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2 years ago

Which of the following ions is least likely to form colored compounds?

Chemistry

1 answer:

andreyandreev [35.5K]2 years ago

3 0

Answer:

i think d maybe correct me if im wrong

Explanation:

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compare (a) the numer of atoms and (b) the number of grams present in 1.00 mole of helium and 1.00 mole of argon

WITCHER [35]

Answer:

For a: The number of atoms of both the gases remains the same.

For b: The number of grams of 1 mole of argon is more than 1 mole of helium by 35.95 grams.

Explanation:

For a:

To calculate the number of atoms, we use mole concept.

According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

We are given two gases of same number of moles.

Therefore, 1 mole of helium gas will contain $1\times 6.022\times 10^{23}=6.022\times 10^{23}$ number of atoms.

and, 1 mole of argon gas will contain $1\times 6.022\times 10^{23}=6.022\times 10^{23}$ number of atoms.

Hence, number of atoms of both the given gases remains the same.

For 2:

As, the molar mass of both the gases are different, so their masses in 1 mole will be different.

To calculate the number of moles, we use the equation:

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

Calculating the mass of Helium in 1 mole:

Molar mass of helium = 4 g/mol

Putting the values in above equation, we get:

$1mol=\frac{\text{Given mass}}{4g/mol}=4grams$

Calculating the mass of Argon in 1 mole:

Molar mass of Argon = 39.95 g/mol

Putting the values in above equation, we get:

$1mol=\frac{\text{Given mass}}{39.95g/mol}=39.954grams$

Calculating the difference of masses of both the gases = (39.95 - 4)g = 35.95g

Therefore, the mass of argon is more than mass of helium by 35.95 grams.

8 0

3 years ago

Solutions of sodium sulfate and silver nitrate are mixed together.

Vera_Pavlovna [14]

Answer:

The correct option is a) Precipitate: silver sulfate

Net Ionic: 2Ag+ + SO42 →Ag2SO4

Explanation:

When sodium sulfate reacts with silver nitrate, the following reaction occurs:

2AgNO3 + Na2SO4 → Ag2SO4 + 2NaNO3

The NaNO3 is easily soluble in water. However, silver ions form an insoluble solid with SO4. The Ag+ in this compound will be a cation having a positive charge. The SO4- will be an anion having an negative charge.

The table with solubility rules show that the sulfates of Ag+, Ca+, Sr2+, Ba2+, Hg22+ and Pb2+ are insoluble.

5 0

3 years ago

Which of the following is smaller than the atomic radius of beryllium? a. the ionic radius of beryllium b. the atomic radius of

slamgirl [31]

The best quality answer I would say that it is cC

6 0

3 years ago

Which methods will help you properly identify pH with indicator paper? Check all that apply. Set a piece of pH paper in front of

monitta

Set a piece of pH paper in front of each solution before testing to keep organized.

Use a transfer pipet to remove a few drops from the solution to drop onto the paper.

Wait a minute or so before reading color.

Is the correct answer...

4 0

3 years ago

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Water conservation is important for which of the following reasons?

Kay [80]

all of above becuase it's all conservation

3 0

3 years ago

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