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
Likurg_2 [28]
3 years ago
15

Which statement is correct?

Chemistry
1 answer:
rosijanka [135]3 years ago
4 0

Answer:

B. Chemical changes produce new substances; physical changes do not.

Explanation:

Physical changes only alter appearances, while chemical changes are interactions that create new chemical formulas.

You might be interested in
Measurements show that the enthalpy of a mixture of gaseous reactants increases by 130. kJ during a certain chemical reaction, w
3241004551 [841]

Answer:

167 kJ

Explanation:

Given parameters

Change in enthalpy = 130 kJ (decrease)

Work done = -137 kJ

Change in energy, \delta = ?  

From the first law of thermodynamics:

ΔH = ΔE + PΔV,

Where, ΔH= change in enthalpy

ΔE = change in Internal energy  

Substituting values into the above formula —  

130 kJ = ΔE + -137  kJ

130 kJ = ΔE - 137 kJ

therefore,

ΔE = (130 + 137 ) kJ

ΔE = 167 kJ

Therefore, the change in energy of the gas mixture during the reaction is 167 kJ.  

Since the value of energy change Is positive, therefore this Is endothermic reaction  

6 0
3 years ago
F r eeeeee points take em alllll while u still can:P
Llana [10]

Answer:

bro this is v poggers

Explanation:

Thank u very much i re epicc

6 0
3 years ago
Read 2 more answers
Convert 112KPa to atm
Ugo [173]

Answer:

1.10535

Explanation:

6 0
4 years ago
Why alkenes are more reactive than alkynes
dangina [55]

Answer:

ef 5

Explanation:

rwb

7 0
3 years ago
Blood is brought by the veins to the lungs to become oxygenated. Oxygenation occurs at the small structures of the lungs called
Licemer1 [7]

Answer:

Where does the exchange of the blood in the veins and oxygen in the lungs take place?

ALVEOLI are the very small air sacs where the exchange of oxygen and carbon dioxide takes place. CAPILLARIES are blood vessels in the walls of the alveoli. Blood passes through the capillaries, entering through your PULMONARY ARTERY and leaving via your PULMONARY VEIN

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • a 3.50L sample of neon gas has a pressure of .950atm at 20c what would the volume be if the pressure increased to 1.50atm and th
    11·1 answer
  • liz is examing a plant cell under a Microscope she seems many small green oranganelles inside the cell
    15·1 answer
  • the elements found in family 1 of the periodic table are soft they they can cut with a knife. what other propert do these metals
    9·2 answers
  • Explain the difference between a base unit and a derived unit
    12·2 answers
  • Complete the chemical equation for the formation reaction of ethyl alcohol (C2H5OH,l) from its constituent elements in their sta
    10·1 answer
  • How many molecules of oxygen are in 3.0 moles of oxygen?
    13·2 answers
  • Good morning guys :)
    10·2 answers
  • A certain liquid X has a normal boiling point of 133.60°C and a boiling point elevation constant Kb= 2.46°C kg mol^-1.Calculate
    5·1 answer
  • What are the function of a objective lens and the ocular lenses
    12·2 answers
  • How do dominant genes and recessive genes affect taste?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!