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
Basile [38]
3 years ago
14

43.0 + 50.0 + 16.0= please answer with right amount of significant figures

Chemistry
1 answer:
zzz [600]3 years ago
8 0

Answer:

109.0

Explanation:

When adding or subtracting values, you must round your answer to the same "place" as the measurement with its last significant figure <em>furthest to the left</em>.  

That is, you round off to the same number of decimal places as the measurement with the <em>fewest decimal places</em>.

43.<u>0 </u>

50.<u>0</u>

<u>+16.0 </u>

109.<u>0</u>

In each measurement, the “0” is the significant figure furthest to the left, so you round off the number to the “tenths" place. That's the last column that the measurements share.

109.0 → 109.0 (rounded to the “tenths” place)

In other words, you do not round off, and the sum has four significant figures.

You might be interested in
B. The equilibrium constant for the reaction 2H2(g) + S2(g) 2H2S(g) is Keq = . (3 points)
eimsori [14]

Answer:

i. Keq=4157.99.

ii. More hydrogen sulfide will be produced.

Explanation:

Hello,

i. In this case, for the concentrations at equilibrium on the given chemical reaction, the equilibrium constant results:

Keq=\frac{[H_2S]^2}{[H_2]^2[S_2]} =\frac{(0.97M)^2}{(0.051M)^2(0.087)} =4157.99

ii. Now, by means of the Le Chatelier's principle, the addition of a reactant shifts the reaction towards products, it means that more hydrogen sulfide will be produced in order to reach equilibrium.

Best regards.

4 0
3 years ago
Which of the following is an example of a chemical change?
wolverine [178]

Answer:

C

Explanation:

6 0
3 years ago
Read 2 more answers
What two aspects of a force do scientists measure?
soldier1979 [14.2K]

Yo sup??

Force is a vector quantity therefore it has both direction and magnitude.

Hence scientists measure magnitude and direction of a force.

Correct answer is option A

Hope this helps

5 0
3 years ago
A solution
timurjin [86]
The answer to your question is  C.  A solution is a homogeneous mixture composed of two or more substances, so it couldn't have been A and D. Since a solution can't have its substances separated by a chemical means because they are chemically bonded, thus they are able to be separated by physical means 
3 0
3 years ago
A sample of chlorine gas is at 300K and 1.00 atm. At what temperature and pressure would it behave more like an ideal gas?
Fofino [41]

In lower temperatures, the molecules of real gases tend to slow down enough that the attractive forces between the individual molecules are no longer negligible. In high pressures, the molecules are forced closer together- as opposed to the further distances between molecules at lower pressures. This closer the distance between the gas molecules, the more likely that attractive forces will develop between the molecules. As such, the ideal gas behavior occurs best in high temperatures and low pressures. (Answer to your question: C)  This is because  the attraction between molecules are assumed to be negligible in ideal gases, no interactions and transfer of energy between the molecules occur, and as temperature decreases and pressure increases, the more the gas will act like an real gas.

3 0
3 years ago
Other questions:
  • I need help !!!!!!!!!!! Plz
    9·1 answer
  • what is the group number for elements that have a stable number of electrons in their outer energy level
    6·1 answer
  • Match the effects on the concentration of SO3 gas when the following changes occur after initial equilibrium has been establishe
    7·2 answers
  • When light bends as it passes from one transparent object to another, the light is
    8·2 answers
  • Some plant seeds are adapted to develop only at extremely high temperatures. For what environmental change are
    9·2 answers
  • Name the following alkanes:<br> CH, - CH, -CH, - CH,<br> 1
    10·1 answer
  • After he finished his work, Mendeleev predicted _____.
    10·1 answer
  • What is the name for the compound formed between nitrogen and magnesium. (show your work)
    5·1 answer
  • If I made any mistakes in this please tell me now
    7·1 answer
  • Select the correct answer.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!