All categories

3 years ago

What is the particle unit for SO42-?

2 answers:

8 0

I believe that what is meant here to be particle unit is the elementary charge of the compound SO4^2-. In this case, the whole compound is raised to the power of 2-, therefore the elementary charge is 2-, this is the total electrons that the compound is carrying or sharing. These 2 electrons are being shared with 2 hydrogen atoms to form H2SO4.

Answer:

2-

Bess [88]3 years ago

5 0

Answer: The particle unit is an ion.

Explanation: The unit which is common used for the substances is Mole. 1 mole of anything equals to Avogadro number which is $6.022*10^2^3$ .

For example, 1 mole of an electron equals to $6.022*10^2^3$ electrons,

1 mole of an atom equals to $6.022*10^2^3$ atoms.

So, 1 mole equals to $6.022*10^2^3$ particles.

$SO_4^-^2$ is sulfate ion. So, the particle unit for this will be an ion.

You might be interested in

All of the following are conductors of electricity except

olga55 [171]

Rubber it's not a conductor

4 0

3 years ago

890J of heat are applied to a piece of aluminum, causing a 4.6°C increase in its temperature. The specific heat of aluminum is 0

Semmy [17]

Answer:

The answer would be C 214g

Explanation:

890j of heat causes 4.6°c increase in temperature

specific heat of aluminium after is o.9022 j /g°c

now by using the formula .The mass of aluminium would be c that is 214 g

7 0

3 years ago

The mole fraction of a non-electrolyte (MM 40.0 g/mol) in a saturated aqueous solution is 0.310. What is the molality of the sol

jeka57 [31]

Answer: The molality of non-electrolyte is 24.69 m

Explanation:

We are given:

Mole fraction of saturated aqueous solution = 0.310

This means that 0.310 moles of non-electrolyte is present.

Moles of water (solvent) = 1 - 0.310 = 0.690 moles

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

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

Moles of water = 0.690 moles

Molar mass of water = 18 g/mol

Putting values in above equation, we get:

$0.690mol=\frac{\text{Mass of water}}{18g/mol}\\\\\text{Mass of water}=(0.690mol\times 18g/mol)=12.42g$

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

$\text{Molality}=\frac{n_{solute}\times 1000}{W_{solvent}\text{ (in grams)}}$

Where,

$n_{solute}$ = Moles of solute (non-electrolyte) = 0.310 moles

$W_{solvent}$ = Mass of solvent (water) = 12.42 g

Putting values in above equation, we get:

$\text{Molality of non-electrolyte}=\frac{0.310\times 1000}{12.42}\\\\\text{Molality of non-electrolyte}=24.96m$

Hence, the molality of non-electrolyte is 24.69 m

4 0

3 years ago

Fill in the chart to describe and give examples of physical changes.

frosja888 [35]

Answer:

here are some examples of physical change!!!

Explanation:

-An ice cube melting into water in your drink.

-Freezing water to make ice cubes.

-Boiling water evaporating.

-Hot shower water turning to steam.

-Steam from the shower condensing on a mirror.

8 0

3 years ago

Read 2 more answers

Rb2co3(aq)+fec2h302(aq)-->

nata0808 [166]

Answer:

Rb2CO3(aq)+Fe(C2H3O2)2(aq)--> 2Rb(C2H3O2)(aq) + FeCO3(s)

Explanation:

The reaction shown in the answer is the reaction of rubidium carbonate and iron II acetate. Rubidium is far more reducing than Fe II hence it can displace Fe II from its salt as shown.

The reducing property of metals depends on the value of their individual electrode potential values. For rubidium, its standard reduction potential is -2.98 V while that of Fe II is -0.44V. Hence rubidium can displace Fe II from its salt as shown above.

4 0

3 years ago