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
gogolik [260]
3 years ago
12

Define mass number

Chemistry
1 answer:
Ganezh [65]3 years ago
8 0

Answer:

protons plus neutrons

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons.

The sum of neutrons and protons is the mass number of an atom.

Mass number = number of protons + number of neutrons

while the number of protons or number of electrons is the atomic number of an atom.

You might be interested in
Periodic table <br> fill in the box :)
Natalija [7]

Answer:

I took a screen shot of your image, and wrote on top of it!

Explanation:

Hope this helps! :)

6 0
2 years ago
Consider this reaction:
ryzh [129]

Answer:

I think it's 6 moles are produced

3 0
2 years ago
Plzzz help me! I will do anything ;) <br><br> How many molecules are there in 45g of caffeine
babymother [125]

Answer:

45 IS THE ANSWER

Explanation:

MARK AS BRAINLIEST PLSSS

6 0
2 years ago
What mass of gallium oxide, Ga₂O3, can be prepared from
Degger [83]

Answer:

(70 x 2 + 16 x 3) x 29/70 x 2 = 38,9428571 g.

Explanation:

7 0
2 years ago
When iron(III) oxide (Fe2O3) is exposed to carbon monoxide (CO) under high pressure, metallic iron (Fe) and carbon dioxide (CO2)
DedPeter [7]

Answer:

The equation is Fe₂O₃ + CO ⇒ Fe + CO₂.

The balanced reaction equation is Fe₂O₃ + 3CO ⇒ 2Fe + 3CO₂.

Explanation:

First, we have to write our equation. It's actually pretty straightforward - first we look for our reactants (looks like it's Fe₂O₃ and CO), then we look for our products (Fe and CO₂). Then, we have to balance it so that both sides have the same number of both element.

Currently, we have the equation Fe₂O₃ + CO ⇒ Fe + CO₂. There are 2 Fe atoms, 4 O atoms, and 1 C atom on the left side. There is 1 Fe atom, 2 O atoms, and 1 C atom on the right side.

First thing we can do is give our Fe on the right side a coefficient of 2. This will make it equivalent to the 2 Fe atoms on the left side:

Fe₂O₃ + CO ⇒ 2Fe + CO₂

Next, we need to make sure that we have the same number of C and O atoms on each side. This takes a little bit of thinking, but what we have to do is give CO a coefficient of 3 and CO₂ a coefficient of 3. This gives us 6 O atoms on the left side (when we include the O₃) and 6 O atoms on the right side (since there are 3 O₂ atoms and 3 times 2 is 6). Here's what that looks like:

Fe₂O₃ + 3CO ⇒ 2Fe + 3CO₂

And that's how I balanced the equation. It can be confusing, but with enough practice, it will get easier and easier. :)

8 0
2 years ago
Other questions:
  • If my boyfriend asked me out on October 19 when will my one month be ?
    9·2 answers
  • In the example in the lesson, 0.10 mole of sodium chloride or magnesium chloride or aluminum chloride was added to one liter of
    12·1 answer
  • What are 3 ways living creatures use carbohydrates
    13·1 answer
  • Nitrogen dioxide gas is produced by the reaction of nitrogen monoxide gas and oxygen gas .
    10·1 answer
  • Why is helium in group 18 on the periodic table though it only has 2 valence electrons?
    13·1 answer
  • What phase(s) would you expect to observe when the substance is at a temperature of 275 kelvin?
    8·1 answer
  • A sample of Br2(g) takes 12.0 min to effuse through a membrane. How long would it take the same number of moles of Ar(g) to effu
    8·1 answer
  • What is the relationship between the word pairs in this analogy? dull: boring as amusing: entertaining O A. Synonyms O B. Antony
    13·2 answers
  • What form of energy causes an ice cube to melt
    11·1 answer
  • What does Fe(NO3)2 + Cu stands for?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!