Answers
Answer:
Id say the third one
Explanation: chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time, so that there is no observable change in the properties of the system.
thats the only one that is close to definition
Related Questions
The relation between molarity and normality is expresses as: a) M = N x g.e.w/g.m.w
b) M = N x g.m.w/ g.e.w
c) M = N x no. of equiv./mole
d) M = N x no. of g.m.w/mole
Answers
Answer: [tex]Molarity=Normality\times \frac{gew}{gmw}[/tex]
Explanation:
Molarity is defined as the number of moles dissolved per liter of the solution.
[tex]Molarity=\frac{\text {moles of solute}}{\text {Volume in L}}[/tex]
[tex]{\text {moles of solute}=\frac{\text {given mass}}{\text {Molar mass}}[/tex]
Normality is defined as the number of gram equivalents dissolved per liter of the solution.
[tex]Normality=\frac{\text {gram equivalents of solute}}{\text {Volume in L}}[/tex]
[tex]{\text {gram equivalents of solute}}=\frac{\text {given mass}}{\text {Equivalent mass}}[/tex]
Thus [tex]Molarity=Normality\times \frac{\text {Equivalent mass}}{\text {Molar mass}}[/tex]
h20 (s) -> h20 (g)
endothermic or exothermic
Answers
Answer:
Endothermic.
Explanation:
Hello there!
In this case, it is necessary to keep in mind that exothermic processes are characterized by the release of energy and the endothermic processes by the absorption of heat. In such a way, every process from solid to liquid or gas is endothermic as they require energy to separate the molecules and therefore turn out in the phase change. On the other hand, every process from gas to liquid or solid is exothermic as heat is released to rejoin the molecules and produce the phase change.
Therefore, since solid water molecules tend to be well-arranged, it is necessary to add heat to the system to produce the phase change until gas; in such a way, this process is endothermic as energy must be absorbed by the ice.
Best regards!
If the reaction is begun with an initial PH3 concentration of 0.95 M, what will be the concentration of PH3 after 30.50 s
Answers
Answer:
[tex][PH_3]=0.30M[/tex] but see detailed explanation, please.
Explanation:
Hello there!
In this case, unfortunately, we are not given the rate constant but we can set up a reaction according to the information available on the internet:
[tex]4PH_3\rightarrow P_4+6H_2[/tex]
Whose rate constant is 0.0375/s. In such a way, it is possible infer that this is first-order reaction whose integrated rate law is:
[tex][PH_3]=[PH_3]_0exp(-kt)[/tex]
Thus, given the initial concentration, rate constant and elapsed time, the final concentration of PH3 would be:
[tex][PH_3]=(0.95M)exp(-30.50s*0.0375/s)\\\\[/tex]
[tex][PH_3]=0.30M[/tex]
However, it is important to keep in mind this result may vary according to your actual question.
Regards!
Which of the following molecules have a dipole moment?
Select one or more:
CS2
SeS2
CINO
ВСІЗ
CClaF2
CO2
PCIE
Com
Answers
Answer:
cs2
Explanation:
Calculate AH for the reaction, 5 C(s) + 6 H2(g) → C5H12(1) given the following information
C5H12(1) + 8 O2(g) → 5 CO2(g) + 6 H2O(g) AH = -3,244.8 kJ
C(s) + O2(g) → CO2(g) AH = -393.5 kJ
2 H2(g) + O2(g) → 2 H2O(g) AH = -483.5 kJ
Select one:
a. 2,367.8 kJ
b. -173.2 kJ
C. -6,662.8 kJ
d. -4,121.8 kJ
Answers
Answer:
b
Explanation:
reverse the first reaction
multiply the second by 5
multiply the third by 3
3244.8-1967.5-1450.5=-173.2
how is the temporory hardness of water remove bye boiling mathod
Answers
Answer:
The temporary hardness of water can be removed by boiling. The bicarbonates get converted to insoluble carbonates and settle down at the bottom.
Calcium bicarbonate -------> Calcium carbonate [insoluble] + Water + Carbon dioxide.
Ca[HCO3]2 -----> Ca CO3 + H2O + CO2
what is a chemical property
Answers
Answer:
Chemical property is a characteristic of a particular substance that can be observed in a chemical reaction.
Explanation:
Hope this helps :)
Answer:
A chemical property is any of a material's propertiesthat becomes evident during, or after, a chemicalreaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.
What does evaporation produce?
a precipitation
brain or snow
С
water vapor
d condensation
Answers
Answer:
C. Water Vapor
Explanation:
Hope this helps! Have an Amazing day!!
Answer: Hewo, there! your answer is Below
c. water vapor Is the correct answer.
Explanation:
The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
Hope this helps you!
Have a great day!!
-August-
Why does the cake and pan feel different to your hand when you take them out of the oven? Explain
Answers
Answer:
bcs the oven heated it up?
Explanation:
A balloon inflated in a room at 24°C has a volume of 4.00 L. The balloon is then heated to a temperature of
58°C. What is the new volume if the pressure remains constant?
Answers
Answer: 4.46 L
Explanation: By using Charles’s Law, we know that V1/T1=V2/T2. And whenever temperature is involved, you have to convert from Celsius to Kelvin (C° + 273). So, 4.00/ 24 +273 = V2/ 58 + 273. So the answer is, around 4.46 L.
Determine the moles of carbon dioxide in 2.9 X 10¹² molecules.Round to 2 significant figures.
Answers
Complexes containing metals with d10 electron configurations are typically colorless because ________. Complexes containing metals with d10 electron configurations are typically colorless because ________. d electrons must be emitted by the complex in order for it to appear colored there are no d electrons to form bonds to ligands a complex must be charged to be colored there is no d electron that can be promoted via the absorption of visible light the empty d orbitals absorb all of the visible wavelengths
Answers
Answer:
there is no d electron that can be promoted via the absorption of visible light
Explanation:
One of the properties of transition elements is the possession of incompletely filled d orbitals. This property accounts for their unique colours.
The colours of transition metal compounds stem from d-d transition of electrons due to the presence of vacant d orbitals of appropriate energy to which electrons could be promoted.
For elements whose atoms have a d10 configuration, such vacant orbitals does not exist hence their compounds are not colored.
Sometimes, the colour of transition metal compounds stem from ligand to metal charge transfer(LMCT) for instance in KMnO4.
Hydrogen, deuterium, and singly ionized helium are all examples of one-electronatoms. The deuterium nucleus has the same charge as the hydrogen nucleus, and almost exactlytwice the mass. The helium nucleus has twice the charge of the hydrogen nucleus, and almostexactly four times the mass. Make a prediction of the ratios of the ground state energies of theseatoms, considering that current spectroscopy accuracy is extremely good (on the order of107).
Answers
Answer:
0.99986
Explanation:
attached below is the detailed solution to the given problem
Express the ratios of the ground state energies of these atoms
ground state energies ( Ed , Ehe )
= Ed / Ehe = -13.5963 / -13.59815
= 0.99986
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 1.5 g of hydrochloric acid is mixed with 2.67 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to significant digits.
Answers
Answer: The maximum amount of water that can be produced is 0.74 g
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] .....(1)
Putting values in equation 1, we get:
[tex]\text{Moles of hydrochloric acid:}=\frac{1.5g}{36.5g/mol}=0.041mol[/tex]
[tex]\text{Moles of sodium hydroxide}=\frac{2.67g}{40g/mol}=0.067mol[/tex]
The chemical equation for the reaction is
[tex]HCl+NaOH\rightarrow NaCl+H_2O[/tex]
By Stoichiometry of the reaction:
1 mole of HCl reacts with 1 mole of NaOH
So, 0.041 moles of HCl will react with = [tex]\frac{1}{1}\times 0.041=0.041mol[/tex] of NaOH
As, given amount of NaOH is more than the required amount. So, it is considered as an excess reagent. Thus, HCl is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
1 mole of HCl produces = 1 mole of water
So, 0.041 moles of HCl will produce = [tex]\frac{1}{1}\times 0.041=0.041moles[/tex] of water
Mass of water=[tex]moles\times {\text{Molar Mass}}=0.041mol\times 18g/mol=0.74g[/tex]
Thus the maximum amount of water that can be produced is 0.74 g
The state of matter in which a material has definite shape and definite
volume is the
Answers
Answer:
It's a solid.
Explanation:
Solids never change their shape as opposed to gases and liquids. This is because their molecules are tightly packed together. Since all solids have a definite shape, it's volume will also be definite.
Without using the value of So, predict the sign for
a) 2K(s) + F2(g) → 2KF(g)
b) NaClO3(s) → Na+(aq) + ClO3-(aq)
c) 2NO(g) + O2(g) → 2NO2(g)
d) H2S(g) + O2(g) → S8(s) + H2O(g)
Answers
Answer:
a) 2f
B)CIO3+na
c)2NO2(g)
d)HSO3(h)
Explanation:
The sign of entropy depends on the number of gaseous substance in the system. In the first reaction, the number of gaseous particles increase in the product hence, randomness increases and thereby entropy is positive.
What is entropy ?Entropy is a thermodynamic quantity which measures the randomness of the system. As the disorder in the system increases, the entropy increases and the entropy change is said to be positive in sign.
In the first reaction, in the product side, 2 moles of gaseous substance is formed, which increases the randomness, hence, entropy change is positive.
In the second reaction, the more ordered solid state is getting into less ordered aqueous state. Hence, S is positive.
For the third reaction, the number of moles of gas decreases from 3 to 2. Hence S is negative. For the last reaction, there is no change in number of moles or state of substance and no change in S.
Find more on entropy:
https://brainly.com/question/13135498
#SPJ3
how many grams are there in 1.30x10^24 atoms of silver?
Answers
Answer:
7
Explanation: i just guessed because i need some points
A gas that exerts a pressure of
15.6 psi in a container with a volume of
L will exert a pressure of
25.43 psi when transferred to a
container with a volume of 1.895 L.
Answers
Answer:
3.089 L
Explanation:
From the given information, provided that the no of moles and the temperature remains constant;
[tex]P_1[/tex] = 15.6 psi
[tex]V_1[/tex] = ???
[tex]P_2[/tex] = 25.43 psi
[tex]V_2[/tex] = 1.895 L
Using Boyle's law:
[tex]P_1V_1 =P_2V_2 \\ \\ V_1 = \dfrac{P_2V_2}{P_1} \\ \\ V_1 = \dfrac{25.43 \times 1.895}{15.6} \\ \\ \mathbf{ V_1 = 3.089 \ L}[/tex]
what are possible source of error for rusting of a nail
Answers
Answer:
A nail can rust when exposed to oxygen. the molecules of iron on the surface of the nail exchange atoms with the oxygen in the air and produce a new substance, the reddish brown ferrous oxide i.e rust.
How does the entropy change in the reaction 2C3H6(g) + 9O2(g) → 6C02(g) + 6H2O (g)?
I will mark brainliest!! Thank you so much!!
Answers
Answer:
The entropy increases!!!
Explanation:
a pex
The entropy increases in the reaction.
What is entropy?Entropy is defined as the measure of the disorder of a system.Entropy is an extensive property of a thermodynamic system, to put it in simple words, its value changes depending on the amount of matter that is present.Entropy is denoted by the letter S and has units of joules per kelvin (JK−1)The entropy increases in the reaction if the total number of product molecules are greater than the total number of reactant molecules.
2C3H6(g) + 9O2(g) → 6C02(g) + 6H2O (g)
In the above reaction, the product molecules are greater than the reactant molecules. Hence, entropy increases.
Hence, we can conclude that option A is the answer.
To learn more about entropy here
https://brainly.com/question/22861773
#SPJ2
arrange the following in order of ionization energy, Na, Na+, C, O
Answers
Answer:
Na+, O, C, Na
(Na+ has more ionization energy and Na has less ionization energy)
As an FDA physiologist, you need 0.625 L of phosphoric acid acid / dihydrogen phosphate (H3PO4 (aq) / H2PO4 - (aq) ) buffer with a pH of 2.75. How do you prepare this solution from stock solutions of 1.0 M H3PO4 (formic acid) and 1.5 M NaOH
Answers
Answer:
0.4058L of 1.0M H3PO4
0.2192L of 1.5M NaOH
Explanation:
The pKa of the H3PO4 / H2PO4- buffer is 2.12
To solve this question we must use H-H equation for this system:
pH = pKa + log [H2PO4-] / [H3PO4]
2.75 = 2.12 + log [H2PO4-] / [H3PO4]
0.63 = log [H2PO4-] / [H3PO4]
4.2658 = [H2PO4-] / [H3PO4] (1)
Where [] could be taken as the moles of each reactant
As you have H3PO4 solution, the reaction with NaOH is:
H3PO4 + NaOH → H2PO4- + Na+ + H2O
As you can see, both H3PO4 and H2PO4- comes from the same 1.0M H3PO4 solution
The moles of H3PO4 are:
[H3PO4] = Moles H3PO4 - Moles NaOH
And for H2PO4-:
[H2PO4-] = Moles NaOH added
Replacing in (1):
4.2658 = [Moles NaOH] / [Moles H3PO4 - Moles NaOH]
4.2658 Moles H3PO4 - 4.2658 moles NaOH = Moles NaOH
4.2658 Moles H3PO4 = 5.2658 moles NaOH (1)
In volume:
0.625L = Moles H3PO4 / 1.0M + Moles NaOH / 1.5M
0.625 = Mol H3PO4 + 0.6667 Moles NaOH (2)
Replacing (2) in (1):
4.2658 Moles H3PO4 = 5.2658 (0.625 - Mol H3PO4 / 0.6667)
4.2658 Moles H3PO4 = 5.2658 (0.625 - Mol H3PO4) / 0.6667
4.2658 Moles H3PO4 = 5.2658*(0.9375 - 1.5 mol H3PO4)
4.2658 Moles H3PO4 = 4.9367 -7.8983 mol H3PO4
12.1641 mol H3PO4 = 4.9367
Mol H3PO4 = 0.4058moles * (1L / 1.0moles) =
0.4058L of 1.0M H3PO4
And:
0.625L - 0.4058L =
0.2192L of 1.5M NaOH
different between intermolecular and intra molecular dehydration
Answers
1. This is very important in preventing the spread of pathogens in the kitchen.
Answers
state the conditions under which copper reacts with sulphuric (vi) acid and give an equation for the reaction
Answers
Answer:
When the metal reacts with hot, concentrated sulphuric acid, the products of the reaction are copper (II) sulphate, sulphur dioxide and water. Cu + 2H2SO4 = CuSO4 + SO2 + 2H2O. This is a typical redox reaction in which the acid is reduced to SO2, but no hydrogen is produced here
with a well labeled diagram explain the stages of meiosis and mitosis
Answers
Answer:
hope that helps
Which one of the following statements concerning the length of carbon-carbon single, double, and triple covalent bonds is true?
A. The carbon-carbon single bond is shorter than either the carbon-carbon double or triple bond.
B. The carbon-carbon double bond is shorter than either the carbon-carbon single or triple bond.
C. The carbon-carbon triple bond is shorter than either the carbon-carbon single or double bond.
D. The carbon-carbon single, double, and triple bonds all have the same length.
Answers
Answer:
[tex]\color{Blue}\huge\boxed{Question} [/tex]
Which one of the following statements concerning the length of carbon-carbon single, double, and triple covalent bonds is true?[tex]\color{Blue}\huge\boxed{Answer} [/tex]
D. The carbon-carbon single, double, and triple bonds all have the same length.The statement concerning the length of carbon-carbon single, double, and triple covalent bonds which is true is: D. The carbon-carbon single, double, and triple bonds all have the same length.
A chemical bond can be defined as the forces of attraction between ions, crystals, atoms or molecules which are typically responsible for the formation of chemical compounds. Thus, a chemical bond is a force that holds atom together and binds crystals, ions or molecules together, so as to form a chemical compound.
Generally, there are three (3) main types of chemical bonds and these includes:
Hydrogen bonds.Ionic bonds.Covalent bonds.A covalent bond can be defined as a type of bond that typically involves the sharing of electrons between the atoms of a chemical element. The type of bond formed between two or more carbon atoms is a covalent bond. Hence, carbon atoms can either form a single, double, or triple covalent bonds with the same length.
In conclusion, the length of carbon-carbon single, double, and triple covalent bonds are all the same.
Read more: https://brainly.com/question/24212500
What volume in milliliters of 0.100 M HCIO3 is required to neutralize
40.0 mL of 0.165 M KOH?
Answers
Answer:
66.0 mL HClO3
Explanation:
M1V1 = M2V2
M1 = 0.100 M HClO3
V1 = ?
M2 = 0.165 M KOH
V2 = 40.0 mL KOH
Solve for V1 --> V1 = M2V2/M1
V1 = (0.165 M)(40.0 mL) / (0.100 M) = 66.0 mL HClO3
HELP plis !
Find the molar masses of the following compounds: SHOW ALL WORK!!!
1) LiI. Li. 7 + I 127
134g/mol
2) PbCO4
Pb =. 1 x 207 =207
C = 1 X 12 = 12
O = 4 x 16 = 64
283 g/mol
3) Mg(OH)2
Mg= 1x 12 = 12
O= 2 x16 =32
H= 2x1= 2
46 g/mol
4) K3PO4
5) (NH4)3PO4
6) C12H22O11
7) Fe2(SO4)3
8) Na3P
9) AgF
10) NH4C2H3O2
Answers
Answer:
Bro what is this math or something
Explanation:
provide the electronic structure diagram of propene showing all molecular orbitals
Answers
Answer:
Explanation:The pi-molecular orbitals in propene (CH3-CH=CH2) are essentially the ... This central carbon thus provides two p-orbitals – one for each pi bond – and these two different p-orbitals have to be perpendicular, leading to a twisted structure as shown: ... It all comes down to where the location of the electron-deficient carbon