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Serggg [28]
3 years ago
15

BRAINLIEST IF CORRECT PLEASE USE WORK BONUS POINTS

Chemistry
2 answers:
Ipatiy [6.2K]3 years ago
8 0

i think the answer is A. Physical and chemical changes

cricket20 [7]3 years ago
5 0

the answer is <em>a} physical and chemical changes</em>

You might be interested in
Question 3 (1 point)
antoniya [11.8K]

An electrochemical process involves any process that has to do with the transfer of elecrons.

<h3>What is an elecrochemical process?</h3>

An electrochemical process involves any process that has to do with the transfer of elecrons. These process include redo reactionand electron transport chains.

It is a true statement that the actiivity series helps to detect the products in a reaction because a metal that is lower in the series is always displaced by a metal that is higher in the series.

Learn more about electrochemical processess: brainly.com/question/12034258

6 0
2 years ago
Briefly discuss interpretations of your observations and results. Include in your discussion, any conclusions drawn from the res
VMariaS [17]

Answer:

In comparison to Part 1 of this experiment, we observed similar reactions when determining the make up of our unknown. When testing for Mn2+ we observed a color change that resulted in a darker brown/red color, when testing for Co2+ we observed the formation of foamy bubbles but we could not conclude that a gas had formed, when testing for Fe3+ the result was a liquid red in color, when testing for Cr3+ we observed no change, when testing for Zn2+ we observed the formation of a pink/red liquid, when testing for K+ we observed the formation of a precipitate, when testing for Ca2+ we observe the formation of a precipitate. Sources of error may have occurred when observing whether or not an actual reaction had taken place or not, using glassware that wasn't fully cleaned, or the accidental mix of various other liquids in the lab

Explanation:

4 0
3 years ago
Instead of using ratios for back titrations we can also use molarities, if our solutions are standardized. A 0.196 g sample of a
kvv77 [185]

Answer:

The mass percent of Al(OH)₃ is 15.3%

Explanation:

The reaction is:

Al(OH)₃ + 3HCl = AlCl₃ + 3H₂O

The excess acid is neutralized with a solution of sodium hidroxide, in the reaction:

NaOH + HCl = NaCl + H₂O

The total moles of HCl is:

n_{HCl,total} =M_{HCl} *V_{HCl} =0.111*0.025=2.78x10^{-3} moles

From the second titration, the moles of excess of HCl is:

n_{HCl,excess} =n_{NaOH} =M_{NaOH} *V_{NaOH} =0.132*0.01105=1.46x10^{-3} moles

The difference between the total and excess of HCl, it can be know the moles that reacts with the aluminum hydroxide, is:

n_{HCl,reacts} =n_{HCl,total}-n_{HCl,excess} =2.78x10^{-3} moles-1.46x10^{-3} moles=1.32x10^{-3} moles

The ratio between HCl and Al(OH)₃ is 3:1. The MW for aluminum hydroxide is 78 g/mol, thus:

m_{Al(OH)3} =1.32x10^{-3} molesHCl*\frac{1molAl(OH)3}{3molesHCl} *\frac{78gAl(OH)3}{1molAl(OH)3} =0.03g

The percentage of Al(OH)₃ is:

Percentage-Al(OH)3=\frac{m_{Al(OH)3} }{m_{antiacid} } *100=\frac{0.03}{0.196} =15.3%

3 0
3 years ago
If an automobile is able to travel 264 km on 23.3 L of gasoline, what is the gas mileage in miles per gallon?
Sphinxa [80]

264.7miles per gallon

Explanation:

Given parameters:

Distance traveled = 264km

volume of gasoline = 23.3L

Unknown:

Gas mileage  = ?

Solution:

We are to solve for the Gas mileage in miles per gallon. This will show how much gas was used per miles covered.

Convert km to miles

                liters to gallon

    1mile = 1.609km

     1liter = 0.264gallon

In miles; \frac{264}{1.609} = 164.1miles

    23.3L  =  23.3 x 0.264 = 0.62gallon

 miles per gallon = \frac{164.1 miles }{0.62gallon} = 264.7miles per gallon

learn more:

Speed brainly.com/question/10177389

#learnwithBrainly

3 0
3 years ago
Carbon dioxide is used by plants for ___?​
AysviL [449]

Answer:

photosynthesis

Explanation:

that's the way plants feed themselves

5 0
3 years ago
Read 2 more answers
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