For two acids of equal concentration, the stronger acid has-
At which temperature is water in its gas phase (water vapor)?
Group of answer choices
-40
40
140
What is the ph of a HCl solution with a concentration of 2.51x10^-5M
Answer:
pH = 4.6
Explanation:
As hydrochloric acid (HCl) is a strong acid, the molar concentration of H⁺ species is the same as the molar concentration of the HCl solution. In other words:
[H⁺] = 2.51x10⁻⁵ MWith the information above in mind we can calculate the pH:
pH = -log[H⁺]pH = -log(2.51x10⁻⁵ M)pH = 4.6In the acetylene torch, acetylene gas (C2H2) burns in oxygen to produce carbon dioxide water and energy. How many moles of CO2 are formed from the reaction with 1.20 moles of C2H2?
Given the following equation
2C2H2(g) + 502(g) = 4CO2(g) + 2H2O(g)
Answer: 2.40 moles of [tex]CO_2[/tex] will be formed in the reaction.
Explanation:
Given values:
Moles of [tex]C_2H_2[/tex] = 1.20 moles
The given chemical equation follows:
[tex]2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O[/tex]
By the stoichioemetry of the reaction:
If 2 moles of [tex]C_2H_2[/tex] produces 4 moles of carbon dioxide
Then, 1.20 moles of [tex]C_2H_2[/tex] wil produce = [tex]\frac{4}{2}\times 1.20=2.40mol[/tex] of carbon dioxide
Hence, 2.40 moles of [tex]CO_2[/tex] will be formed in the reaction.
Given the following reaction:
2 ZnS(s) + 3 O2(g) → 2 ZnO(s) + 2 SO2(g) ΔH = -927.54 kJ
How much energy would be released if 50.0g of ZnS(s) is reacted with 30.0g of O2(g)?
Answer: -354.78 kJ of energy would be released for a given amount.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
For Zinc:
Mass of zinc = 50.0 g
Molar mass of zinc = 65.38 g/mol
Plugging values in equation 1:
[tex]\text{Moles of Zn}=\frac{50.0g}{65.38g/mol}=0.765mol[/tex]
For oxygen gas:
Mass of oxygen gas = 30.0 g
Molar mass of oxygen gas = 32 g/mol
Plugging values in equation 1:
[tex]\text{Moles of }O_2=\frac{30.0g}{32g/mol}=0.9375mol[/tex]
The chemical equation follows:
[tex]2ZnS(s)+3O_2(g)\rightarrow 2ZnO(s)+2SO_2(g);\Delta H=-927.54kJ[/tex]
By the stoichiometry of the reaction:
If 2 moles of zinc reacts with 3 moles of oxygen gas
So, 0.765 moles of zinc will react with = [tex]\frac{3}{2}\times 0.765=0.51mol[/tex] of oxygen gas
As the given amount of oxygen gas is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.
Thus, Zn is considered a limiting reagent because it limits the formation of the product.
By the stoichiometry of the reaction:
If 2 moles of zinc are releasing 927.54 kJ of energy
So, 0.765 moles of zinc will react with = [tex]\frac{927.54}{2}\times 0.765=354.78kJ[/tex] of energy
Hence, -354.78 kJ of energy would be released for a given amount.
What is the percentage of oxygen in C6H1206?
number of oxygen : 6
number of whole atoms in molchol :
6 + 12 + 6 = 24
Percentage of oxygen = n o o / n o a i m × 100
P o o = 6 / 24 × 100
P o o = 1/4 × 100
P o o = % 25
[tex]\huge{ \mathrm{ \underline{ Answer} \: \: ✓ }}[/tex]
Mass of elements in [tex]\mathrm{C_6H_{12}O_6}[/tex] are :
O = [tex]16 u[/tex]C = [tex]12 u[/tex]H =[tex] 1 u[/tex]Total mass of [tex]\mathrm{C_6H_{12}O_6}[/tex] is :
[tex](12u \times 6) + (1u \times 12) +( 16u \times 6)[/tex][tex]72u + 12u + 96u[/tex][tex]180u[/tex]Total Mass of Oxygen in [tex]\mathrm{C_6H_{12}O_6}[/tex] is :
[tex]16u \times 6[/tex][tex]96u[/tex]Percentage of Oxygen by mass in [tex]\mathrm{C_6H_{12}O_6}[/tex] is :
[tex] \boxed{ \frac{total \: \: mass \: \: of \: \: oxygen}{total \: \: mass \: of \: glucose } \times 100 } [/tex]
[tex] \dfrac{96u}{180u} \times 100[/tex][tex] \dfrac{32u}{3u} \times 5[/tex][tex] \dfrac{160u}{3u} [/tex][tex]53.33 \: \%[/tex]_____________________________
[tex]\mathrm{ ☠ \: TeeNForeveR \:☠ }[/tex]
A sample of dry gas is found to occupy 3.650 L at 22.0°C and 740.0 mmHg. How many moles of gas are present?
will mark brainliest
Answer:
0.147
Explanation
PV/RT
a solar eclipse only happens during a Moon
A. New
B. Crescent
C. Gibbous
D. Full
Answer:
A. New
Explanation:
What is the maximum number of moles of NaCl that can be produced from the reaction of 5.6 mol Na and 4.7 mol CI2?
2Na + Cl2 —> NaCl
What is the limiting reactant?
What is the excess reactant?
Answer:
Explanation:
Na + Cl2 —> NaCl
Determine the number of molecules of C2CI4 contained in 73.1g of C2CI4
Answer:
2.35x10²³ molecules of C2Cl4 are present
Explanation:
To solve this question we must convert, as first, the mass of C2Cl4 to moles using its molar mass (C2Cl4 = 165.83g/mol). Then, using Avogadro's number we can find the number of molecules:
Moles C2Cl4:
73.1g * (1mol / 165.83g) = 0.441 moles C2Cl4
Molecules:
0.441 moles C2Cl4 * (6.022x10²³molecules / 1mol) =
2.35x10²³ molecules of C2Cl4 are presentA solid sample is hit with a hammer and breaks into jagged, irregular shards. What type of solid was it? A) molecular solid b) network solid c) ionic solid d)metallic solid
I honestly don't know the answer
concentrated phosphoric acid is90% H3PO4 by mass and the remaining mass is water. The molarity of H3PO4 is 12.2M at temperature (a) what volume (mL) of this solution is needed to make a 1.00L solution of 1.00M phosphoric acid?
Answer:
82.0 mL
Explanation:
Step 1: Given data
Concentration of concentrated acid (C₁): 12.2 MVolume of concentrated acid (V₁): ?Concentration of dilute acid (C₂): 1.00 MVolume of dilute acid (V₂): 1.00 LStep 2: Calculate the required volume of the concentrated acid
We want to prepare a dilute solution from a concentrated one. We can calculate the volume of the concentrated acid using the dilution rule.
C₁ × V₁ = C₂ × V₂
V₁ = C₂ × V₂ / C₁
V₁ = 1.00 M × 1.00 L / 12.2 M = 0.0820 L = 82.0 mL
Predict whether S for each reaction would be greater than zero, less than zero, or too close to zero to decide.
a. H2(g)+Cl2(g)→2HCl(g)
b. 2H2O2(l)→2H2O(l)+O2(g)
c. CO(g)+3H2(g)→CH4(g)+H2O(g)
d. CH4(g)+2O2(g)→CO2(g)+2H2O(g)
e, 2SO3(g)→2SO2(g)+O2(g)
Answer:
a. Too close to zero.
b. Higher than zero.
c. Lower than zero.
d. Too close to zero.
e. Higher than zero.
Explanation:
The entropy of a reaction, S, is positive when the disorder of the system increases. That is:
Solid → Liquid → Gas S>0
When S<0, the disorder decreases:
Gas → Liquid → Solid S<0
Thus:
a. H2(g)+Cl2(g)→2HCl(g)
2 moles of gas produce 2 moles of gas:
S too close to zero.
b. 2H2O2(l)→2H2O(l)+O2(g)
A liquid is producing a gas:
S>0
c. CO(g)+3H2(g)→CH4(g)+H2O(g)
4 moles of gas produce 2 moles of gas, the disorder decreases:
S<0
d. CH4(g)+2O2(g)→CO2(g)+2H2O(g)
3 moles of gas produce 3 moles of gas:
S too close to zero.
e, 2SO3(g)→2SO2(g)+O2(g)
2 moles of gas produce 3 moles of gas.
S>0
What answer is it and how ? please help !!!!!! ill mark brainlyest if right
Answer:
The answer is B
Brainliest please!
It is July in Georgia and you buy a balloon at the grocery store for a friend's birthday.
It is cold inside in the store, but when you go outside, it is very hot. What happens
to the volume of the balloon as the temperature changes from cold to hot?
Help meee
Answer:
it is cold inside in the store
Ammonia will decompose into nitrogen and hydrogen at high temperature. An industrial chemist studying this reaction fills a 5.0L flask with 4.5 atm of ammonia gas, and when the mixture has come to equilibrium measures the amount of nitrogen gas to be 1.1 atm. Calculate the pressure equilibrium constant for the decomposition of ammonia at the final temperature of the mixture. Round your answer to 2 significant digits.
Answer:
Kp = 7.4727
Explanation:
Let's write the balanced equilibrium reaction:
2NH₃ <-------> N₂ + 3H₂ Kp = ??
Now, if we want to calculate the Kp, we need to write an ICE chart with this reaction, which is the following:
2NH₃ <-------> N₂ + 3H₂
I. 4,5 0 0
C. -2x +x +3x
E. 4,5-2x x 3x
According to this chart, the Kp expression should be:
Kp = (PH₂)³ * (PN₂) / (PNH₃)² (1)
The value of x, we already know it because the problem states that the amount of nitrogen gas is 1.1 atm, so replacing this value into (1) we have:
Kp = (3*1.1)³ * (1.1) / (4.5 - (2 * 1.1))²
Kp = 39.5307 / 5.29
Kp = 7.4727Hope this helps
12 moles of sodium into grams
Answer:
12 moles sodium= 275.87724000000003 grams
Explanation:
1 moles sodium = 0.043497607849056.
determine the maximum amount of NaN03 that was produced during the experiment. Explain how you determined the amount
Answer:
9 moles of NaNO3 is obtained
Explanation:
The balanced chemical reaction equation for the reaction is;
Al(NO3)3 + 3NaCl-------> 3NaNO3 + AlCl3
Now, we have to determine the limiting reactant. The limiting reactant yields the least amount of NaNO3.
1 mole of Al(NO3)3 yields 3 moles of NaNO3
4 moles of Al(NO3)3 yields 4 * 3/1 = 12 moles of NaNO3
Also,
3 moles of NaCl yields 3 moles of NaNO3
9 moles of NaCl yields 9 * 3/3 = 9 moles of NaNO3
Hence, NaCl is the limiting reactant and 9 moles of NaNO3 is obtained.
9 moles of NaNO₃ is obtained.
Balanced chemical reaction:
[tex]Al(NO_3)_3 + 3NaCl-----> 3NaNO_3 + AlCl_3[/tex]
From the reaction, it is seen that the limiting reactant yields the least amount of NaNO₃.
1 mole of Al(NO₃)₃ yields 3 moles of NaNO₃
4 moles of Al(NO₃)₃ yields 4 * 3/1 = 12 moles of NaNO₃
Also,
3 moles of NaCl yields 3 moles of NaNO₃
9 moles of NaCl yields 9 * 3/3 = 9 moles of NaNO₃
Hence, NaCl is the limiting reactant and 9 moles of NaNO₃ is obtained.
Find more information about Balanced chemical reaction here:
brainly.com/question/15355912
What volume will 50.2 grams of CO2 occupy at STP?
Answer:
the volume of 50.2 grams of co2
would simply be
50.2÷48
When 1 mol of a nonvolatile, nondissociating solute is dissolved in 3 mol of volatile solvent, the ratio of vapor pressure of the solution to that of the pure solvent (at the same temperature) is approximately:________
Answer:
[tex]\frac{P_{solution}}{P_{solvent}^{vap}} =0.75[/tex]
Explanation:
Hello there!
In this case, since the solvation of a nonvolatile-nondissociating solute in a volatile solvent is modelled via the Raoult's law:
[tex]P_{solution}=x_{solvent}P_{solvent}^{vap}[/tex]
Thus, we can calculate the ratio of the vapor pressure of the solution to that of the pure solvent, mole fraction, as shown below:
[tex]x_{solvent}=\frac{P_{solution}}{P_{solvent}^{vap}} =\frac{n_{solvent}}{n_{solute}+n_{solvent}}[/tex]
Thus, we plug in the moles of solvent and solute to obtain:
[tex]\frac{P_{solution}}{P_{solvent}^{vap}} =\frac{3}{3+1}\\\\ \frac{P_{solution}}{P_{solvent}^{vap}} =0.75[/tex]
Regards!
WHAT CAN YOU LEARN OR (LEARNING GOAL) ABOUT MITOSIS AND CELL CYCLE?
Explanation:
At the end of mitosis, the new daughter cells contain the same number of chromosomes as the parent cell. Mitosis enables cellular growth and repair in multicellular organisms.
What is the IUPAC name for the following compound?
a. benzenecarbonitrile
b. benzenecyanide
c. phenylcyanide
d. cyanophenyl
Answer:
Option a. Benzenecarbonitrile
Explanation:
You are not providing the picture of the compound. However, I manage to find the picture of it, so I'm gonna answer this with the picture. Its attached here at the end.
As for the IUPAC name of this compound, it would be Benzenecarbonitrile, or simply, benzonitrile.
This compound has the molecular formula C₆H₅CN. It receives this name over the other ones, because this is a aromatic cyanide, and aromatic cyanide has nitriles behavior, (Strength of the nitrogen over the carbon), therefore, this group has priority over the whole molecule. As the principal chain is the benzene, the carbonitrile is the radical of the group, and when cyano groups are as radical and not as principal chains, it has a behavior of nitrile, and it's named as nitrile. therefore, option b, cannot be the name.
phenylcyanide is naming the phenyl as radical, but the benzene is the principal group in this compound, and the cyanide is the radical. It happens the same thing with cyanophenyl.
Hope this helps
Sound waves with a large distance between A and B would be sound waves that have a large
es
and produce loud sounds.
Answer:
Wavelength
Explanation:
Pls give me Brainliest
Many scientists are studying tiny particles called nanoparticles, Which best
describes how the scientists are probably trying to learn about these
particles?
Answer:
By experimenting
Explanation:
What property characterizes a spontaneous redox reaction?
A. A positive oxidation potential for the oxidation half-reaction
B. A positive reduction potential for the reduction half-reaction
C. A positive sum of the two half-reactions' standard potentials
D. A negative sum of the two half-reactions' standard potentials
Answer: C
Explanation:
Just took it :)
A positive sum of the two half-reactions' standard potentials is a property characterizes a spontaneous redox reaction. Hence, option C is correct.
What is spontaneous redox reaction?Spontaneous reactions are reactions in which no external force is applied to proceed with the reaction.
A spontaneous redox reaction maybe a sort of reaction during which there usually the discharge of energy where the electrons are transferred from anode to cathode and this is also known as the electrochemical cells equation the reactions result in the generation of electricity.
Redox reactions are reactions in which loss or gain of electrons occur between an atom.
In other words redox reaction between Zn and Cu²⁺ is spontaneous this is due to the difference in potential energy between these two substance.
A positive sum of the two half-reactions' standard potentials is a property characterizes a spontaneous redox reaction. Hence, option C is correct.
Learn more about spontaneous redox reaction, Here:
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What volume is occupied by 2.0 mol of gas at 3.0 atm
and 27 °C?
Increasing the temperature increase the rate of a reaction by doing which of the following
Answer:
Increase in temperature increases the average kinetic energy of the reactant molecules, hence lowering the activation energy of the reaction.
To obtain pure lead, lead (II) sulfide is burned in an atmosphere of pure oxygen. The products of the reaction are lead and sulfur trioxide (SO3). Write a balanced chemical equation for this process. How many grams of lead will be produced if 2.54 grams of PbS is burned with 1.88 g of O2? Express your answer to the correct number of significant figures. Be sure to show all steps completed to arrive at the answer. (Hint: be sure to work the problem with both PbS and O2).
Answer: 2.20 g Pb
They gave us the masses of two reactants and asked us to determine the mass of the product. We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.
Mᵣ: 239.27 32.00 207.2
2PbS + 3O₂ ⟶ 2Pb + 2SO₃
m/g: 2.54 1.88
What is the pH of a house cleaning solution with molar hydrogen ion concentration [H+] of 1.0 x 10-8? please explain. Thank you so much!
[tex]pH = - log({H}^{ + } ) \\ pH = - log(1.0 \times {10}^{ - 8} ) \\ pH = 8[/tex]
pH is the measure of acidity and alkalinity of a solution. A pH value less than 7 means the solution is acidic. A pH value greater than 7 means the solution is basic. A pH value of 7 means the solutions is neutral.
When calcium forms an ion that has the same number of outer electrons as which noble gas?
1. neon
2. helium
3. argon
4. krypton
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