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3 years ago

Why is self evaluation important in reaching goals?

1 answer:

6 0

<span>Self evaluation is important at any stage in your life. In today’s world, most organizations use self evaluation for any project and services they have in place. Furthermore, teachers are now actively encouraging their pupils to self evaluate. Self evaluation is an important part of being committed to lifelong learning – the understanding that you will never complete your learning journey and grab every opportunity to learn new skills. More and more workplaces now encourage their staff to be committed to lifelong learning, offering learning skills through formal and informal pathways. Self evaluation is particularly important when choosing learning through informal pathways, as formal assessments are less likely to take place in such settings.</span>

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Solution a is a 1.0 m solution with a nonionic solute and water as the solvent. solution b is a 1.0 m solution with the same non

solniwko [45]

<span>The solution of ethanol will have the greatest increase in boiling point.
The formula for boiling point elevation is:
Î”Tb = Kb Â· bB
where
Î”Tb = boiling point elevation
Kb = ebullioscopic constant for the solvent
bB = molarity of the solution
Since in the solute is nonionic, we don't have to worry about the molecules of the solute breaking up into multiple ions, thereby increasing the effective molarity of the solution. So which ever solvent has the highest ebullioscopic constant, will have the greatest increase in boiling point. This constant can be calculated by the equation:
Kb = RTb^2M/Î”Hv
where
R = Ideal gas constant
Tb = boiling point of pure solvent
M = Molar mass of solvent
Î”Hv = heat of vaporization per mole of solvent
For our purposes, we can ignore the idea gas constant, and instead look at only the boiling point, molar mass, and heat of vaporization. Then calculate Tb^2M/Î”Hv So let's do so:
(Note: Not bothering to be precise in molar mass. If the end result is close, then I'll bother. Otherwise, just using nice round numbers).
Water
Boiling point: 373.15 K
Molar mass: 18 g/mol
heat of vaporization: 40660 J/mol
Tb^2M/Î”Hv: 61.64
Ethanol
Boiling point: 351.52 K
Molar mass: 46 g/mol
heat of vaporization: 38600 J/mol
Tb^2M/Î”Hv: 147.26
The value of Tb^2M/Î”Hv is significantly greater for ethanol than it is for water (by more than 2 to 1), so it will have the greatest increase in boiling point.</span>

4 0

3 years ago

Read 2 more answers

Even when an object appears to be at rest, its atoms and molecules are in constant motion

natita [175]

Answer:

the answer is True

Explanation:

the answer is True

5 0

3 years ago

Acids and bases can neutralize each other in double displacement reactions. For example, if hydrogen chloride (a strong acid, HC

scoray [572]

Answer:

The answer to your question is HCl + NaOH ⇒ NaCl + H₂O

Explanation:

Data

Double displacement reaction

Balanced chemical reaction

HCl + NaOH ⇒ NaCl + H₂O

Reactants Elements Products

1 Chlorine (Cl) 1

1 Sodium (Na) 1

2 Hydrogen (H) 2

1 Oxygen (0) 1

As we can see, the reaction is balanced and the coefficients of all reactants and products are 1, but the number is not written in a balanced reaction.

8 0

3 years ago

PLEASE HELP ASAP. I WILL MARK BRAINLIEST!!!

iris [78.8K]

I Cant Answer your question but maybe this will help

Volume Changes for Gases

Particles in a gas have more freedom of movement than they do in a liquid. According to the ideal gas law, the pressure (P) and volume (V) of a gas are mutually dependent on temperature (T) and the number of moles of gas present (n). The ideal gas equation is PV = nRT, where R is a constant known as the ideal gas constant. In SI (metric) units, the value of this constant is 8.314 joules ÷ mole - degree K.

Pressure is constant: Rearranging this equation to isolate volume, you get: V = nRT ÷ P, and if you keep the pressure and number of moles constant, you have a direct relationship between volume and temperature: ∆V = nR∆T ÷ P, where ∆V is change in volume and ∆T is change in temperature. If you start from an initial temperature T0 and pressure V0 and want to know the volume at a new temperature T1 the equation becomes:

V1 = [n • R • (T1 - T0) ÷ P] +V0

Temperature is constant: If you keep the temperature constant and allow pressure to change, this equation gives you a direct relationship between volume and pressure:

V1 = [n • R • T ÷ (P1 - P0)] + V0

Notice that the volume is larger if T1 is larger than T0 but smaller if P1 is larger than P0.

Pressure and temperature both vary: When both temperature and pressure vary, the the equation becomes:

V1 = n • R • (T1 - T0) ÷ (P1 - P0) + V0

Plug in the values for initial and final temperature and pressure and the value for initial volume to find the new volume.

6 0

3 years ago

Read 2 more answers

Explain what interaction is in the hydrogen fluoride (HF) and hydrogen chlori de (H CI) Which one do you expect to have a higher

djyliett [7]

Explanation:

Part A

Boiling point of HF is much higher as compared to the boiling point of HCl.

Reason:

The strongest inter molecular hydrogen bonding exist between HF molecules This is due to highly electronegative Fluorine atom.

Part B

The type of bonding present in the given compounds are:

1. Ice

The water molecules in ice are linked to each other through intermolecular hydrogen bonding due to the presence of electronegative oxygen atom that is attached to hydrogen atom.

2. Copper dioxide

In Copper dioxide, Copper and oxide ions are linked to each other via electrostatic force of attraction due to the presence of electronegative Oxygen atom and electropositive Cu atom.

Therefore, ionic bond is present in it.

3. Steel

In steel, metal and negatively charged electrons are linked to each other, thus giving rise to metallic bond between steel molecules.

4. Silicon elastomer

In silicon elastomer, Silicon atom is linked to other atom via covalent bonds due to sharing of electrons.

5. Tungsten

In the case of tungsten also, atoms are bonded to each other via metallic bond.

7 0

3 years ago