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
Luda [366]
3 years ago
15

What makes up nearly all of the atom's mass?

Chemistry
2 answers:
VMariaS [17]3 years ago
7 0
Sum of the number of protons and neutrons, which is the nucleus
Ber [7]3 years ago
5 0

Answer:

The Nucleus

Explanation:

The nucleus of an atom contains both the protons (positively charged particles) and the neutrons (particles with no charge) - these two set of particles present in the nucleus of an atom determines the mass of an atom. Hence, atomic mass is the sum of the number of protons and number of neutrons present in the nucleus of an atom.

You might be interested in
Which of these is not a postulate of the kinetic-molecular theory of gases?
marin [14]

a) Gas particles have most of their mass concentrated in the nucleus of the atom.

b) The moving particles undergo perfectly elastic collisions with the walls of the container.

c) The forces of attraction and repulsion between the particles are insignificant.

d) The average kinetic energy of the particles is directly proportional to the absolute temperature.

e) All of the above are postulates of the kinetic molecular theory.

Gas particles have most of their mass concentrated in the nucleus of the atom.

Answer: Option A.

<u>Explanation:</u>

Kinetic Molecular Theory expresses that gas particles are in consistent movement and show flawlessly versatile crashes. Motor Molecular Theory can be utilized to clarify both Charles' and Boyle's Laws. The normal active vitality of an assortment of gas particles is straightforwardly corresponding to total temperature as it were.

The kinetic theory of gases is a significantly critical, however straightforward model of the thermodynamic conduct of gases with which numerous important ideas of thermodynamics were built up.

6 0
3 years ago
Is powdered sports drink ionic or covalent ? 10pts !
Dahasolnce [82]
<h3><u>Answer;</u></h3>

Ionic

Powdered sports drink is<u> ionic </u>

<h3><u>Explanation;</u></h3>
  • <em><u>Sports drinks are beverages whose purpose is to help athletes replace water, electrolytes, and energy before and after training or competition.</u></em>
  • Sport drinks contain may contain water, fuel and electrolytes which are used to regulate fluid balances in the body. Electrolytes are molecules that have electrical charge called ions, such as calcium , potassium, sodium and chloride ions.
  • <em><u>Ionic compounds are made up of ions, that is positively charged ions and negatively charged ions which are joined together by ionic bonds. Electrolyte in sport drinks forms ionic bonds.</u></em>
7 0
2 years ago
Why is it necessary to mix any solution that does not show an immediate change?.
mr_godi [17]

Answer:

Explanation:

It is to keep the mixture homogeneous

5 0
2 years ago
Raising the temperature of 10.0 g of water from 10.0 °C to 20.0 °C requires 100.0 cal of energy, while raising the temperature o
djyliett [7]

Answer:

Explanation:

The change in enthalpy of a substance when heated is given by

ΔH = m x Csp x ΔT

so the enthalpy change is dependent on the specific heat , i.e its capactity to absorb heat, and is not influenced by factors such as being closer to the melting point, volume , potential energy or being a solid or liquid.

6 0
2 years ago
Phosgene is a highly toxic gas made up of carbon, oxygen, and chlorine atoms. Its density at 1.05 atm and 258C is 4.24 g/L. (a)
VikaD [51]

Answer:

Molar mass = 99 g/mol

Explanation:

Phosgene contains carbon, oxygen and chlorine atoms. Its molecular formular is; COCl2

The molar mass is given as the sum off the individual atomic mass of the elements in the compound.

Molar mass = C + O + 2Cl

Molar mass = 12 + 16 + 2(35.5)

Molar mass = 99 g/mol

5 0
2 years ago
Other questions:
  • Celina has a water sample that’s contaminated with salt and microorganisms. Which method should she use to purify the water?
    9·2 answers
  • Zygote fungi spores can survive very harsh conditions
    12·1 answer
  • If a liquid has a density of 0.785, then any object with _____ density will float.
    11·1 answer
  • The Weak Ionization constant (Ka) for HCOOH is equal to:<br><br><br> Please help me lol
    14·2 answers
  • The reaction that you will conduct in this experiment is known as a "haloform" reaction. When a methyl ketone is used as a subst
    7·1 answer
  • How many moles of oxygen are needed to completely react with 9.5 g of sodium
    11·1 answer
  • 1. What is the empirical formula of a compound that contains 0.783g of C, 0.196g of H and 0.521g of O?
    8·1 answer
  • A car traveling with constant speed travels 150 km in 7200 s. What is the speed of the car?
    7·1 answer
  • 4Fe+3O2--&gt;2Fe2O3. How many moles of fe2o3 are produced from 0.5 moles of o2?
    11·1 answer
  • The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!