At standard temperature and pressure (STP), 1 mole of any gas occupies:

A student is trying to calculate the density of an ice cream cone. She already knows the mass, but she needs to determine the vo

IgorLugansk [536]

V equals one-third times pi times r squared times h

6 0

3 years ago

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A 0.870 g sample of a monoprotic acid is dissolved in water and titrated with 0.300 M KOH.

Vedmedyk [2.9K]

Answer: The molar mass of monoprotic acid is 126.1 g/mol

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Molarity of KOH solution = 0.300 M

Volume of solution = 23.00 mL

Putting values in above equation, we get:

$0.300M=\frac{\text{Moles of KOH}\times 1000}{23.00}\\\\\text{Moles of KOH}=\frac{0.300\times 23.00}{1000}=0.0069moles$

The chemical equation for the reaction of monoprotic acid and KOH follows:

$HA+KOH\rightarrow KA+H_2O$

By Stoichiometry of the reaction:

1 mole of KOH reacts with 1 mole of HA

So, 0.0069 moles of KOH will react with = $\frac{1}{1}\times 0.0069=0.0069$ moles of HA

To calculate the molar mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of HA = 0.870 g

Moles of monoprotic acid = 0.0069 mol

Putting values in above equation, we get:

$0.0069mol=\frac{0.870g}{\text{Molar mass of monoprotic acid}}\\\\\text{Molar mass of monoprotic acid}=\frac{0.870g}{0.0069mol}=126.1g/mol$

Hence, the molar mass of monoprotic acid is 126.1 g/mol

3 0

3 years ago

?????????????????? Why are quantities important in the study of chemistry give an example please

slamgirl [31]

Answer:

Chemistry is the study of matter and how it behaves.

The scientific method is the general process by which we learn about the natural universe.

Explanation:

8 0

3 years ago

Identify special properties of water including surface tension and specific heat

anyanavicka [17]

Specific Heat-the heat required to raise the temperature of the mass of a substance by a cetain amount
Adhesion-attraction amoung molecules of a different substance.
Cohesion-attraction amoung molecules in a substance
Hydrogen Bonding- a bond between an hydrogen atom and a negative atom
Polar- difference of charge across the molecule

6 0

3 years ago

What volume (cm 3 ) would 9.0 grams of aluminum occupy? Density is 2.7 g/cm 3 . Show your work

saul85 [17]

Answer:

3.3 cm³

Explanation:

Use the density formula, d = m/v, to solve for the volume:

2.7 = 9.0/v

2.7v = 9.0

v = 3.3 cm³

5 0

4 years ago