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Ainat [17]
3 years ago
9

A physical change is ...

Chemistry
1 answer:
AnnZ [28]3 years ago
5 0

Answer:

the answer is c I just took the test

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A student needed to dissolve a substance that she knew was soluble in water. according to the chart, which other solvent would m
Dmitry [639]
The chart is attached below and the options are as follow,

A Benzene

B Methanol

C Hexane

D Octane

Answer:
             Option-B (Methanol) is the correct answer.

Explanation:
                    As we know that the substance given to student is soluble in water. Therefore, those substances which are soluble in water are polar in nature because water is polar in nature and Like Dissolves Like.
                    Hence, in chart it can easily be seen that Methanol is also polar in nature due to presence of -O-H (polar) bond. So, the substance will dissolve in it.

8 0
3 years ago
If 27 ml of 6.0 m h2so4 was spilled, what is the minimum mass of nahco3 that must be added to the spill to neutralize the acid?
katrin [286]

The minimum mass of NaHCO3 that  must be added to the spill to neutralize the acid is 27.216 grams


<h3>calculation </h3>

write the balanced chemical equation

2NaHCO3 +H2SO4 → Na2SO4  +2H2O +2CO2

find the moles of H2SO4 = molarity x volume in liters

volume in liters =  27/1000=0.027 l

moles is therefore= 0.027 x6=0.162 moles

by use of mole ratio of  NaHCO3: H2SO4  which is 2:1 the moles of NaHCO3=0.162 x2=0.324 moles


mass of NaHCO3= moles of NaHCO3 x molar mass of NaHCO3(84g/mol)

= 84g/mol x 0.324=27.216 grams

8 0
4 years ago
Read 2 more answers
PLease help me with this question
lukranit [14]
The answer is 6 because the number of chlorine is 2 so if you have 6 moles of chlorine the answer is 6
7 0
3 years ago
Read 2 more answers
How do kidneys work with other body systems to maintain homeostasis?
marissa [1.9K]
Kidneys work with other body systems to maintain homeostasis by working with other body systems such as the respiratory system.
8 0
4 years ago
How many black men were studied in the Tuskegee experiment?
anygoal [31]

Answer:

600 black men

Explanation:

309 with syphilis and 201 did not have the disease

4 0
3 years ago
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