When floral design first emerged as an art form, which technique was emphasized?
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if you make a solution by dissolving 1.0 mol of Fecl3 into 1 kg of water how would the osmotic pressure of this solution compare with the osmotic pressure of a solution that is made from 1.0 mol of glucose in 1 kg of water
The difference in the direction is caused by the ______________.Please help!
What is an ionic bond
"Henry mixed salt and water together in a cup until he observed a clear solution. He measured the mass of the solution. Then he placed the cup outside for several sunny days during the summer. After a week, he observed that only solid salt remained in the cup and the mass had decreased. Henry concluded that a physical and chemical change occurred in this investigation."Which statements correctly defend or dispute his conclusion?A.)He is correct. Dissolving salt in water is a physical change, but evaporating the water is a chemical change. Formation of a solid is evidence that a chemical change occurred.B.)He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.D.)He is incorrect. Dissolving salt in water and evaporation of the water are both chemical changes. The reappearance of salt is evidence that the change was reversible by a chemical change, so it could not be a physical change.
ideal gas?
(1) 37 K and 1 atm (3) 347 K and 1 atm
(2) 37 K and 8 atm (4) 347 K and 8 atm
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Ideal gas law is valid only for ideal gas not for vanderwaal gas. The correct option is option C that is at 347 K and 1 atm, the real gas will behave as ideal gas.
What is ideal gas equation?
Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of ideal gas
V= volume of ideal gas
n =number of moles of ideal gas
T =temperature of ideal gas
R = Gas constant = 0.0821 L.atm/K.mol
If a real gas or vanderwaal gas wants to follow the above equation that gas has to be at high temperature and low pressure.
Therefore the correct option is option C that is at 347 K and 1 atm, the real gas will behave as ideal gas.
To learn more about ideal gas equation, here:
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The most important thing to take note of is that molecularity of a reaction is a concept applicable to only elementary reactions, meaning non-complex. In a way, elementary reactions are basic and achieved in one step. Complex reactions involve intermediate steps before achieving the desired reaction.
Molecularity is equal to the sum of the coefficients of the reactants, so two reactants give a second-order bimolecular reaction. However, second-order reactions can involve more than two reactants especially in complex reactions.
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it is called the Earth's rotation
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Answer:
1.31moles
Explanation:
Given parameters:
Mass of CuO₂ = 125g
Unknown:
Number of moles = ?
Solution:
To solve this problem, we use the expression below:
Number of moles =
Molar mass of CuO₂ = 63.6 + 2(16) = 95.6g/mol
So;
Number of moles = = 1.31moles
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Answer:
For a: The mass percent of NaBr is 7.03 %
For b: The mass percent of KCl is 16.94 %
For c: The mass percent of toluene is 13.43 %
Explanation:
To calculate the mass percentage of solute in solution, we use the equation:
.......(1)
- For a:
We are given:
Mass of NaBr (Solute) = 5.50 g
Mass of solution = 78.2 g
Putting values in equation 1, we get:
Hence, the mass percent of NaBr is 7.03 %
- For b:
We are given:
Mass of KCl (Solute) = 31.0 g
Mass of water (solvent) = 152 g
Mass of solution = (31.0 + 152) g = 183 g
Putting values in equation 1, we get:
Hence, the mass percent of KCl is 16.94 %
- For c:
We are given:
Mass of toluene (Solute) = 4.5 g
Mass of benzene (solvent) = 29 g
Mass of solution = (4.5 + 29) g = 33.5 g
Putting values in equation 1, we get:
Hence, the mass percent of toluene is 13.43 %
Final answer:
To calculate the percent by mass of the solute in each aqueous solution, divide the mass of the solute by the mass of the solution and multiply by 100%
Explanation:
To calculate the percent by mass of the solute in each aqueous solution, you'll need to use the formula:
Percent by mass = (mass of solute/mass of solution) x 100%
For example, in solution (a) with 5.50 g of NaBr in 78.2 g of solution, the mass of the solute is 5.50 g and the mass of the solution is 78.2 g. Plugging these values into the formula gives:
Percent by mass = (5.50 g / 78.2 g) x 100% = 7.03%
Similarly, you can calculate the percent by mass for solutions (b) and (c) using the same formula.
Learn more about Calculating the percent by mass of solute in aqueous solutions here:
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Answer is: hydroxyl group (-OH).
A functional group is a group of atoms that determines many of the properties of an organic molecule.
Functional group for alcohol is hydroxyl group or hydroxy group (-OH).
In organic chemistry, alcohol and carboxylic acids contain hydroxy groups.
The atoms of functional groups are linked to each other and to the rest of the molecule with covalent bonds.