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4 years ago

Enter the chemical formula for the cation present in the aqueous solution of AgNO3.

Chemistry

1 answer:

elixir [45]4 years ago

7 0

Answer:

Cation Ag⁺

Explanation:

As a ionic salt, AgNO₃ dissociates in water as this:

AgNO₃ → Ag⁺ + NO₃⁻

It is a completely soluble salt.

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Barium crystallizes in a body-centered cubic system with atoms at all lattice points and an edge length of 5.02 angstroms. Calcu

vagabundo [1.1K]

Answer : The density is, $3.60g/cm^{3}$

Explanation :

Formula used :

$\rho=\frac{Z\times M}{N_{A}\times a^{3}}$ .............(1)

where,

$\rho$ = density = ?

Z = number of atom in unit cell (for BCC = 2)

M = atomic mass of barium = 137.3 g/mole

$(N_{A})$ = Avogadro's number = $6.022\times 10^{23} mol^{-1}$

a = edge length of unit cell = $5.02\AA=5.02\times 10^{-8}cm$

Conversion used : $(1\AA=10^{-8}cm)$

Now put all the values in above formula (1), we get

$\rho=\frac{2\times (137.3g/mol)}{(6.022\times 10^{23}mol^{-1}) \times (5.02\times 10^{-8}cm)^3}=3.60g/cm^{3}$

Thus, the density is, $3.60g/cm^{3}$

5 0

4 years ago

HOW separate water mixture + mothballs?

White raven [17]

You would need to evaporate it

5 0

4 years ago

Given that delta hvap is 58.2 kj/mol and the boiling point is 83.4 c 1atm if one mole of this substance is vaporized at 1atm cal

astraxan [27]

Change in Gibb's free energy of system (ΔG) = ΔH - TΔS.........(Eq. 1)
Now, if magnitude of ΔG <0, then reaction is spontaneous.
if magnitude of ΔG > 0, then reaction is non-spontaneous.
At equilibrium, ΔG = 0
When at boiling point, liquid state is in equilibrium with vapour state. Hence, it present case ΔG = 0

∴ Eq 1 becomes, ΔH = TΔS
here, ΔH = 58.2 kj/mol (Given),
∴ At T = 83.4 oC = 356.4 K, ΔS = 0.1633 kj/mol.K

3 0

3 years ago

1375 J of heat energy are added to a 50.0 g sample of copper, which increases temperature from 22.8 C to 94.2 C. Calculate the s

sergeinik [125]

Answer:

0.385 J/g°C

Explanation:

Using the following formula, the specific heat of an elemental substance can be calculated:

Q = m × c × ∆T

Where;

Q = quantity of heat (J)

m = mass (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

Based on the given information, Q = 1375J, m = 50g, initial temperature = 22.8°C, final temperature = 94.2°C, c =?

Q = m × c × ∆T

1375 = 50 × c × (94.2 - 22.8°C)

1375 = 50 × c × 71.4

1375 = 3570c

c = 1375/3570

c = 0.3851

c = 0.385 J/g°C

3 0

3 years ago

Which of the following is a correct formula unit of an ionic compound?

goldenfox [79]

Answer : The correct formula unit of an ionic compound is Ca(OH)2

Explanation :

An ionic compound is formed when a metal atom donates one or more electrons to a non metal atom.

During this process, metal gains a positive charge and a nonmetal gets a negative charge.

In an ionic compound, these charges on the ions are balanced so that the overall compound is neutral.

Let us check which of the given compounds have a neutral charge.

1) Al2F3 : Charge on Al is +3 and that on F is -1.

The total charge on 2 Al is 2x3 = +6.

The total charge on 3 F atoms is 3x(-1) = -3

The overall charge on the compound is +6-3 = +3.

That means the given formula unit is not correct.

2) Ca2O : Charge on Ca is +2 and that on O is -2

Total charge on Ca is 2x2 = +4

The overall charge is +4-2 = +2

Therefore the given formula unit is not correct.

3) Ca(OH)2 : The charge on Ca ion is +2 and that on OH is -1.

The total charge on 2 OH ions is 2x(-1) = -2

The overall charge is +2-2 = 0

This gives a neutral compound.

Therefore the given formula unit is correct.

6 0

4 years ago

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