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
Anon25 [30]
3 years ago
15

Please help fast

Chemistry
1 answer:
Andrews [41]3 years ago
5 0

Answer:  Change in energy

Explanation:  The only evidence provided in the experimental statement is that the "solution turns warm."  While the options include positive evidence of a chemical reaction, only "Change in energy" provides <u>both</u> evidence and correlation with an observation.

You might be interested in
Por qué razón se fomenta la inmigración Europea?​
Morgarella [4.7K]

Hola aquí va la respuesta!

Se fomentó la inmigración europea porque la economía no era buena y vinieron a Paraguay para mejorar su situación.

8 0
3 years ago
Read 2 more answers
HELPPPPPPPP <br> I NEEED TO PASS
Monica [59]
I believe it might be c I might wrong
7 0
3 years ago
Read 2 more answers
The atomic number of carbon is 6. carbon-14 is heavier than carbon-12 because the atomic nucleus of carbon-14 contains _____ neu
RSB [31]
14-6=8
8 neutrons is the answer
6 0
4 years ago
Blank c2h4 + blank o2 → blank co2 + blank h2o how many moles of o2 are in the chemical equation when balanced using the lowest w
umka21 [38]

The reaction is<span>
C</span>₂H₄ + O₂ → CO₂ + H₂O<span>

To balance the equation, both side have same number of elements. Here,</span>

In left hand side has                                            in right hand side has

           4 H atoms                                                       2 H atoms 

           2 C atoms                                                       1 C atom 

<span>           2 O atoms                                                       3 O atoms 

First, we have to balance number of C atoms and number of H atoms in both side.  
To balance C atoms, '2' should be added before CO</span>₂ and to balance H atoms, '2' should be added before H₂<span>O. 
Then number of oxygen atoms is </span>2 x 2 + 2 = 6 in right hand side. So, 3 should be added before O₂<span> in left hand side.
After balancing the equation should be,</span>

C₂H₄<span> + 3O</span>₂<span> → 2CO</span>₂<span> + 2H</span>₂O


8 0
3 years ago
Which is a single ringed nitrogeo base?<br><br> A)adenine<br> B)guanine<br> C)thymine<br> D)ribose
pogonyaev
A single ringed nitrogeo base is thymine (C)

3 0
3 years ago
Other questions:
  • Thiamine (vitamin B1) deficiency diseases have a lower prevalence now than in the past. However, they are seen as beriberi in so
    12·1 answer
  • What is the numerical value of Avogadro's number?
    8·1 answer
  • How many hours a day do famers leave the lights on for hens to lay eggs
    11·2 answers
  • Glucose, C6H12O6, is used as an energy source by the human body. The overall reaction in the body is described by the equation C
    10·1 answer
  • Does anyone know how to do these?
    13·1 answer
  • At what temperature is the following reaction at equilibrium? 2Na, O, + 2H,0 + 4NaOH + O, AH° = -109 kJ, ASO = -133.2 J/K
    7·1 answer
  • Do mutations occur in DNA and RNA?
    6·2 answers
  • Find the element, mass number, atomic number, and number of protons from the following information.
    5·1 answer
  • A neutral cloth and a neutral rod are rubbed together. Electrons are transferred from the rod to the cloth. What will be the fin
    14·1 answer
  • A 30:70 (mole %) ratio of acetone:water is heated to 54.36 ∘C at 760 mmHg. What is the total vapor pressure of the system? The v
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!