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
MrRa [10]
3 years ago
13

Is this true or false?

Chemistry
1 answer:
IceJOKER [234]3 years ago
7 0

Answer:

true

Explanation:

You might be interested in
What part of an atom determines if it will combine or break apart from other substances?
Anni [7]

Electron is the correct answer :D

8 0
3 years ago
Fe(s) + CuSO4(aq) <===> Cu(s) + FeSO4(aq)
Ludmilka [50]

Answer : The original concentration of copper (II) sulfate in the sample is, 5.6\times 10^{-1}g/L

Explanation :

Molar mass of Cu = 63.5 g/mol

First we have to calculate the number of moles of Cu.

Number of moles of Cu = \frac{\text{Mass of Cu}}{\text{Molar mass of Cu}}=\frac{89\times 10^{-3}g}{63.5g/mol}=1.40\times 10^{-3}mole

Now we have to calculate the number of moles of CuSO_4

Number of moles of Cu = Number of moles of CuSO_4

Number of moles of CuSO_4 = 1.40\times 10^{-3}mole

Now we have to calculate the molarity of CuSO_4

\text{Molarity}=\frac{\text{Moles of }CuSO_4\times 1000}{\text{Volume of solution (in mL)}}

Now put all the given values in this formula, we get:

\text{Molarity}=\frac{1.40\times 10^{-3}mole\times 1000}{400.mL}=0.0035M

To change mol/L into g/L, we need to multiply it with molar mass of CuSO_4

Molar mass of CuSO_4= 159.609 g/mL

Concentration in g/L = 0.0035M\times 159.609g/mol=0.5586g/L\approx 5.6\times 10^{-1}g/L

Thus, the original concentration of copper (II) sulfate in the sample is, 5.6\times 10^{-1}g/L

3 0
3 years ago
Which of the following atoms would have the longest de Broglie wavelength, if all have the same velocity?
GenaCL600 [577]

Answer:

Li

Explanation:

The phenomenon of wave particle duality was well established by Louis deBroglie. The wavelength associated with matter waves was related to its mass and velocity as shown below;

λ= h/mv

Where;

λ= wavelength of matter waves

m= mass of the particle

v= velocity of the particle

This implies that if the velocities of all particles are the same, the wavelength of matter waves will now depend on the mass of the particle. Hence; the wavelength of a matter wave associated with a particle is inversely proportional to the magnitude of the particle's linear momentum. The longest wavelength will then be obtained from the smallest mass of matter. Hence lithium which has the smallest mass will exhibit the longest DeBroglie wavelength

4 0
3 years ago
Please help me, Thank you!
Phantasy [73]

Answer:

2

Explanation:

The atom shown in the image has 2 core electrons.

Electrons are the negatively charged particles within an atom. Therefore the total number of electrons surrounding the nucleus in the given specie is 7.

 So;

   We have 2 core electrons

   And 5 valence electrons

The core electrons are the inner orbital electrons.

The valence electrons are the outermost electrons.

3 0
3 years ago
Oxygen atomic mass number ??
Anuta_ua [19.1K]
The answer is 8. Hope this helps.
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following best explains why air is considered a natural resource?
    13·1 answer
  • Write the complete balanced equation for the following reaction:
    5·1 answer
  • Suppose 870.mmol of electrons must be transported from one side of an electrochemical cell to another in 84. seconds. Calculate
    11·1 answer
  • Which molecule is polar?A;CO2 B:PF3 C:CH4 D:BF3
    10·1 answer
  • Which statement describes a chemical property of hydrogen gas
    10·1 answer
  • What is a hypothesis
    8·2 answers
  • Rewrite this measurement with a simpler unit, if possible.<br> 4.5·m2m2m
    5·1 answer
  • According to your investigation in part A, how do strong acids differ from weak acids? Select all the correct answers. Strong ac
    15·2 answers
  • Which of the following hydrocarbons will be the most acidic?
    10·1 answer
  • Help i know whofkfkfkf
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!