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2 years ago

2. Solid sodium reacts with gaseous chlorine to produce sodium chloride.

Chemistry

1 answer:

stich3 [128]2 years ago

8 0

2Na (s) + Cl2 (g) = 2NaCl (s)

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Which of the following statements best describes what happens to water during vaporization?

ss7ja [257]

Answer: im pretty sure its D

Explanation:

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3 years ago

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The solubility product of PbI2 is 7.9x10^-9. What is the molar solubility of PbI2 in distilled water?

Agata [3.3K]

<u>Answer:</u> The molar solubility of $PbI_2$ is $1.25\times 10^{-3}mol/L$

<u>Explanation:</u>

Solubility is defined as the maximum amount of solute that can be dissolved in a solvent at equilibrium.

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

The balanced equilibrium reaction for the ionization of calcium fluoride follows:

$PbI_2\rightleftharpoons Pb^{2+}+2I^-$

s 2s

The expression for solubility constant for this reaction will be:

$K_{sp}=[Pb^{2+}][I^-]^2$

We are given:

$K_{sp}=7.9\times 10^{-9}$

Putting values in above equation, we get:

$7.9\times 10^{-9}=(s)\times (2s)^2\\\\7.9\times 10^{-9}=4s^3\\\\s=1.25\times 10^{-3}mol/L$

Hence, the molar solubility of $PbI_2$ is $1.25\times 10^{-3}mol/L$

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2 years ago

When exothermic reactions occur, ______________.

marusya05 [52]

Answer:

heat energy is released into the surrounding

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2 years ago

QUICK! WILL MARK BRAINLIEST

nalin [4]

Answer:

Ability to be bent = Malleability

Identity = Physical Change

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Dissolve = Solubility

Color, Phase, or Hardness = Physical Property

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3 years ago

Chemical equation=CH4 + O2 = CO2 + H2O.

tankabanditka [31]

Answer:

1.The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants.

Explanation:

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3 years ago