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
4 As a boulder rolls from the top of a hill to the bottom, how do its potential and kinetic energy change? *
user100 [1]

Answer:

c. Potential decreases and kinetic increases.

Explanation:

As the boulder is rolling down the hill, potential energy decreases as kinetic energy increases.

Please Brainliest me

4 0
3 years ago
Read 2 more answers
Why is the circulatory system so important? please explain in own yours I keep getting copy and paste please don’t do that it’s
expeople1 [14]

<u>Importance </u><u>of </u><u>Circulatory </u><u>System</u>

  • This system helps in transportation of respiratory gases like O2 and CO2, nutrients, hormones, enzymes, minerals, waste products.
  • It helps in storage of essential substances for future use.
  • It also generates heat to the body.

Hope you could understand.

If you have any query, feel free to ask.

7 0
3 years ago
A piece of metal with a mass of 611 g is placed into a graduated cylinder that contains 25.1 mL of water rising the water level
djyliett [7]

Answer:

The answer is

<h2>2.64 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass = 611 g

volume = final volume of water - initial volume of water

volume = 256.7 - 25.1 = 231.6 mL

The density of the metal is

density =  \frac{611}{231.6}  \\  = 2.638169257...

We have the final answer as

<h3>2.64 g/mL</h3>

Hope this helps you

5 0
3 years ago
Class science A lunar eclipse occurs when
NeTakaya

Answer:

when the moon passes through earth's shadow

Explanation:

I'll be back soon I have to do my world History test

3 0
3 years ago
Read 2 more answers
The bond dissociation energy for nitrogen is 941 kj/mol. what is this value in calories
muminat
<span>If 1 kj/mol is 0.239 kilocalories/ mol, then 941 kj/mol is 224.904 kcal/mol or 224904 cal/mol. They both are energy units. The joule is the International System unit. It is ultimately defined in terms of the meter, kilogram, and second. One calorie is the amount of heat required to raise the temperature of 1 gram of water by 1°C</span>
6 0
4 years ago
Other questions:
  • What is the volume of 3.66 x 1032 molecules of fluorine gas at STP?
    5·1 answer
  • How many valence electrons are in oxygen?
    6·1 answer
  • Magnesium and oxygen balanced
    11·1 answer
  • What is the melting point of the substance?
    14·1 answer
  • Question 2 (1 point)
    15·1 answer
  • Hello everyone! I have a question about science;
    14·1 answer
  • What is the object called that burns as it enters the atmosphere and causes an shooting star?
    7·1 answer
  • Brainliest if CORRECT<br><br><br><br><br><br><br> 11
    14·2 answers
  • Why do you think the reaction between tetraphenylcyclopentadienone and dimethyl acetylenedicarboxylate can be conducted at relat
    7·1 answer
  • The specific heat of aluminum is 0.902 J/g C. If a one gram sample of aluminum absorbs 50 Joules of energy, how much with its te
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!