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3 years ago

The gram formula mass of a compound is 48 grams. The mass of 1.0 moles of this compound is

Chemistry

1 answer:

ehidna [41]3 years ago

3 0

The gram formula mass is Molar mass. The mass of 1.0 moles is :
3) 48.0 g

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8.41 x 10 to the -7 grams to microgram

mezya [45]

0.841 micrograms is the answer.

If you have any questions, let me know.

6 0

2 years ago

Is the solution containing 0.20 M Pb2 and 0.10 M Cl (Ksp 1.6x105) a) saturated, b) unsaturated, c) at equilibrium, d) none of th

raketka [301]

Answer : The correct option is, (b) unsaturated

Explanation :

Ionic product : It is defined as the product of the concentrations of the ions present in solution raised to the same power by its stoichiometric coefficient in a solution of a salt. This takes place at any concentration. The ionic product is represented as, Q.

Solubility product constant : It is defined as the product of the concentration of the ions present in a solution raised to the power by its stoichiometric coefficient in a solution of a salt. This takes place at equilibrium only. The solubility product constant is represented as, $K__{sp}$ .

Now we have to calculate the ionic product of given solution.

The balanced chemical reaction is,

$PbCl_2(aq)\rightarrow Pb^{2+}(aq)+2Cl^-(aq)$

The expression of ionic product will be,

$Q=[Pb^{2+}][Cl^-]^2$

$Q=(0.20)\times (0.10)^2$

$Q=0.002$

The ionic product of solution is, 0.002

There are three cases for the solubility :

When $Q$ this means that the solution is unsaturated solution and more solid will be dissolve.

When $Q=k_{sp}$ this means that the solution is saturated solution.

When $Q>k_{sp}$ this means that the solution is supersaturated solution and solid will be precipitate.

From this we conclude that the value of $k_{sp}=1.6\times 10^5$ is greater than the ionic product that means the solution is unsaturated solution and more solid will be dissolve.

Hence, the correct option is, (b) unsaturated

6 0

3 years ago

A student has 2 rubber balls of the same size and weight. Ball A is still and Ball B is rolling.Ball B hits Ball A, and Ball A s

Akimi4 [234]

Answer:

It starts to move because of Newtons first law "An object will not change it's motion unless a force acts on it"

Explanation:

Meaning ball B is that force acting upon ball A

6 0

2 years ago

If the solid copper starts off at the normal melting temperature of copper and the liquid copper is put into the mold at the cry

Agata [3.3K]

Heat of what? This is an unclear question.

3 0

2 years ago

- 5. Describe the general trend in atomic radil across a row of the periodic table.

sattari [20]

Answer:

Across a row, atomic radii decreases.

Explanation:

It decreases because nuclear charge increases across a row, electrons are added to the same shell and shielding remains constant. Therefore the outer electrons are more attracted to the nucleus making the atom smaller.

8 0

2 years ago