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
bekas [8.4K]
3 years ago
15

1. Marque a alternativa que melhor explica o que aconteceu com o átomo ao longo da história.

Chemistry
2 answers:
sergey [27]3 years ago
4 0

Answer: The answer is B.

Vera_Pavlovna [14]3 years ago
3 0
The correct answer is B
You might be interested in
Why is Nertic zone particularly rich in living things?
Leya [2.2K]

Answer:

It is rich in organisms because sunlight passes through its shallow water enabling photosynthesis to occur.

Explanation:

I hope that helped!!

8 0
3 years ago
Name the particle discovered by James<br> Chadwick in 1932.
LenKa [72]

Answer:

He discovered neutrons in 1932

4 0
3 years ago
Am I incorrect ?<br> Or nah?
Mademuasel [1]
I think so... I'm currently learning this too but you should be correct
4 0
3 years ago
Read 2 more answers
Use the law of conservation of mass to answer the questions. Consider a hypothetical reaction in which A and B are reactants and
shutvik [7]

Answer:

26 grams of D will be produced.

Explanation:

The reaction is given by:

A + B ----->  C + D

Mass of A reacted = 21 g

Mass of B reacted = 22 g

Mass of C formed = 17 g

Mass of D formed = m =?

According to law of conservation of mass, the total mass of the reactants used is equal to the total mass of the product formed.

Then:

mass of A reacted + mass of B reacted = mass of C formed + mass of D formed

21 + 22 = 17 + m

m = 26 g

5 0
4 years ago
If you have 12.5g of fluoride and 16.2g of sodium, which is the limiting reactant and how sodium fluoride in grams is your theor
Korvikt [17]

Answer:

F2 is the limiting reactant

27.6 grams of NaF is produced.

Explanation:

Balance the equation first.

2Na+ F2 ---> 2NaF

To find the limiting reactant, solve for how much NaF can be produced with Na and F2

12.5g F2 x (1 mole F2/ 38.00 grams F2)x (2 mole NaF/ 1 mole F2)

=0.658 moles NaF

16.2g Na x (1 mole Na/ 22.99 grams Na)x (2 mole NaF/ 2 mole Na)

=0.705 moles NaF

Since F2 produced the least NaF, F2 is the limiting reactant.

Now, to find how much NaF there is, use the moles solved above with F2 as the limiting reactant.

0.658 moles NaF x (41.99 grams NaF/ 1 mole NaF)= 27.6 moles NaF

27.6 moles of NaF would be theoretically produced.

8 0
3 years ago
Other questions:
  • Please help me :(
    8·1 answer
  • What do oxidation reactions produce during the electrolysis of water?
    7·2 answers
  • Which equation was used by Albert Einstein to explain the photoelectric effect? [E = energy, h = Planck’s constant, and v = freq
    9·1 answer
  • A drink is made up mostly of water. A small amount of sweet powder is stirred in using a spoon. The power in this solution is th
    10·2 answers
  • What is the pH of a solution that has a pOH of 5.4?
    8·1 answer
  • Which of the following has highest first ionization potential among Ne,Mg,Cl and Na​
    8·1 answer
  • A system of knowledge based on facts and principles
    6·1 answer
  • B. What three products are necessary in order for a hydrocarbon combustion reaction to take place?
    13·1 answer
  • Help please its due in 2 minuntes.
    11·2 answers
  • The part in the middle with a coil of wire wrapped around a metal shaft is part of an electric motor. What is it?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!