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nexus9112 [7]
3 years ago
15

Enter the complete ionic equation to show the reaction of aqueous lead(ii) nitrate with aqueous potassium sulfate to form solid

lead(ii) sulfate and aqueous potassium nitrate. express your answer as a chemical equation. identify all of the phases in your answer.
Chemistry
1 answer:
andreyandreev [35.5K]3 years ago
8 0
Pb(NO3)2(aq) + K2SO4(aq) --> PbSO4(s) + 2KNO3(aq) 

<span>Total ionic equation: </span>

<span>Pb 2+ (aq) + 2NO3- (aq) + 2K+ (aq) + SO4 2- (aq) ---------> PbSO4 + 2K+ (aq) + 2NO3- (aq) </span>

<span>For the net ionic equation cancel out species found on both sides to get: </span>

<span>Pb 2+ (aq) + SO4 2- (aq) ----------> PbSO4(s) </span>

<span>Note aqueous species dissolve and are separated into their ions but solid ones do not and simply precipitate out of solution.</span>
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Show a correct numerical setup for calculating the
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0.25 moles of CO2 is present in 11 grams of CO2.

Explanation:

A mole represents the number of chemical entities in an element or molecule.

Number of moles of an element or molecule is determined by the formula:

The Number of moles (n) = weight of the atom given  ÷ atomic or molecular weight of the one mole of the element or molecule.

Themolar mass of one mole of carbon dioxide is:

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= 44 gram/mole

The given weight is 44 grams of carbon dioxide.

Putting the values in the equation,

n= 11 gms÷44 gms/ mole

n   = 0.25 mole

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3 years ago
If you were asked to convert 4.2 × 1022 atoms of aluminum to moles, which of the following should you use for the conversion?
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If in the following diagram the substance is in the solid state during stage 1, what is happening during stage 2?
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If in the following diagram the substance is in the solid state during stage 1,  during stage 2 the substance is boiling or condensing .
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Determine the expected diffraction angle for the first-order diffraction from the (111) set of planes for FCC nickel (Ni) when m
faust18 [17]

Answer:

56°

Explanation:

First calculate a:

a=2 R \sqrt{2}=2(0.1246) \sqrt{2}=0.352 \mathrm{nm}

The interplanar spacing can be calculated from:

d_{111}=\frac{a}{\sqrt{1^{2}+1^{2}+1^{2}}}=\frac{0.352}{\sqrt{3}}=0.203 \mathrm{nm}

The diffraction angle is determined from:

\sin \theta=\frac{n \lambda}{2 d_{111}}=\frac{1(0.1927)}{2(0.2035)}=0.476

Solve for \theta

\theta=\sin ^{-1}(0.476)=28^{\circ}

The diffraction angle is:

2 \theta=2\left(28^{\circ}\right)=56^{\circ}

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