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4 years ago

Below is a list of terms used in characterizing solutions. Match the words.

Chemistry

1 answer:

MA_775_DIABLO [31]4 years ago

7 0

Answer:

1) molality

2) e. mole fraction

3) c. solvent

4) d. solute

5) a. molarity

Hope this helps.

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How many grams of barium chloride are produced when 1.25 x 1023 molecules of HCl reacts with barium?

sp2606 [1]

Considering the reaction stoichiometry and Avogadro's Number, the mass of barium chloride produced is 21.6 grams.

<h2>Balanced reaction</h2>

The balanced reaction is

2 HCl + Ba → BaCl₂ + H₂

<h2>Moles of HCl that react</h2>

Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ molecules are contained in 1 mole of HCl, then 1.25×10²³ molecules are contained in how many moles of HCl?

amount of moles of HCl= (1.25×10²³ molecules × 1 mole)÷ 6.023×10²³ atoms

<u><em>amount of moles of HCl= 0.2075 moles</em></u>

Then, 0.2075 moles of HCl react.

<h2>Reaction stoichiometry</h2>

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

HCl: 2 moles
Ba: 1 mole
BaCl₂: 1 mole
H₂: 1 mole

<h2>Mass of barium chloride produced</h2>

Then you can apply the following rule of three: if by stoichiometry 2 moles of HCl produce 1 mole of BaCl₂, 0.2075 moles of HCl will produce how many moles of BaCl₂?

$amount of moles of BaCl_{2} =\frac{0.2075 moles of HCl x 1 mole of BaCl_{2} }{ 2moles of HCl}$

<u><em>amount of moles of BaCl₂= 0.10375 moles</em></u>

Being the molar mass of BaCl₂ 208.24 g/mole, then the mass of barium chloride produced is calculated as:

$0.10375 molesx\frac{208.24 grams}{1 mole} =21.6 grams$

Finally, the mass of barium chloride produced is 21.6 grams.

Learn more about:

Avogadro's Number

Reaction stoichiometry

7 0

3 years ago

If the pressure of a gas is 1.50 atm, its volume is 2.50 L, and its temperature is 22, what is the volume if the pressure is inc

aksik [14]

Answer:

The answer to your question is V2 = 1.3 l

Explanation:

Data

Pressure 1 = P1 = 1.5 atm

Volume 1 = V1 = 2.50 l

Temperature 1 = T1 = 22°C

Pressure 2 = P2 = 3 atm

Volume 2 = V2 = ?

Temperature 2 = T2 = 35°C

Process

1.- Convert temperature to °K

T1 = 22 + 273 = 295°K

T2 = 35 + 273 = 308°K

2.- Use the combine gas law to solve this problem

P1V1/T1 = P2V2/T2

-Solve for V2

V2 = P1V1T2 / T1P2

3.- Substitution

V2 = (1.5 x 2.5 x 308) / (295 x 3)

4.- Simplification

V2 = 1155 / 885

5.- Result

V2 = 1.3 l

3 0

4 years ago

Calculate the amount in grams of Na2CO3 needed in a reaction with HCl to produce 120g NaCl?

klemol [59]

The balanced chemical reaction is written as :

Na2CO3<span> + 2HCl === 2NaCl + H2O + CO2
</span>
We are given the amount of NaCl to be produced from the reaction. This will be the starting point for the calculations. We do as follows:

120 g NaCl ( 1 mol / 58.44 g) ( 1 mol Na2CO3 / 2 mol NaCl)( 105.99 g / 1 mol ) = 1108.82 g Na2CO3 needed

8 0

3 years ago

A ___________________________ is a mixture in which the properties of thesubstances are spread evenly.

wel

Answer:

homogenous mixture

Explanation:

6 0

3 years ago

The diagrams below illustrate models of various chemical compounds.

USPshnik [31]

Answer:

A compound is a chemical substance made up of two or more

different chemical elements. An element is a pure substance made up

of only one chemical.

5 0

2 years ago