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Pani-rosa [81]
3 years ago
7

How many moles of MgBr2 would you have if you had 7.0 grams of magnesium bromide?

Chemistry
1 answer:
RoseWind [281]3 years ago
7 0

Answer:

option A

Explanation:

Because i took the test

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A mixture of 0.220 moles rn, 0.350 moles o2 and 0.640 moles ar has a total pressure of 2.95 atm. what is the pressure of o2? a m
EastWind [94]

Answer:

0.85 atm

Explanation:

We start by getting the total number of moles of all gases.

Total moles = 0.220 + 0.350 + 0.640 = 1.21 mol

Then we get the fraction of Oxygen moles and multiply by the total pressure;

The pressure of O2 = 0.350 mol / 1.21 mol x 2.95 atm  

                                = 0.85 atm

8 0
4 years ago
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The element Co exists in two oxidation states, Co(II) and Co(III), and the ions form many complexes. The rate at which one of th
OLEGan [10]
Tomato potato A is the answer fo sho
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3 years ago
Starting with acetylene and bromoethane, show how you would use reagents from the table to synthesize 3-hexanone.
Jobisdone [24]

solution:

A = 192 x (1/2) ^ (15/5) = 192 x (1/2) ^3 = 192 x 1/8 = 24 mg

 Starting by hitting acetylene with NaNH2 to deprotonate, this C-- will attack the C connected to the Br Sn2 style to lengthen the chain by two carbons.  

Do this same thing again with the other CH of the acetylene and another bromoethaneto get a six carbon chain, namely, 3-hexyne.  

Now, reduce the alkyne to an alkene via H2/Pd/C, and that gives 3-hexene.  


3 0
3 years ago
Evan and his friends are working on a group project on matter. Michelle says that matter is anything that has mass. Ricky says m
Novay_Z [31]

Answer:

Leon

Explanation: all take up space and will have a mass to it.

8 0
3 years ago
During which change of state would the volume of a substance increase the most?
Alika [10]

Answer:

The most state has the high volume is the gas state.

So here the answer is vaporization!!!!

Explanation:

The most state has the high volume is the gas state.

So here the answer is between vaporization and sublimation???

and when the sublimation is: the change of the material from the solid state to the gas state directly without pass to liquid state from the solid first then to the gas

and the vaporization is : The change of the material from the liquid state to the gas state by heating Ex: water vaporize at 100°

here, the answer is sublimation because the difference of volume which resulted from this process is more than the volume resulted from vaporization.

Plz mark brainlist!!

4 0
3 years ago
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