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masya89 [10]
3 years ago
8

Volume is a measurement of how fast particles of a substance are moving. true or false.

Chemistry
2 answers:
lara [203]3 years ago
7 0

Answer:  The answer is False.

Explanation:  Volume is defined as the whole space covered or occupied by the object.

It has an SI unit of meter cube (m3).

Thus kinetic energy is the measurement of how fast particles of a substance are moving.

uysha [10]3 years ago
5 0
That is false, volume is the amount of space that a substance or object occupies
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A liquid is heated until boils.
ella [17]
C. The thermometer reads 100
7 0
3 years ago
What is the boiling point elevation constant, Kb, of diethyl ether if 38.2 g of the nonelectrolyte benzophenone, C6H5COC6H5, dis
kakasveta [241]

Answer: the boiling point elevation constant is 1.73^0C/m

Explanation:

Elevation in boiling point is given by:

\Delta T_b=i\times K_b\times m

\Delta T_b=T_b-T_b^0= = Elevation in boling point

i= vant hoff factor = 1 (for non electrolyte)

K_b =boiling point constant = ?

m= molality

\Delta T_b=i\times K_b\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}

Weight of solvent (diethylether)= 330 g = 0.33 kg

Molar mass of solute (benzophenone)= 182 g/mol

Mass of solute (benzophenone) = 38.2 g

(35.7-34.6)^0C=1\times K_b\times \frac{38.2g}{182g/mol\times 0.33kg}

K_b=1.73^0C/m

Thus the boiling point elevation constant is 1.73^0C/m

3 0
3 years ago
A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these me
Tomtit [17]

Answer:

B). Precision.

Explanation:

During the course of measurements, two important factors are been seen to play key part which are accuracy and also precision. Precision here can reflect to the closeness of an answer towards the main value even though accuracy can show that too. Also it can show series of values been reproduced in the measurement flow; though in some cases can be a bit far from the actual value. Also its values are swen to be different because of repeatition and alsio in some cases, observational errors too.

4 0
3 years ago
What is the molarity of a solution that has 23.0 g of NaOH dissolved in 0.500 L of solution?
madreJ [45]

Answer: 1.15M

Explanation:

Given that,

Amount of moles of NaOH (n) = ?

Mass of NaOH in grams = 23.0g

For molar mass of NaOH, use the atomic masses: Na = 23g; O = 16g; H = 1g

NaOH = (23g + 16g + 1g)

= 40g/mol

Since, n = mass in grams / molar mass

n = 23.0g / 40.0g/mol

n = 0.575 mole

Volume of NaOH solution (v) = 0.5 L

Concentration of NaOH solution (c) = ?

Since concentration (c) is obtained by dividing the amount of solute dissolved by the volume of solvent, hence

c = n / v

c = 0.575 mole / 0.5L

c = 1.15 M (M stands for molarity and gives the concentration in moles per litres)

Thus, the molarity of the solution is 1.15M

5 0
3 years ago
Explain what a limiting reactant is and why it is important in stoichiomerty?
Afina-wow [57]

Answer:

It determines the maximum amount of the product that can be formed

Explanation:

Usually when performing a chemical reaction, it is hard to measure the exact amounts of the two reactants to react completely. This is why generally we take one reactant as our limiting reagent and another reagent in excess.

The reactant that is limiting reacts completely, while the reactant in excess still remains in a solution after reaction is over.

The importance of the limiting reactant is huge: it determines the maximum amount of the product that can be formed. It's limiting and, therefore, the extent of the reaction depends on how much of the limiting reagent we have. According to stoichiometry, we find the moles of a product formed directly from the limiting reagent, while the reagent in excess doesn't provide any relevant information.

4 0
3 years ago
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