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
ankoles [38]
3 years ago
5

One mole of particles of any substance contains how many particles?

Chemistry
1 answer:
melomori [17]3 years ago
4 0

<u>Answer:</u> The correct answer is Option d.

<u>Explanation:</u>

According to mole concept:

1 mole of a substance contains 6.02\times 10^{23} number of particles.

This number is known as Avogadro's number.

The mass of 1 mole of a substance or Avogadro number of particles has the mass equal to molar mass of that substance.

Hence, the correct answer is Option d.

You might be interested in
Data and evidence are interchangeable in science. True or false?
Elodia [21]
True because if an old theory finds new information that can be changed if it’s different then the original material
6 0
3 years ago
Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happe
iragen [17]
Is this the full question?

<span>Heat that flows by conduction is the transfer of thermal energy between substances in contact. For this to happen, what must occur?

A) The two systems must be the same temperature.
B) The two systems must not be touching each another.
C) One system must have higher kinetic energy than the other system.
D) The thermal energy of one system must be the same as the thermal energy of the other system.</span>
6 0
3 years ago
Read 2 more answers
What is emitted when an electron returns to its lower energy level?
Yakvenalex [24]

Answer:

When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.

Explanation:

4 0
2 years ago
Read 2 more answers
At 35.0°c and 3.00 atm pressure, a gas has a volume of 1.40 l. what pressure does the gas have at 0.00°c and a volume of 0.950 l
Leona [35]

Answer : The pressure of gas will be, 3.918 atm and the combined gas law is used for this problem.

Solution :

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 3 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 1.40 L

V_2 = final volume of gas = 0.950 L

T_1 = initial temperature of gas = 35^oC=273+35=308K

T_2 = final temperature of gas = 0^oC=273+0=273K

Now put all the given values in the above equation, we get the final pressure of gas.

\frac{3atm\times 1.40L}{308K}=\frac{P_2\times 0.950L}{273K}

P_2=3.918atm

Therefore, the pressure of gas will be, 3.918 atm and the combined gas law is used for this problem.

4 0
3 years ago
Read 2 more answers
Be sure to answer all parts.The combustion of a 40.0−g gaseous mixture of H2 and CH4 releases 3766 kJ of heat. Calculate the amo
Svetach [21]

Answer:H2=11.4g

CH4=28.6g

Explanation:The complete combustion of the two gases can be represented by a balanced reaction below

1. CH4 +2O2___CO2+2H2O

2.2H2+O2___2H2O

Combining the two we have CH4 +2H2+3O2___

CO2+4H2O

Since the mixture contains 40gof CH4 and 2, therefore 20g of CH4 and 8g of H2 combines.

Calculated from their molecular Mass i.e CH4 12+4×2)=20 and 2H2= 2×2×2=8g

Mass of CH4=20/28×40=28.6g

2H2=8/28×40=11.4g

7 0
3 years ago
Other questions:
  • Each energy level of an atom has a maximum number of ____ it can hold.
    6·1 answer
  • Which element will be more reactive - Mg (magnesium) OR Se (Selenium)? *
    10·1 answer
  • A coordination complex is made up of _________________________________________. (Choose one) Selected Answer: IncorrectC. a tran
    8·1 answer
  • What is the enthalpy of reaction for the decomposition of calcium carbonate?
    8·1 answer
  • Identify the approximate color you would expect if
    13·2 answers
  • There are three ways in which heat be transferred - conduction, convection, and radiation. Which types of thermal transfer invol
    7·1 answer
  • Which of the following is an element?<br> A. Steel<br> B. Sodium chloride<br> C. Fire <br> D. Carbon
    8·2 answers
  • An electron moves from an excited state back to the ground state releasing
    14·1 answer
  • Which of the following would be expected to have the highest surface tension?
    5·1 answer
  • The atomic mass and abundance of Cr-50 is 49.946 amu and 4.3%. The atomic mass and abundance of Cr-52 is 51.941 amu and 83.8%. T
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!