1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jolli1 [7]
3 years ago
10

For each item, choose whether the change is a physical change or chemical change

Chemistry
1 answer:
Aleonysh [2.5K]3 years ago
8 0

Sorry, but where are the ‘items’?

You might be interested in
What is/are the principal product(s) formed when excess methylmagnesium iodide reacts with p-hydroxyacetophenone?
Montano1993 [528]

The end product will depend upon

a) the amount of the reagent taken

b) the final treatment of the reaction

If we have just taken methylmagnesium iodide and p-hydroxyacetophenone, then we will get methane and hydroxyl group substituted with MgI in place of hydrogen

Figure 1

However if we have taken excess of methylmagnesium iodide which is Grignard's reagent followed by hydrolysis we will get different product

Figure 2

5 0
3 years ago
2-phosphoglycerate(2PG) is converted to phosphoenolpyruvate (PEP) by the enzyme enolase. The standard free energy change(deltaGo
pogonyaev

Answer:

The correct option is: (D) -2.4 kJ/mol

Explanation:

<u>Chemical reaction involved</u>: 2PG ↔ PEP

Given: The standard Gibb's free energy change: ΔG° = +1.7 kJ/mol

Temperature: T = 37° C = 37 + 273.15 = 310.15 K    (∵ 0°C = 273.15K)

Gas constant: R = 8.314 J/(K·mol) = 8.314 × 10⁻³ kJ/(K·mol)     (∵ 1 kJ = 1000 J)

Reactant concentration: 2PG = 0.5 mM

Product concentration: PEP = 0.1 mM

Reaction quotient: Q_{r} =\frac{\left [ PEP \right ]}{\left [ 2PG \right ]} = \frac{0.1 mM}{0.5 mM} = 0.2

<u>To find out the Gibb's free energy change at 37° C (310.15 K), we use the equation:</u>

\Delta G = \Delta G^{\circ } + 2.303 R T log Q_{r}

\Delta G = 1.7 kJ/mol + [2.303 \times (8.314 \times 10^{-3} kJ/(K.mol))\times (310.15 K)] log (0.2)

\Delta G = 1.7 + [5.938] \times (-0.699) = 1.7 - 4.15 = (-2.45 kJ/mol)

<u>Therefore, the Gibb's free energy change at 37° C (310.15 K): </u><u>ΔG = (-2.45 kJ/mol)</u>

4 0
3 years ago
Which pH corresponds to the equivalence point for the graph below?
Evgen [1.6K]
Answer 10
Explication nose
7 0
3 years ago
Every object in the universe is always exerting force and is measured as
bonufazy [111]
Gravity, its what holds the whole universe together
6 0
3 years ago
Describe the characteristics that all living<br> things share.
andriy [413]

Answer:

Order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.

6 0
3 years ago
Other questions:
  • What did ruthorford discover that thomson did not understand
    5·1 answer
  • In a __________ change the identity of the substance is
    11·1 answer
  • During the bromination <br> of methane the free radical Ch3 is generated
    10·2 answers
  • What is the full form of DNA​
    8·2 answers
  • A quantity of liquid methanol, CH 3OH, is introduced into a rigid 3.00-L vessel, the vessel is sealed, and the temperature is ra
    9·1 answer
  • Name ways we use technology in inner and outer space<br> 8th grade science btw
    9·1 answer
  • How many moles of gas are in a room with a volume of 85.0 L? A light bulb in the same room at the same temperature and pressure
    9·1 answer
  • What is X ? <br> A-ethanol <br> B-hydrogen<br> c-methane<br> D-uranium
    13·2 answers
  • A student combines a clear, dark blue solution with a clear, colorless solution and agitates the test tube. The combination resu
    14·1 answer
  • After writing and balancing the equation, what's the next step in using bond energies to calculate the enthalpy of a reaction? Q
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!