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
hram777 [196]
3 years ago
6

If 34.7 g of O2 reacts with iron to form 79.34 g of iron oxide, how much iron was used in the reaction?

Physics
1 answer:
zhuklara [117]3 years ago
6 0

Answer: B. 44.64 g

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.

Mass of reactants = mass of iron + mass of oxygen = mass of iron + 34.7 g

Mass of product = mass of iron oxide = 79.34 g

As Mass of reactants = Mass of product

mass of iron + 34.7 g = 79.34 g

mass of iron = 44.64 g

Thus 44.64 g of iron was used in the reaction

You might be interested in
PLEASE HELP
siniylev [52]
A person standing on the moon watching the earth rotate
3 0
3 years ago
Read 2 more answers
PHYSICS can somebody please answer this
tankabanditka [31]
Yes the answer is recoiled of the Gaian and the hash of attorney then the distance must be bábale of the original number
8 0
3 years ago
Which of the following are true? Select all that apply. The net electric field at any location inside a block of copper is zero
Agata [3.3K]

Answer:

1) The net electric field at any location inside a block of copper is zero if the copper block is in equilibrium.

2) In equilibrium, there is no net flow of mobile charged particles inside a conductor.

3) If the net electric field at a particular location inside a piece of metal is not zero, the metal is not in equilibrium.

Explanation:

1) and 3) A block of copper is a conductor. The charged particles on a conductor in equilibrium are at rest, so the intensity of the electric field at all interior points of the conductor is zero, otherwise, the charges would move resulting in an electric current.

2) The charged particles on a conductor in equilibrium are at rest.

6 0
3 years ago
Ultraviolet rays are used to _____.
NeTakaya

Answer:

Grow plants where little light is available

Explanation:

The plants need the ultraviolet rays in order to be able to survive and develop. The need mainly comes from the dependence of these rays for production of food, in a process known as photosynthesis. The plants are producers, thus they create their own food. In order to be able to do that they are using the ultraviolet rays, as well as water, and carbon dioxide. By combining them, the plants manage to create glucose for them, and that is their food source. The plants that are kept at places where there's not enough light are often exposed to ultraviolet rays so that they are able to perform the process of photosynthesis and grow properly.

8 0
3 years ago
Read 2 more answers
What is the string theory.
Leno4ka [110]
String the·o·ry
noun
a cosmological theory based on the existence of cosmic strings.
7 0
3 years ago
Read 2 more answers
Other questions:
  • The main reason for making the cover of a vacuum
    15·1 answer
  • A box slides down a frictionless plane inclined at an angle θ ¸ above the horizontal. The gravitational force on the box is dire
    11·1 answer
  • A jogger runs at an average speed of 5 m/s for 3 minutes, then finishes with an average speed of 4 m/s for 2 minutes. What is hi
    6·1 answer
  • If a 3.1 kg ring of granite decreases in temperature 17.9C. What is the
    14·1 answer
  • Find the gravitational potential energy of a light that has a mass of 13.0 kg and is 4.8 m above the ground
    12·1 answer
  • A spherical shell of mass M and radius R is completely filled with a frictionless fluid, also of mass M. It is released from res
    8·1 answer
  • An object is moved 29 meters with a force of 289 N. what is the work done
    12·1 answer
  • Explain why your PE and KE are usually not both high at the same time (If PE is high then usually KE is low)
    14·2 answers
  • um can someone please help me I'm really stuck on this question and an explanation would be nice thank you
    9·1 answer
  • Please help me guys <br>a.<br>b.<br>c.​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!