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
hodyreva [135]
4 years ago
6

The total number of each element is not changed during a chemical reaction

Chemistry
1 answer:
Paha777 [63]4 years ago
3 0

false all element when they are combined eachother thier valance number will change

the combination of oxygen and aluminum gives us Al2O3 see even the numbers are changing thank you if you have a comment you can write

You might be interested in
PLs help mweee Ill mark brainliest
nydimaria [60]

Answer:

I'm pretty sure that it's plate movement...

7 0
3 years ago
After swimming in the ocean for several hours, the swimmers noticed that their fingers appeared to be very wrinkled or shriveled
MatroZZZ [7]
<span>The answer is hypertonic. In osmosis, water molecules move from a hypotonic solution to the hypertonic solution, through a semipermeable membrane. This occurs until both solutions become isotonic relative to each other.  In osmosis, only the movement of water molecules occurs since the ions are large enough to pass through the pores of the semipermeable membrane, in this case, the cell membrane. Due to loss of water in the process of osmosis, the cells in the fingers of the swimmers shrunk hence looked shriveled.</span>




5 0
3 years ago
Sabendo que os calores de combustão do enxofre monoclínico e do enxofre rômbico são, respectivamente, - 297,2 kJ/mol e - 296,8 k
liq [111]

Responda:

+ 0,9kJ / mol

Explicação:

Dados os calores de combustão do enxofre monoclínico e enxofre rômbico como - 297,2 kJ / mol e - 296,8 kJ / mol, respectivamente para a variação na transformação de 1 mol de enxofre rômbico em enxofre monoclínico conforme mostrado pela equação;

S (mon.) + O2 (g) -> SO2 (g)

Uma vez que são todos 1 mol cada, a mudança na entalpia será expressa como ∆H = ∆H2-∆H1

Dado ∆H2 = -296,8kJ / mol

∆H1 = -297,2kJ / mol

∆H = -296,8 - (- 297,2)

∆H = -296,8 + 297,2

∆H = 297,2-296,8

∆H = + 0,9kJ / mol

Portanto, a mudança na entalpia da equação é + 0,9kJ / mol

4 0
3 years ago
How would you combine reactions A–C, shown below, to obtain the overall reaction: $$ Please select all that apply.
snow_lady [41]

Answer:

By eating a sandwich

Explanation:

your welcome nigel

4 0
3 years ago
What is the maximum mass of aluminum chloride that can be formed when reacting 18.0 g of aluminum with 23.0 g of chlorine?
Agata [3.3K]

<span>Number of moles of aluminum chloride = 0.216. </span>
<span>Mass of compound = Number of moles x Molar Mass </span>
<span>= 0.216mol x [ 37 + 3(35.5) ]g/mol </span>
<span>= 30.996 </span>
<span>= 31.0g (3 s.f.)</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • According to collision theory, which condition(s must be met in order for molecules to react?
    6·1 answer
  • 35000 kJ/ 0.250 s <br><br> kJ is kilojoules
    15·1 answer
  • The right answer for this problem
    12·1 answer
  • Which experiment lead to the discovery that the tiny, dense nucleus contained most of
    14·1 answer
  • What is true of boric acid?<br> PLEASE HELP
    15·1 answer
  • Pt.3 of my questions because a bot answer it and no one could answer it
    7·1 answer
  • 4 Hydrogen has three naturally occurring isotopes. H.1, H-2, and H-3 The atomie mass of Hydrogen is 1.097 Which isotope is most
    6·1 answer
  • Evaluate the carbon dioxide molecule. Explain how to determine if double or triple bonds exist in the molecule. Use details to s
    11·2 answers
  • What has to be true in order for a single replacement reaction to happen?
    15·1 answer
  • Light shining on solar cells produces a current that charges a solar calculator. Which model of light does this example support?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!