What period is Pb in

Answers

Answer 1
Answer:

Pb (lead) is in the 6th period

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Ok another chemistry question! This is another question that I can)t solve

Is it okay for a 13 yr old girl to ask out a 16 yr old boy if they really like them?..

Answers

No, because a child under the age of 16 does not have the right to engage in such relationships and it's punishable by law if the relationship becomes intimate.

no that is inappropriate he could go to jail!

What best explains the type of energy present in the vibrating atoms of a substance

Answers

The type of energy present in the vibrating atoms of a substance is a thermal energy and it is a kinetic type of energy. It is associated with movement within the crystal lattice of substance. ... Eventually, it can lead to motion of the atoms which is a form of kinetic energy.

How many grams of CO2 are in 2.1 mol of the compound?a. 21.0 g
b. 44.0 g
c. 66.0 g
d. 92.4 g

Answers

Molar mass CO₂ = 44.0 g/mol

1 mole ------- 44.0 g
2.1 mole ----- > ?

g = 44.0 * 2.1 / 1

g = 92.4 / 1

= 92.4 g

answer d

hope this helps!

How much smaller is an electron than a proton​

Answers

Answer:

An electron is around 1800 times smaller than a proton

Explanation:

Which is the solubility product expression for Na3PO4(s)?A. [Na] +3(PO4)3-

B. [Na +3] / [PO43-]

C. [Na +] }[PO43-)

D. [Na] +3/[PO4) 3 -

Answers

Final answer:

The solubility product expression for Na3PO4(s) is [Na+]^3[PO4^3-], which denotes the ion concentration in the solution after the dissolution of sodium phosphate. therefore, option A is correct

Explanation:

The solubility product expression for Na3PO4(s) would be written as [Na+]^3[PO4^3-]. The solubility product, Ksp, is the equilibrium constant for the dissolution of a sparingly soluble substance. The solubility product expression depends on the stoichiometry of the dissolution reaction. Sodium phosphate, Na3PO4, dissociates in water into 3 sodium ions, Na+, and 1 phosphate ion, PO4^3-. Therefore, the solubility product expression is [Na+]^3[PO4^3-], where [Na+] and [PO4^3-] represent the molar concentration of these ions in the solution.

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Final answer:

The solubility product expression of Na3PO4 is not among the given options because Na3PO4 is soluble in water and for soluble compounds, we don't write a solubility expression.

Explanation:

The solubility product expression is typically written for an ionic compound that is sparingly soluble in water. The solubility product expression of Na3PO4 is not among the options you've provided because every ionic compound has its own specific solubility product expression. Na3PO4 is soluble, so we don't write a solubility expression for it. In general, for a reaction where a solid dissolves in water such as A3B (s) ↔ 3A+ (aq) + B3- (aq), the solubility product expression would be [A+]^3 [B3-].

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Unlike kinetic energy, potential energy is a. energy of motion. b. stored. c. conserved. d. not measurable.

Answers

Potential energy is B: Stored energy because the energy is at rest.
Unlike kinetic energy, potential energy is stored. 

Potential energy is energy at rest.