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
vovangra [49]
1 year ago
9

How i the ma number of an atom calculated? (1 point)

Chemistry
1 answer:
Bess [88]1 year ago
4 0
Proton plus neutron is the correct answer. Protons and neutrons have a mass of 1 and electrons have a mass of 0. So in order to find the mass of an atom you need to add the number of protons and the number of neutrons.
You might be interested in
g in the combustion of 0.398 mol c4h8, how many moles of o2 would be required to completely react with the fuel?
storchak [24]

41.4 grams of oxygen is essentially required for complete combustion of 3 moles of butane gas.

<h3>What is combustion?</h3>
  • Combustion is a chemical reaction that often involves the presence of oxygen and produces heat and light in the form of flames.
  • Because of the nature of the chemical reaction and the fact that more energy is produced than can be released into the surrounding medium, the rate or speed at which the reactants combine is high.
  • As a result, the temperature of the reactants is increased, accelerating the process even further.

As you know, combustion reaction is a chemical reaction in which a substance reacts with the atmospheric oxygen (O₂) to produce carbon dioxide and water. Therefore, balanced combustion reaction of butane (C₄H₁₀) will be as follows:

C₄H₁₀+\frac{13}{2}O₂→4CO₂+5H₂O

You can observe in the above reaction that, \frac{13}{2} moles of oxygen are required for combustion of 1 mole of butane.

Therefore, going by unitary method, for complete combustion of 3 moles of butane, (\frac{13}{2}×0.398) moles of oxygen would be required.

Now, we know, number of moles = \frac{Given mass}{Molar mass}

Molar mass of oxygen is 16 g/mol

We need to find a given mass which is the mass of oxygen required when the number of moles is equal to 2.59.

Thus, given mass of oxygen or mass of oxygen required = number of moles of oxygen × molar mass of oxygen

Mass of oxygen required = 2.59 moles × 16 g/mol = 41.4 g.

Hence, 41.4 grams of oxygen is essentially required for complete combustion of 3 moles of butane gas.

To learn more about combustion, refer to

brainly.com/question/13251946

#SPJ4

8 0
1 year ago
⚠️⚠️PLEASE HELPP⚠️⚠️
yuradex [85]

Answer:

Humans

Explanation:

Humans have energy of motion and store energy.

3 0
3 years ago
Read 2 more answers
What is a sun spot? in the sun on the surface
umka21 [38]
Sunspots Are decreased temperature areas. So it might be bright all around the sun spots, and the dark spots are where the temperature is lower. They usually form in polar pairs, meaning that on the other side in the same spot there would be another sunspot
5 0
3 years ago
Take the following out of scientific notation 3.74 x 10^7<br> Please help me
erastovalidia [21]

Answer:

37400000000 is the <em>ans</em>

5 0
3 years ago
In a series circuit there are 17 light bulbs, each providing 1 ohm of resistance. What is the total resistance?
Sauron [17]

Answer:

17 ohms

Explanation:

Given that,

In a series circuit there are 17 light bulbs, each providing 1 ohm of resistance.

We need to find the total resistance of the circuit.

The equivalent resistance for series combination is given by :

R_{eq}=R_1+R_2+....

For 17 light bulbs, the equivalent resistance is given by :

R_{eq}=R+R+....\text{upto 17 terms}\\\\R_{eq}=17R\\\\=17

Hence, the total resistance is 17 ohms. Hence, the correct option is (d).

7 0
3 years ago
Other questions:
  • Through which of the following ways does the sun primarily transfer it’s he injury to the earth
    9·1 answer
  • PLEASE HELP!! STOICHIOMETRY!
    9·1 answer
  • What is a supersaturated solution?
    11·1 answer
  • How much gold is harvested per ton of earth from the underground mine?
    9·1 answer
  • 10. Which statement is the most important reason that some people feel that solar energy power can be a pollution-free energy so
    14·1 answer
  • A 1.0 kg ball is thrown into the air and initial velocity of 30 mi./s how high into the air did the ball travel
    8·1 answer
  • What type of molecule is 3-hexyne?
    13·1 answer
  • What is the % of each element in (NH4)2(SO4)?
    9·1 answer
  • Balance the equation: 2Mg + O2 = 2(MgO) (Help!)
    15·1 answer
  • The accepted value for the density of a certain material is 3.427 g/ml. Ally 10 points
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!