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madreJ [45]
4 years ago
15

Help not answers!!! Please.

Chemistry
1 answer:
Alecsey [184]4 years ago
8 0
<span>Particles in gas are best described as-hard spheres with insignificant volumes. The atmospheric pressure below sea level is higher.</span>
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If 1.50g lead(II) nitrate is reacted with 1.75g sodium chromate what is the theoretical yield of the precipitate?
egoroff_w [7]

Answer:

1.46g of PbCrO₄ are the theoretical yield

Explanation:

Theoretical yield is defined as the maximum amount of products that could be produced (Assuming a yield of 100%).

The reaction of Lead (II) nitrate with sodium chromate is:

Pb(NO₃)₂(aq) + Na₂CrO₄(aq) → PbCrO₄(s) + 2NaNO₃ (aq)

First, we need to find molar mass of each reactant in order to determine limiting reactant (As the reaction is 1:1, the reactant with the lower number of moles is the limiting reactant). The moles of the limiting reactant = moles of Lead (II) chromate (The precipitate):

<em>Moles Pb(NO₃)₂ -Molar mass: 331.21g/mol-</em>

1.50g * (1mol / 331.21g) = 4.53x10⁻³ moles Pb(NO₃)₂

<em>Moles Na₂CrO₄ -Molar mass: 161.98g/mol-</em>

1.75g * (1mol / 161.98g) = 0.0108 moles

Pb(NO₃)₂ is limiting reactant and moles of PbCrO₄ are 4.53x10⁻³ moles. The mass is:

4.53x10⁻³ moles PbCrO₄ * (323.19g / mol) =

<h3>1.46g of PbCrO₄ are the theoretical yield</h3>
7 0
3 years ago
Which type of isomers are o-xylene, m-xylene, and p-
mojhsa [17]

The  o-xylene, m-xylene, and p-Xylene are constitutional isomers. The correct option is D.

<h3>What are isomers?</h3>

Isomers are the elements or polyatomic elements that have similar molecular formula.

All options are attached here:

A.optical isomers

B.structural isomers

C.geometric isomers

D.constitutional isomers

Thus, the correct option is D.constitutional isomers.

Learn more about isomers

brainly.com/question/13422357

#SPJ1

4 0
2 years ago
The temperature at which carbon dioxide sublimes is about 195 K. What is this
Rom4ik [11]
This temperature in units of degree Celsius is..

-78° Celsius
3 0
3 years ago
I need help with 5 and 6!!
liberstina [14]

Answer:

As the axial tilt increases, then the seasonal contrast increases so that winters are colder and summers are warmer in both hemispheres. The northern hemisphere is tipped away from the Sun, producing short days and a low sun angle. What kind of effect does the earth's tilt and subsequent seasons have on our length of daylight (defined as sunrise to sunset). Over the equator, the answer is not much.

As for #5, it's mixed at the end of my answer, but just remember the spring equinox marks the change from 24 hours of darkness to 24 hours of daylight at Earth's poles .

6 0
3 years ago
Which diagram shows a pair of electrons that have opposite spins?<br> 011<br> 1<br> 011<br> o 11h
Neporo4naja [7]

Answer:

1 one is the right........

5 0
3 years ago
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