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
olasank [31]
3 years ago
13

How many grams of sodium bromide must be dissolved in 400.0 g of water to produce a 0.500 molar solution?

Chemistry
1 answer:
kiruha [24]3 years ago
8 0

Answer:

D. 20.6g

Explanation:

Molarity is defined as ratio between moles of solute (sodium bromide, NaBr) per liter of water.

As density of water is 1g/mL; volume of 400.0g of water is 400.0mL = 0.4000L.

That means 0.400L of 0.500M solution contains:

0.400L × (0.500mol / 1L) = <em>0.200moles of sodium bromide</em>.

In mass (NaBr = 102.9g/mol):

0.200mol NaBr × (102.9g/mol) = 20.6g of NaBr

Right answer is:

<em>D. 20.6g</em>

You might be interested in
What is the tail of a comet made of? A. Heat B. Asteroids C. Melted materials D. Solar wind
grigory [225]
It's actually made or gas and dust that can extend hundreds of millions of kilometers away from the coma. most comets actually have two tails a plasma tell made of ionized gas and a dust tail made of small solid particles.
3 0
3 years ago
Read 2 more answers
Mercury has a density of 13.56 g/ml. What is the volume in L of 52 kg of mercury?
sweet [91]

Hello!

Given the density of mercury being 13.57 g/mL, and the mass of 52 kilograms, we need to find the volume.

To find the volume, we need to divide mass by density (V = m/d).

Notice that you are given 52 kilograms, but not grams. To convert kilograms to grams, you need to multiply it by 1000.

52 x 1000 = 52000 grams

With the correct measurements, we can find the volume.

V = 52000 grams / 13.56 grams/milliliter

V ≈ 3834.80826

Therefore, the volume of the mercury is about 3,834.81 mL.

5 0
4 years ago
What is the definition of an Arrhenius acid?
Lorico [155]

Answer:

I <u>think</u> your answer is: C. ("An Arrhenius acid increases [H +] in the solution.")

Explanation:

An Arrhenius acid is a substance that dissociates in water to form hydrogen ions (H + ); that is, an acid increases the concentration of H + ions in an aqueous solution. This causes the protonation of water, or the creation of the hydronium (H 3 O +) ion.

Hopefully this helps!

Have a great day! ^^

5 0
3 years ago
At 60°c, the ion-product constant of water, kw, is 9.25 × 10–14 . what is the ph of pure water at 60°c ?
Rus_ich [418]

Answer:

6.517.

Explanation:

  • It is known that for pure water: [H₃O⁺] = [OH⁻], so water is neutral.  

  • It also is known that:

<em>Kw = [H₃O⁺][OH⁻] = 9.25 x 10⁻¹⁴.</em>

∵ [H₃O⁺] = [OH⁻].

∴ [H₃O⁺]² = 9.25 x 10⁻¹⁴.

∴ [H₃O⁺] = √(9.25 x 10⁻¹⁴) = 3.041 x 10⁻⁷ M.

∵ pH = - log[H₃O⁺]

<em>∴ pH</em> = - log(3.041 x 10⁻⁷) = <em>6.517.</em>

3 0
3 years ago
Please help me someone it's due today thanks :D
garri49 [273]

Answer:

i think it b

Explanation:

why your teachers giving you work it thanksgiving week

3 0
3 years ago
Other questions:
  • How do your write a Noble Gas Configuration for atoms of an element?<br> 40 points!
    9·1 answer
  • In which of the following phases of matter do molecules have the lowest amount of energy?
    7·2 answers
  • What kind of inhibitors are transition state analogs usually classified as? uncompetitive inhibitors competitive inhibitors nonc
    7·1 answer
  • What are the major difference between potential and kinetic energy?​
    11·1 answer
  • Why is genetic engineering beneficial?
    8·1 answer
  • 22. If an element has 1 valence electron, it must be a(n) *
    8·2 answers
  • Which of the following would not be studied within the topic of stoichiometry?
    14·1 answer
  • For the following electrochemical cell, determine the oxidizing agent, reducing agent, and whether the cell is a voltaic cell or
    12·1 answer
  • I need help, thankyou.<br> List 5 things how Prokaryotic cell and Eukaryotic cell are alike
    10·1 answer
  • 21. Which of the following is the best way to clean up an acid spill?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!