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
enyata [817]
3 years ago
7

Aluminum is a highly reactive metal that oxidizes when exposed to air. Which of these would be a good first step in balancing th

is reaction? Al + O2 → Al2O3 A) Put a coefficient of 3 on Al B) Put a coefficient of 3 on O2 C) Put a coefficient of 2 on O2 D) Put a coefficient of 3 on Al2O3
Physics
2 answers:
Mila [183]3 years ago
8 0
The answer is B. because when u add 3 on O2 and multiplied together makes 6

Helga [31]3 years ago
8 0

Answer: B) Put a coefficient of 3 on O_2

Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balancing starts with the maximum number of atoms and thus first oxygen needs to get balanced by putting a coefficient of 3 on reactant side.

The balanced chemical equation will be:

4Al+3O_2\rightarrow 2Al_2O_3

You might be interested in
A scientist shines light from a source onto a piece of metal, and no electrons are released by the metal. Increasing the intensi
Nezavi [6.7K]

This is the photoelectric effect, and it is best explained by the particle model of light.

<h3>What is the photoelectric effect?</h3>

The photoelectric effect refers to the emission of negatively charged particles and electromagnetic radiation that hits an object.

The photoelectric effect shows how electrons can be released from a given object when this material is absorbing electromagnetic radiation.

The photoelectric effect is a fundamental piece of evidence for understanding the nature of light particles.

Learn more about the photoelectric effect here:

brainly.com/question/1359033

7 0
2 years ago
When did agriculture first began?​
timofeeve [1]

Answer:

  • Humans invented agriculture between 7,000 and 10,000 years ago, during the Neolithic era, or the New Stone Age. There were eight Neolithic crops: emmer wheat, einkorn wheat, peas, lentils, bitter vetch, hulled barley, chickpeas, and flax.

5 0
2 years ago
Read 2 more answers
What is a element that tends to be shiny, easy shaped, and a good conductor of heat?
ozzi
The answer to your question is Metal
8 0
2 years ago
Yes or no
Tju [1.3M]

Answer:

1. No, it is a colloid

2. Yes

Explanation:

8 0
2 years ago
Describe at least four of the requirements (facts) that any model of solar system formation must include (according to the nebul
kvasek [131]
The nebular theory describes the formation of the solar system and states that the system began as a gigantic cloud of gas and dust called a nebula which eventually condensed to form the sun, planets and other objects in the solar system. The first fact speaks to the formation of the planets, where gravity pulled larger clumps of material closer to form solid rocky planets closer to the sun and gas giants further out. The second requirement is that a nearby explosion or super nova would have to disturb our nebula to trigger rotation and the eventual formation of the sun. The third requirement/fact is that the planets go around the sun in the same direction. the last fact is that the planets go around the sun within 6 degrees of a common plane. This indicates that the solar system formed from a spinning disk of materials.
4 0
3 years ago
Other questions:
  • Investigators are researching the appearance of a strange movement of objects in what the local community considers a haunted ho
    11·1 answer
  • A laser with a power of 1.0 mW has a beam radius of 1.0 mm. What is the peak value of the electric field in that beam
    11·1 answer
  • In an object's net charge positive or negative if it loses electrons?
    10·1 answer
  • A person with a weight of 956 N runs up a 2.41 m staircase. If it takes 4.17 seconds to reach the top, how much power was genera
    7·1 answer
  • a rocket is launched with a constant acceleration straight up. exactly 4.00 seconds after lift off, a bolt falls off the side of
    6·1 answer
  • Question 11 (2 points)
    8·1 answer
  • What is nuclear fission reaction?
    8·1 answer
  • If i click on a mouse does that show energy transfer?
    14·2 answers
  • What is the centripetal force
    5·1 answer
  • A voltage is applied to a resistor,
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!