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defon
3 years ago
6

Lift up the glass in one bowl, and place an effervescent tablet in the water beneath it. Quickly place the inverted glass over t

he tablet, and repeat the procedure with the other bowl. Note the changes in the water level and the air space in both glasses, and write down your observations.
Chemistry
1 answer:
Ugo [173]3 years ago
6 0

The glass containing the effervescence tablet has a greater air space than the other.

<h3>What is effervescence?</h3>

The term effervescence refers to the evolution of a gas. An effervescence tablet is a tablet that is designed to release the gas called carbon dioxide.

When we add the effervescence tablet and compare the level of the water in the two bowls, we will see that the water in the glass containing the effervescence tablet has a greater air space than the other.

Learn more about carbon dioxide:brainly.com/question/14445045

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Answer: The balloons volume would increase.

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3 years ago
Draw the mechanism for the addition of methylmagnesium bromide to propanoyl chloride (CH3CH2COCl) to give 2-methyl-2-butanol.
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Answer:

Reaction mechanism has been given below

Explanation:

  • Propanoyl chloride contains an electrophilic carbonyl center to give  nucleophilic acyl substitution reaction by removing Cl group with a strong nucleophile like methylmagnesium bromide.
  • Two equivalent of methyl magnesium bromide react with cabonyl center followed by protonation of negatively charged oxygen atom gives 2-methyl-2-butanol.
  • In the first step, nucleophilic acyl substituion occurs. In the second step, nucleophilic addition occurs. In the third step, protonation occurs.
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3 years ago
A student was asked to determine the concentration of ammonia, a volatile substance used in the clinical setting as a respiretor
UNO [17]

This question is describing two chemical equations whereby the concentration of ammonia has to be determined. The first reaction is between 25.00 mL of ammonia and 50.00 mL of 0.100-M HCl whose excess was neutralized with 21.50 mL of 0.050-M Na₂CO₃ and thus, the concentration ammonia in the cloudy solution was determined as 0.114 M.

First of all we need to go over the titration of the excess HCl with Na₂CO₃ by writing the chemical equation it takes place when they react:

2HCl+Na_2CO_3\rightarrow 2NaCl+CO_2+H_2O

Whereas the mole ratio of HCl to Na₂CO₃ is 2:1 and the volume of the HCl leftover is determined as follows:

V_{HCl}^{leftover}=\frac{2*0.050M*21.50mL}{0.100M} =21.5mL

Next, we infer that the consumed volume of HCl by the ammonia solution was:

V_{HCl}^{consumed}=50.00mL-21.50mL=28.5 mL

Then, we write the chemical equation that takes place between ammonia and HCl:

HCl+NH_3\rightarrow NH_4Cl

Whereas the mole ratio is now 1:1, which means that the concentration of ammonia was:

M_{NH_3}=\frac{28.5mL*0.100M}{25.00mL}\\\\ M_{NH_3}=0.114M

Learn more:

  • (Titration) brainly.com/question/15687419
  • (Titration) brainly.com/question/25328286
8 0
2 years ago
How does the number of valence electrons in an atom relate to the element's
Oduvanchick [21]
The believe the answer is A
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4 years ago
The nitrogenous base adenine is found in all members of which group?
svetoff [14.1K]

Answer:

<h2>ATP, RNA, NAD and DNA.</h2>

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Adenine is a nitrogenous base which is found in ATP, RNA. NAD, FAD and DNA. adenine pairs with thymine in DNA synthesis.

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