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lilavasa [31]
4 years ago
7

ONLY 3 QUESTIONS

Chemistry
1 answer:
jarptica [38.1K]4 years ago
7 0
A. The hydrogen molecule has a structural formal that looks like this: H—H. The oxygen molecule has a structural formula that looks like this: O=O (except you should make the lines longer). When you combine the molecules, it has a structural formula that looks like this:  
                                                            O
                                                          /     \
                                                        H      H

b. O=C=O (again, make the lines a little longer)

c. space-filling model of hydrogen looks like this oo (circles should be touching) and the space-filling model of carbon dioxide should look like this OoO (circles should be touching)

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A quantity of gas weighing 7.1 g at 741 torr and 44 celius occupies 5.41 L. Find its molar mass.
Aleks04 [339]
1 atmosphere = 760 torr
R = 0.082
44 degrees Celsius = 317 degrees Kelvin

PV=NRT\\ \frac{744}{760}(5.41)=N(0.082)(317)\\ \frac{4025.04}{760}=25.994N\\\frac{4025.04}{19755.44}=N\\N=\frac{50313}{246943}\\0.203743
3 0
3 years ago
What is the vapor pressure of the pure solvent if the vapor pressure of a solution of 10 g of sucrose (C6H12O6) in 100 g of etha
amid [387]

Answer:

56.4 mmHg

Explanation:

Given:

Vapor pressure of the solution, P solution = 55 mmHg

The mass of sucrose (C₆H₁₂O₆) = 10 g

Also, Molar mass of sucrose (C₆H₁₂O₆) = 180 g/mol

So, moles = Given mass/ molar mass

Hence, moles of sucrose in the solution = 10 g / 180 g/mol = 0.05556 mol

Given that: Mass of ethanol = 100 g

Molar mass of ethanol = 46 g/mol

Hence, moles of ethanol = 100 g / 46 g/mol = 2.174 mol

Mole fraction of solvent, ethanol is:

X ethanol = 2.174 mol / (2.174 + 0.05556) mol = 0.975

Applying Raoult's Law

P solution = X ethanol*P° ethanol

<u> => P° ethanol  = P solution / X ethanol  = 55 mmHg / 0.975 = 56.4 mm Hg</u>

6 0
4 years ago
Read 2 more answers
Does neon form a salt when combined with a metal?
Sever21 [200]
No Neon<span> is a member of the noble gas family. Other elements in this family includes </span><span>helium, argon, krypton, xenon, </span><span>and </span><span>radon. </span><span>These gases are in </span>Group 18<span> (VIIIA) of the periodic table. The periodic table is a chart that shows how chemical elements are related to each other. The noble gases are sometimes called the inert gases. This name comes from the fact that these elements do not react very readily. In fact, compounds exist for only three noble gases—krypton, radon, and xenon. Chemists have yet to prepare compounds of helium, neon, or </span>argon.<span>


</span>
6 0
3 years ago
Given two adjacent vertices of a parallelogram A (3,5), B (1,7) and the point of intersection of their diagonals M (1,1), determ
just olya [345]

HOPE YOU UNDERSTAND. PLEASE MARK IT AS BRAINLIEST

Answer:

A (3,5), B (1,7) ,C(-1,-3),D(1,-5)

Explanation:

M[1,1]=                                  [Diagonals bisect each other]

[ \frac{x_{1} + x_{2}}{2} , \frac{y_{1} + y_{2}}{2}]\\(\frac{3+x_{2} }{2} , \frac{5+y_{2} }{2})\\\frac{3+x_{2} }{2}=1 , \frac{5+y_{2} }{2}=1\\3 + x_{2} = 2  ,  5 + y_{2} = 2\\x_{2} = -1   ,  y_{2} = -3\\\\

C(-1,-3)

M[1,1]=                                     [Diagonals bisect each other]

[\frac{x+1}{2} , \frac{y+7}{2}]\\\frac{x+1}{2}=1  ,  \frac{y+7}{2}=1\\x+1=2  ,  y+7=2\\x=1, y=-5

D(1,-5)

hence,

A (3,5), B (1,7) ,C(-1,-3),D(1,-5)

                 

8 0
4 years ago
How many milliliters are in a half gallon?
Anettt [7]
1892.71 milliliters in a half gallon.
6 0
3 years ago
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