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
____ [38]
3 years ago
14

How many significant figures are in the number 20300?​

Chemistry
1 answer:
arlik [135]3 years ago
3 0

Answer:

There are three significant figures in the number 20300

You might be interested in
The graph above represents an object moving with a __________________. A) constant velocity B) constant acceleration C) constant
Ann [662]

Answer: I think its C or B

Explanation: Hope this was helpful....

4 0
2 years ago
Consider an exceptionally weak acid, HA, with a Ka = 1x10 -20 . You make a 0.1M solution of the salt Na
Vedmedyk [2.9K]

Answer:

pH=13

Explanation:

Hello,

In this case, given the acid, we can suppose a simple dissociation as:

HA\rightleftharpoons H^+ + A^-

Which occurs in aqueous phase, therefore, the law of mass action is written by:

Ka=\frac{[H^+][A^-]}{[HA]}

That in terms of the change x due to the reaction's extent we can write:

1x10^{-20}=\frac{x*x}{0.1M-x}

But we prefer to compute the Kb due to its exceptional weakness:

Kb=\frac{Kw}{Ka}=\frac{1x10^{-14}}{1x10^{-20}}  =1x10^{-6}

Next, the acid dissociation in the presence of the base we have:

Kb=\frac{[OH^-][HA]}{[A^-]}=1x10^{6}=\frac{x*x}{0.1-x}

Whose solution is x=0.0999M which equals the concentration of hydroxyl in the solution, thus we compute the pOH:

pOH=-log([OH^-])=-log(0.0999)=1

Finally, since the maximum scale is 14, we can compute the pH by knowing the pOH:

pH+pOH=14\\\\pH=14-pOH=14-1\\\\pH=13

Regards.

5 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASEE HELPPP
Masja [62]

Answer:

hope its not to late..............Samira's model correctly demonstrates how the properties changed with the rearrangement of the atoms. However not all atoms are accounted for. There is a missing reactant. Samira's model correctly demonstrated how the atoms in two compounds reacted to form two new products. However, the elements present in the reactants side should be the elements that make up the new products in the product side. But as the diagram shows, Sameera has mistakenly added a new element to one of her products which will be wrong.

Explanation:

8 0
2 years ago
Calculate the wavelength of a red light with a frequency of 4.61 x 1012 Hz.
Naddika [18.5K]

Answer:

4665.32

Explanation:

4 0
2 years ago
A yellow tulip and a red tulip are _____.
irina1246 [14]

Answer:

variations of the same species

Explanation:

hope this helps have a good day

7 0
2 years ago
Read 2 more answers
Other questions:
  • If 355 mL of 1.50 M aluminum nitrate is added to an excess of sodium sulfate, how many grams of aluminum sulfate will be produce
    8·1 answer
  • I saw someone answered this question but I couldn’t see the answer-
    15·1 answer
  • What discovery occurred after Mendeleev’s periodic table was published that allowed Moseley to improve it?
    8·2 answers
  • During an exothermic reaction, ΔH for the reactants was 890 kJ/mol. Which of the following statements is correct about the ΔH fo
    6·2 answers
  • Hi there! could someone help with this? its due today.
    12·2 answers
  • Will an atom gain or lose an electron? CER
    11·1 answer
  • 8. Water behind a dam, a moving car, and electricity moving in a circuit all are examples of
    11·1 answer
  • Which is another word for 10 meters in the metric system?
    13·1 answer
  • An unbalanced chemical equation for the reaction of boron fluoride with lithium sulfite is shown below. BF3 + Li2SO3 Right arrow
    12·2 answers
  • Which substance would be expected to have the highest electrical conductivity? A. Al(s) B. Al₂O₃(s) C. MgCl₂(aq) D. HCl(g)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!