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
Marat540 [252]
3 years ago
15

Which determine the charge of an atom?

Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Answer:

the answer is B its the number of protons and neutrons

You might be interested in
Which property of a liquid increases with increasing temperature?
Nina [5.8K]
When temperature of liquid is increased, liquid gets thinner and thinner and hence it's viscosity decreases.

Density = mass/volume.

As we increase the temperature, volume of the liquid starts to increase but mass of the liquid remains constant. As a result, density of liquid decreases.

Hope this helps!
5 0
2 years ago
How much time would it take for 336 mg of copper to be plated at a current of 5.6 A ? Express your answer using two significant
schepotkina [342]

Answer:

1.8 × 10² s

Explanation:

Let's consider the reduction that occurs upon the electroplating of copper.

Cu²⁺(aq) + 2 e⁻ ⇒ Cu(s)

We will establish the following relationships:

  • 1 g = 1,000 mg
  • The molar mass of Cu is 63.55 g/mol
  • When 1 mole of Cu is deposited, 2 moles of electrons circulate.
  • The charge of 1 mole of electrons is 96,486 C (Faraday's constant).
  • 1 A = 1 C/s

The time  that it would take for 336 mg of copper to be plated at a current of 5.6 A is:

336mgCu \times \frac{1gCu}{1,000mgCu} \times \frac{1molCu}{63.55gCu} \times \frac{2mole^{-} }{1molCu} \times \frac{94,486C}{1mole^{-}} \times \frac{1s}{5.6C} = 1.8 \times 10^{2} s

3 0
3 years ago
The average atomic weight of copper, which has two naturally occurring isotopes, is 63.5. One of the isotopes has an atomic weig
Darya [45]

<u>Answer:</u> The atomic weight of the second isotope is 64.81 amu.

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of atomic masses of each isotope each multiplied by their natural fractional abundance

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i     .....(1)

We are given:

Let the mass of isotope 2 be 'x'

Mass of isotope 1 = 62.9 amu

Percentage abundance of isotope 1 = 69.1 %

Fractional abundance of isotope 1 = 0.691

Mass of isotope 2 = 'x'

Percentage abundance of isotope 2 = 30.9%

Fractional abundance of isotope 2 = 0.309

Average atomic mass of copper = 63.5 amu

Putting values in equation 1, we get:

\text{Average atomic mass of copper}=[(62.9\times 0.691)+(x\times 0.309)]

x=64.81amu

Hence, the atomic weight of second isotope will be 64.81 amu.

4 0
2 years ago
Part of a chemical equation is shown below 2koh + h2so4 .
GREYUIT [131]

Answer: K2SO4 + 2H2O

Explanation:

I got it right

4 0
2 years ago
Read 2 more answers
Water is initially present in a state where it’s molecules are far apart. During a change of state ,it’s molecules slow down. Wh
dalvyx [7]

Answer:

Gas ⟶ liquid (condensation)  

Explanation:

If the molecules are far apart, they are in the gas phase.

As the temperature drops, the molecules lose kinetic energy.

They can no longer escape the attractive forces between them and their neighbours, so they stick together and form a liquid.

The most likely change of state is gas ⟶ liquid (condensation).

8 0
3 years ago
Other questions:
  • What kind of cells are produced at the end of meiosis?
    15·1 answer
  • How many mL of a 0.250M sodium hydroxide solution is needed to neutralize 25.0 mL of a 0.430M sulfuric acid solution?
    14·1 answer
  • Please Help Me!!!
    13·1 answer
  • Select the correct answer.
    14·1 answer
  • Como se escribe K2O ennomemclatura estequimetrica y stock​
    15·1 answer
  • Please help due today
    10·1 answer
  • Convert 678.92 cm into meters​
    7·1 answer
  • Based on the information in the tables, what is the Enthalpy of the solution for each substance? Please help me with this proble
    13·1 answer
  • HELPP ASAP I’ll mark you as brainlister 100 points :((((
    13·1 answer
  • Which of these is not true about weight
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!