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
iVinArrow [24]
2 years ago
11

Can someone please answer this?

Chemistry
2 answers:
Blizzard [7]2 years ago
7 0

Answer:

Either A or B

Explanation: Because I learned it on Edge. :)

Lelechka [254]2 years ago
6 0

Answer:

B) go look on the periodic table for the atomic number

Explanation:

The atomic number is how many protons is in an atom

You might be interested in
Do cells divide twice in asexual reproduction, sexual reproduction, or both?
igor_vitrenko [27]
Cells divide in asexual reproduction!


I hope this helps 



please mark me as brainliestt!!
8 0
3 years ago
What is the solution to the problem expressed to the correct number of significant figures? 2.13 + 1 = ?
Paha777 [63]

So,

With addition, we the last digit we keep will be the one which is known for both individual values.

We know 2.13 to the hundredths, but we only know 1 to the ones.  Therefore, we will round off in the ones place.

2.13 + 1 = 3.13 (unrounded)

= 3 (rounded)

Hope this helps!

7 0
3 years ago
Values for the molar mass of nitrogen, oxygen, and nitrogen dioxide
CaHeK987 [17]

Answer:

n=N/Na

n =  \frac{8.23 \times {10}^{22} }{6.02  \times {10}^{23} }  = 0.1367 \: mol

answer: 0.14 mol

Explanation:

5 0
3 years ago
How many excess electrons must be added to an isolated spherical conductor 41.0 cmcm in diameter to produce an electric field of
alina1380 [7]

Answer:

3.65 x 10¹⁰ electrons

Explanation:

we'll apply the following equation for electric field of a point charge on a spherical conductor

E = k \frac{q}{r^{2} }

where E is the electric field

k is a constant of the value 8.99 x 10⁹ Nm²/C²

r is the radius of the spherical conductor

q is the total charge in the sphere

Given diameter d =41.0cm, radius r = 20.5cm = 0.205m (convert cm to m)

Electrical field E = 1250 N/C

we are asked to determine how many excess electrons must be added to the surface of the sphere to produce this electric field

E = k \frac{q}{r^{2} }

q = <u>E x r²</u>

        k

q =  <u>1250 N/C x 0.205m</u>²

       8.99 x 10⁹ Nm²/C²

q =   5.84 x 10⁻⁹ C

this is the total charge in the sphere

To determine the number of electrons, we can divide the charge q by the charge on an electron e (1.6 x 10⁻¹⁹C)

n = \frac{q}{e}

n = <u>5.84 x 10⁻⁹ C </u>

       1.6 x 10⁻¹⁹C

n = 3.65 x 10¹⁰ electrons

Therefore, to apply an electric field of magnitude 1250 N/C, the isolated spherical conductor must contain 3.65 x 10¹⁰ electrons

3 0
3 years ago
How to differentiate between so3 and so4?​
makvit [3.9K]

Answer:

The difference between sulfate and sulfite is, Sulfate (SO4) has 1 atom of Sulphur and 4 atoms of Oxygen. sulfite (SO3) has 1 atom of sulfur and 3 atoms of Oxygen.

Explanation:

7 0
2 years ago
Other questions:
  • If the radius of copper is 0.128 nm, what is the pd of the (100) plane for copper in m-2?
    5·1 answer
  • How many electrons does hydrogen need to satisfy the octet rule?
    5·1 answer
  • What do you use to measure mass
    13·1 answer
  • What volume would 3.01•1023 molecules of oxygen gas occupy at STP?
    6·1 answer
  • All substances are made from some 100 different types of atoms which combine with each other in various ways true or false
    10·1 answer
  • Use the drop-down menus to complete the statements
    5·1 answer
  • Anthracite coal d) is the most abundant grade of coal e) is very soft and burns at high temperatures a) causes the most air poll
    6·1 answer
  • Carbonic acid weathering limestone <br><br> a<br> Chemical Change<br> b<br> Physical Change
    7·1 answer
  • PLEASE I NEED HELP ASAP!!!!
    8·1 answer
  • Which of the following best describes scientists?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!