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
kirill115 [55]
3 years ago
7

How many electrons does Helium (He) have?

Chemistry
2 answers:
Bad White [126]3 years ago
6 0
Helium has two electrons. This can be found by looking at the atomic number on the periodic table. Neutral atoms have the same number of protons as electrons.
myrzilka [38]3 years ago
5 0

Answer: 2

Explanation:

Hope this helps! (^-^)

You might be interested in
What pressure is exerted on the bottom of a 0.500-m-wide by 0.900-m-long gas tank that can hold 50.0 kg of gasoline by the weigh
Natasha_Volkova [10]

Answer:

1088.89 Pa

Explanation:

According to the Newton's second law of motion:-

Force=Mass\times Acceleration

Mass = 50.0 kg

Acceleration = g = 9.81 m/s²

So,  

Force=50.0\times 9.8\ kgm/s^2

Force = 490 N

Area of the base = length\times breath = 0.500\times 0.900 m² = 0.45 m²

<u>Pressure = Force/Area = \frac{490\ N}{0.45\ m^2} = 1088.89 Pa</u>

8 0
3 years ago
Student have a receipt which calls for 1.15 lb of flour, but, of course, in France you will need to purchase flour in kilograms.
Verizon [17]

0.52164 kg of Flour

<u>Explanation:</u>

We have to convert lb (pounds) kg (kilograms), by using the conversion unit,

1 lb = 0.4536 kg

So to convert 1.15 lb into kg, we have to multiply 1.15 by 0.4536.

1.15 \times 0.4536 = 0.52164 kg of Flour

So the receipt calls for 0.52164 kg of Flour.

5 0
4 years ago
For each trial, compute the mol of titrant; (molarity x L) and keep the number of significant figures to 4.
MrMuchimi

Answer:

Trial     Number of moles

           

  1          0.001249mol

  2         0.001232mol

  3          0.001187 mol

Explanation:

To calculate the <em>number of moles of tritant</em> you need its<em> molarity</em>.

Since the<em> molarity</em> is not reported, I will use 0.1000M (four significant figures), which is used in other similar problems.

<em>Molarity</em> is the concentration of the solution in number of moles of solute per liter of solution.

In this case the solute is <em>NaOH</em>.

The formula is:

          Molarity=\dfrac{\text{Number of moles of solute}}{\text{Volume of solution in liters}}

Solve for the <em>number of moles:</em>

          \text{Number of moles}=Molarity\times Volume\text{ }in\text{ }liters

Then, using the molarity of 0.1000M and the volumes for each trial you can calculate the number of moles of tritant.

Trial    mL           liters          Number of moles

           

1          12.49       0.01249        0.01249liters × 0.1000M = 0.001249mol

2         12.32      0.01232         0.01232liters × 0.1000M = 0.001232mol

3          11.87       0.01187         0.01187liters × 0.1000M = 0.001187 mol

3 0
3 years ago
Read 2 more answers
The discharge of phosphate in detergents to the environment has led to imbalances in the life cycle of freshwater lakes. A chemi
alina1380 [7]
<h3>What is spectrometric method?</h3>
  • A technique called spectrophotometry uses light intensity measurements as a beam of light travels through a sample solution to determine how much a chemical compound absorbs light.
  • Every chemical either absorbs or transmits light across a specific spectrum of wavelengths, according to the fundamental principle.
  • There are two main techniques used among the various forms of spectrophotometry:
  • ultraviolet-visible range spectrophotometry, which examines the reflectance of certain spectra,
  • and absorption spectrophotometry, which examines the absorption of radiation and particular spectra of light.
  • Applications of spectrophotometry are useful for determining how well gases, liquids, and solids transmit, reflect, and absorb light.

Learn more about spectrometric method here:

brainly.com/question/18339003

#SPJ4

3 0
2 years ago
How many formula units are present in 25.0 mol of sodium chloride
bonufazy [111]
The way to work out formula units is to do the amount of moles (in this case 25) times by 6.022 x 10^23. so, the answer is 1.5055 x 10^25 formula units. hope this helps! (by the way ^ represents ‘to the power of’ because i cant get the smaller symbols on here)
7 0
3 years ago
Other questions:
  • Which is denser 10g of shampoo or 10kg of the same shampoo? Please explain! Thanks!
    11·2 answers
  • Carbon and silicon are tetravalent but ge sn pb show di valency. Why
    8·1 answer
  • Noble Gases (18): (Name all noble gases)
    14·1 answer
  • What is the molarity of a solution made with 400 grams of copper II chloride in 3.5 liters of water?
    6·1 answer
  • Construct an explanation using Newton's Laws of Motion to describe the effects of balanced and unbalanced forces on the motion o
    6·2 answers
  • A sonar device on a ship sends ultrasound waves under the water to locate a submarine. It takes
    10·1 answer
  • The process shown was used by Mendel during his experiments. What is the process called?​
    12·1 answer
  • 24 g of magnesium to mol
    13·1 answer
  • If an object is travelling 25.0 meters/second, how far will it travel in 45 minutes?
    13·1 answer
  • How many total atoms are there in one molecule of C145H293O168?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!