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
mixas84 [53]
2 years ago
14

Hi, i need help.. please

Chemistry
1 answer:
11111nata11111 [884]2 years ago
5 0
4 because of the measurements and the figures starts from 0 to 40
You might be interested in
You have 500,000 atoms of a radioactive substance. After 2 half-lives have past, how many atoms remain?
Aleonysh [2.5K]

Answer:

125000

Explanation:

Because it is halved and halved again.

3 0
1 year ago
Read 2 more answers
Which of these is NOT a layer of the skin?
bagirrra123 [75]
I need the options to choose from
4 0
2 years ago
Read 2 more answers
3) How many moles of solute are dissolved in 1.5 L of a 0.80 M solution? * 10 points
Mrrafil [7]

Answer:

1.2

Explanation:

Molarity = moles/volume

to find the moles, you must multiply both sides by volume

so, take 1.5 L * 0.80 M

this equals 1.2 :)

7 0
2 years ago
PLEASE HELP SOMEONE PLEASEEEE
crimeas [40]

Answer:

the answer is b

hope this helps you!!

Have a lovely day!

-millie :D

4 0
2 years ago
Calculate the percent composition of the following:<br><br> A. VO3<br><br> B. V2O5
tino4ka555 [31]

A) Answer is: 51.48% V and 48.52% O.

Ar(V) = 50.94; atomic weight of vanadium.

Ar(O) = 16; atomic weight of oxygen.

Ar(VO₃) = 50.94 + 3 · 16.

Ar(VO₃) = 98.94; molecular weight of vanadium (VI) oxide.

ω(V) = Ar(V) ÷ Ar(VO₃) · 100%.

ω(V) = 51.48%; the percent composition of vanadium.

ω(O) = 100% - 51.48%.

ω(O) = 48.52%; the percent composition of oxygen.

B) Answer is: 67.80% V and 32.20% O.

Ar(V) = 50.94; atomic weight of vanadium.

Ar(O) = 16; atomic weight of oxygen.

Ar(V₂O₅) = 2 · 50.94 + 5 · 16.

Ar(V₂O₅) = 149.88; molecular weight of vanadium (V) oxide.

ω(V) = 2 · Ar(V) ÷ Ar(V₂O₅) · 100%.

ω(V) = 67.80%; the percent composition of vanadium.

ω(O) = 100% - 67.80%.

ω(O) = 32.20%; the percent composition of oxygen.

4 0
3 years ago
Other questions:
  • Which scientist was responsible for discovering the neutron? A. Niels Bohr B. Robert Millikan C. James Chadwick D. Ernest Ruther
    8·2 answers
  • Choose the ground state electron configuration for Cr3+.
    8·1 answer
  • Which of the following is an example of sound waves being reflected?
    15·1 answer
  • Daniel has a sample of pure copper. Its mass is 89.6 grams (g), and its volume is 10 cubic centimeters (cm3). What’s the density
    5·2 answers
  • Describe what bacteria are - their parts, how they can be good, how they can be bad, and the different types.
    14·2 answers
  • 7th grade science !!<br> I have to write a claim, evidence and reasoning
    9·1 answer
  • According to the diagram below, which of the following factors keeps Earth in motion around the sun?
    14·1 answer
  • Unit 7 CER
    10·1 answer
  • How do you determine the thermal energy of an object
    15·1 answer
  • Predict the missing component of predict the missing component of each reaction.
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!