymer of __________.
10. __________ was the first artificially manufactured fibre.
11. Polyesters are extremely __________ and __________.
12. __________ is used as an alternative for expensive, warm cashmere clothes.
13. The polymer cellulose is made up of a large number of __________ units.
14. Silk fibre is obtained from __________ whereas artificial silk is obtained by chemical
treatment of __________
15. Polythene which is used to make polythene bags is an example of a __________.
16. Plastics do not react with _______________ and ____________________.
17. Plastics are generally ______________-____ than metals.
18. __________ is a special plastic on which oil and water do not stick.
19. We should always remember the 5R principle: __________, __________, __________,