The process of evaporation describes which of the following changes of state?solid ➡ liquid
gas ➡ solid
liquid ➡ gas
solid ➡ gas
Answers
Related Questions
Methane reacts with oxygen to produce carbon dioxide and water. What are the products? A.methane and waterB.oxygen and carbon dioxideC.methane and oxygenD.carbon dioxide and wate
Write this number showing three significant figures. Remember to round. 10,411
Which one of the following is an example of an acid-base reaction?A. HCI + KOH --> H2O + KClB. 2CuS + 302 –>2CuO + 2SO2C. S8 + 802 —> 8SO2D. C3H8 + 5O2 —> 3CO2 + 4H2O
A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a(n) .
Determine the total number of moles of oxygen that react completely with 8.0 moles of C2H6.
Answers
The number of moles of O₂ will be 28 moles.
The given balanced reaction:
From the above reaction,
2 moles of C₂H₆ nd 7 moles of O₂ reacts together to produce 4 moles of CO₂ and 6 moles of H₂O.
Given:
Number of moles of C₂H₆ = 8
To find:
Number of moles of O₂=?
2 moles of C₂H₆ reacts with 7 moles of O₂.
1 mol of C₂H₆ = moles of O₂
8 moles of C₂H₆ = moles of O₂
Thus, number of moles of O₂ will be 28 moles.
Find more information about "Number of moles" here:
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Explanation:
The principle used in the preparation of these salts is to dissolve
the cystine in an alcoholic alkali solution to which just sufficient
water to effect solution has been added, and, after filtering from
excess cystine, to precipitate the salt by addition of a suitable
indifferent solvent. While various solvents, such as acetone,
ether, or large amounts of alcohol caused precipitations, these were
either oily or amorphous. Only acetonitrile was found to possess
the power of initiating regular crystallization in the salt solutions.
While the solutions of the different salts require different amounts
of the solvent for complete precipitation, a partial substitution of
absolute ether for acetonitrile was found expedient in the case
of the most soluble of the salts, the K salt.
Answer:
It is simply a process of forming crystal.
Explanation: When salt is heated and dissolve in the liquid mainly water then its called saturated solution. When we further add salt and increase heat in order to dissolve it then it forcibly dissolve in liquid it's called supersaturated solution. After we slowly cool down the temperature then the salt we have put in supersaturated solution arises in the form of crystal. Hence its called crystalization.
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% by mass = 31.8 g LiCl / 225 g water + 31.8 g LiCl x 100%
% by mass = 12.38%
The reactant surface area increases.
The reaction rate decreases.
The reaction is not affected at all.
The reaction stops completely.
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Answer:
The increase in pressure alters the equilibrium of the reaction. In this case, the number of gaseous products in the reactant side is zero while the product side contains 1 gaseous product. The increase in pressure favors the side with less number of gaseous molecules which is the reactant side. Hence, the reaction rate decreases.
Explanation:
What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g/mol.)
Answers
KClO₃ = 122.55 g/mol
O₂ = 32 g/mol
2 KClO₃ = 2 KCl + 3 O₂
2 x 122.55 g KClO₃ ----------> 3 x 32 g O₂
10.0 g KClO₃ ------------------> ?
Mass of O₂ = ( 10.0 x 3 x 32 ) / ( 2 x 122.55 )
Mass of O₂ = 960 / 245.1
Mass of O₂ = 3.9167 g
number of moles O₂ => 3.9167 / 32 = 0.1223 moles
1 mol -------------- 22.4 L ( at STP)
0.1223 moles ---- ?
V = 0.1223 x 22.4 / 1
V = 2.739 L
hope this helps!
Your answer is 2.74.
Answers
[OH-] = 10^-pOH
= 10^-9
= 1.00x 10^-9
hope it helps
The negative log of hydrogen or hydronium ions concentration gives the pH of the solution. The concentration of hydronium is more than the hydroxide ions.
What are pH and pOH?
The pH of the solution is the concentration of the hydrogen or the hydronium ion in the aqueous solution, whereas the concentration of the hydroxide ion in the solution gives the pOH.
Let the pH of the tea = 5 then,
The concentration of hydronium ion is calculated as:
The concentration of hydroxide ion is calculated as:
Calculating further:
Therefore, the concentration of the hydronium ion is much higher than that of the hydroxide ion.
Learn more about pH and pOH here: