Irony can be seen in which of the following lines? (Mark all that apply.)

A sample of H2 gas (2.0 L) at 3.5 atm was combined with 1.5 L of N2 gas at 2.6 atm pressure at a constant temperature of 25 °C i

Tamiku [17]

For this system, we use Dalton's law of partial pressures where the total pressure of a gas mixture is said to be equal to the sum of the partial pressures of the gases. The partial pressure of each gas would be calculated by the product of the mole fraction and the original pressure of the gas. We do as follows:

Total pressure = x1P1 + x2P2
Total pressure = (2.0 / 7.0 )(3.5) + (1.5/7.0)(2.6)
Total pressure = 1.56 atm

4 0

3 years ago

How many mols are present in the a sample of silver nitrate which has<br> 5.3x10^24 molecules.

Westkost [7]

Answer: 5.3 x 10^24 formula units of silver nitrate is equivalent to 8.8 moles of silver nitrate. Silver nitrate is an ionic compound, therefore, its representative particle is called a "formula unit" instead of molecule. For every mole of a substance, we know that there are 6.022 x 10^23 representative units of that substance. The amount of particles in one mole of substance is called Avogadro's number.

Further Explanation:

We can convert from number of representative particles to moles using the formula:

$\boxed {no. \ of \ moles \ = \ ( given \ no. \ of \ particles) \ (\frac{1 \ mole}{\ 6.022 \ x 10^{23} particles})}$

For this problem, we can calculate the number of moles by plugging in the given values to the equation above,

$no. \ of \ moles \ = (5.3 \ x \ 10^{24} \ formula \ units \ AgNO_{3}) \ (\frac{1 \ mole \ AgNO_{3}}{6.022 \ x 10^{23} \ formula \ units AgNO_{3}}) \\\\\boxed {no. \ of moles \ AgNO_{3} \ = \ 8.8 \ moles}$

Learn More

Learn more about representative particles brainly.com/question/8969313
Learn more about Avogadro's number brainly.com/question/229300
Learn more about mole conversions brainly.com/question/1370888

Keywords: moles conversion, Avogadro's number

5 0

3 years ago

Which method would be effective for separating salt and water in a mixture?

Tatiana [17]

A seperation method that would be most successful woth the separation of a salt and water mixture would be evaporation for these reasons, (1) There are no magnetic elements involved with salt nor with water, (2) Observing colour differences would not have much affect on separating the two, and (3) Chromatography is used to separate two liquids, such as speparating two dyes, not salt and water.

Evaporation:
The water will evaporate, leaving you with salt as a solid.

6 0

3 years ago

50 ml of 0. 100 m hcl is titrated with 0. 1500 m naoh. the ph at the equivalence point is:_____.

marysya [2.9K]

The answer is 7.

The equivalence point of a titration is when moles of titrant added becomes equal to the moles of sample analyte.

Calculate the pH at equivalence point for a strong acid and strong base reaction.

The given acid is HCl which is a strong acid and the base NaOH is also a strong base.
Calculate the moles of acid HCl:

Molarity of $HCl$ = 0.100 M

Volume of $HCl$ = 50 mL = 0.050 L

$Moles\ of\ HCl\ = Molarity\ of\ HCl$ × $Volume\ of\ HCl\ in\ L$

$= 0.100\ M$ × $0.050\ L = 0.005\ moles$

At equivalence point, same moles of base are added and thus it results into complete neutralization. Thus, all the hydrogen ions of acid are neutralized by the hydroxide ions of the base forming only water and neutral salt.
Thus, the pH at the equivalence point becomes 7 (neutral solution).

To learn more about pH at equivalence point visit:

brainly.com/question/23942601

7 0

2 years ago

I NEED HELP ASAP, If you help me I’ll give you Brainlist [Calorimetry and specific heat lab]

Lyrx [107]

Answer:

Explanation:

I gave this formula as

What you should get - what you got

--------------------------------------------------- * 100

What you should get

Suppose you are talking about the specific heat of copper and you did a lab and did it fairly well and the specific heat came out to be 0.33

That's what you got, 0.33

What you should get is 0.35 according to the table you've given us.

% error = 0.35 - 0.33

-------------- * 100

0.35

% error = 0.02 * 100/ 0.35

% error = 2/0.35

% error = 5.71

Now here is the really hard part. You have to decide what a positive error is and what a negative error.

A positive error using this formula means you are too low.

A Negative error means that you are too high, just the opposite of what you might think.

6 0

3 years ago

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