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
zavuch27 [327]
3 years ago
10

11. Explain Supergiants

Chemistry
1 answer:
NeTakaya3 years ago
4 0
The correct answer is C. They are unusually large. I would appreciate if you would mark this is brainlyest answer. Thank you!
You might be interested in
We are trying to build a good model of the _____________ that are happening on the tectonic plates under us.
Arturiano [62]

Answer:

scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years.

Explanation:

i'm in the 7th grade

8 0
3 years ago
How would you prepare 500 ml of the following solutions : Sodium succinate buffer (0.1 mol/dm3 pH 5.64)
Nana76 [90]

Answer:

8.10g of sodium succinate must be added and 247mL of 0.1M HCl adding enough water until make 500mL

Explanation:

<em>Succinic acid has a pKa₂ of 5.63</em>

To solve this question we must find the amount of sodium succinate and 0.1M HCl that we have to add using H-H equation:

pH = pKa + log [A-] / [HA]

5.64 = 5.63 + log [Na₂Succ.] / [HSucc⁺]

0.01 = log [Na₂Succ.] / [HSucc⁺]

1.0233 = [Na₂Succ.] / [HSucc⁺] <em>(1)</em>

As:

0.1M = [Na₂Succ.] + [HSucc⁺] <em>(2)</em>

Replacing (2) in (1):

1.0233 = 0.1M - [HSucc⁺] / [HSucc⁺]

1.0233[HSucc⁺] = 0.1M - [HSucc⁺]

2.033[HSucc⁺] = 0.1M

[HSucc⁺] = 0.0494M

[Na₂Succ] = 0.0506M

Both [Na₂Succ⁺] and [HSucc⁺] ions comes from the same sodium succinate we have to find the moles of sodium succinate in 500mL of 0.1M. Then, based on the reaction:

Na₂Succ + HCl → HSucc⁺ + Cl⁻

The moles of HCl added = Moles HSucc⁺ we need:

<em>Moles Na₂Succ:</em>

0.500L * (0.1mol/L) = 0.0500 moles

<em>Mass -Molar mass sodium succinate: 162.05g/mol-:</em>

0.0500mol * (162.05g/mol) = 8.10g of sodium succinate must be added

<em>Moles HCl:</em>

0.0494M * 0.500L = 0.0247 moles HCl * (1L / 0.1mol) = 0.247L =

And 247mL of 0.1M HCl adding enough water until make 500mL

7 0
3 years ago
12. Draw the lewis structure for the element to help you answer the question *
lorasvet [3.4K]

Answer:hope it helps

Explanation:

5 0
3 years ago
How many mm are in 38,987 L?
OlgaM077 [116]

Answer:

38987000

Explanation:

there are 1000 ml in a Liter.

Hope this helps!

6 0
3 years ago
The empirical formula for carbohydrates is CH2O. The molecular weight for a particular carbohydrate is 90.09 grams. What is the
baherus [9]
We find the weight of the empirical formula:
12.0107 + 2 x 1.00794 + 15.9994
= 30.03

Now, we divide the molecular weight by the weight of the empirical formula to find the number of times the empirical formula repeats:
90.09 / 30.03
= 3

The formula is 3(CH₂O)
C₃H₆O₃
6 0
3 years ago
Other questions:
  • Why are carboxylic acids more acidic than alcohols or alkynes? (choose all that apply)
    10·1 answer
  • The Lewis structures of four compounds are given. In the first molecule sufur is the central atom. There are two oxygen atoms bo
    11·1 answer
  • If 655j are added to ethanol (grain alcohol) and its temperature rises from 18.2 C to 32.8 C, what is the mass of the ethanol sa
    14·1 answer
  • Which of the following occurs because of unequal heating of the Earth's surface?
    8·2 answers
  • Is calcium and chlorine am Ionic bond?
    6·2 answers
  • when a piece of potassium metal is placed in water a violent reaction occurs. when copper metal is placed in water nothing happe
    8·1 answer
  • Use the periodic table to complete each nuclear fusion equation.
    5·1 answer
  • Is wood, the sun, and water biotic resource?<br><br> ANSWER ASAP NOW!!!!<br> 25 POINTS
    15·2 answers
  • https://www.ck12.org/assessment/tools/geometry-tool/plix.html?eId=SCI.CHE.124.5&amp;questionId=53dfa5538e0e087de33b6cb1&amp;arti
    10·1 answer
  • Discuss potential advantages and disadvantages of using water as a solvent in organic chemistry.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!