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
maria [59]
3 years ago
10

How many kilojoules of heat are released when 32.0 g of NaOH are dissolved in water? (The molar heat of solution of NaOH is –445

.1 kJ/mol.)
Chemistry
2 answers:
Katen [24]3 years ago
6 0
The energy release when dissolving 1 mol of NaOH in water is 445.1 kJ
the mass of NaOH to be dissolved is 32.0 g
The number of NaOH moles in 32.0 g - 32.0 g / 40 g/mol =  0.8 mol
the energy released whilst dissolving 1 mol of NaOH - 445.1 kJ
when dissolving 0.8 mol - the energy released is 445.1 kJ/mol x 0.8 mol
therefore heat released is - 356.08 kJ
answer is -356.08 kJ
alisha [4.7K]3 years ago
4 0

The correct answer is -356 kJ

You might be interested in
For the following electrochemical cell, determine the oxidizing agent, reducing agent, and whether the cell is a voltaic cell or
lyudmila [28]
1637947 d hdidmbdjrn
4 0
2 years ago
A gas is collected at 20.0 °C and 725.0 mm Hg. When the temperature is
krek1111 [17]

Answer:

676mmHg

Explanation:

Using the formula;

P1/T1 = P2/T2

Where;

P1 = initial pressure (mmHg)

P2 = final pressure (mmHg)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 725.0mmHg

P2 = ?

T1 = 20°C = 20 + 273 = 293K

T2 = 0°C = 0 + 273 = 273K

Using P1/T1 = P2/T2

725/293 = P2/273

Cross multiply

725 × 273 = 293 × P2

197925 = 293P2

P2 = 197925 ÷ 293

P2 = 676mmHg.

The resulting pressure is 676mmHg

3 0
3 years ago
Mass of water using isotopes? The water found on Earth is almost entirely made up of the ^1H and ^{16}O isotopes for a formula o
jenyasd209 [6]
Thank you for posting your question here brainly. Based on the problem mentioned above the largest mass that water molecule could have using other isotopes is <span>24 amu. Below is the solution, I hope the answers helps. 

</span><span>T2_18O = 24</span>
7 0
2 years ago
Read 2 more answers
A sample of a compound contains ​0.300 mol​ ​of carbon​ and ​1.20 mol​ ​of hydrogen​. What is the ​empirical formula of the comp
Margarita [4]

Answer:

CH4

Explanation:

The number of moles of carbon and hydrogen has been given as follows:

C = ​0.300 mol​ ​

H = ​1.20 mol

Next, we divide each mole value by the smallest (0.300)

C = 0.300 ÷ 0.300 = 1

H = 1.20 ÷ 0.300 = 4

The empirical ratio of Carbon and Hydrogen is 1:4, hence, the empirical formula is CH4

3 0
3 years ago
Temperature has no effect on matter.<br><br> A <br> True<br><br> B <br> False
andrey2020 [161]

true because matter is a space not a space

5 0
3 years ago
Other questions:
  • Lead oxide is formed when a lead cation that has a charge of 2+ combines with an oxygen anion that has a charge of 2-. Using the
    10·2 answers
  • What would be the 00 Decay Rate Algorithm?
    9·1 answer
  • A small child watches you as you stir a spoonful of sugar into a glass of clear lime-flavored drink. The child says she believes
    5·1 answer
  • Need help ASAP doing a test !!
    8·1 answer
  • George knows that topography is continually being created and
    11·1 answer
  • Arthur is performing a lab which requires a 0.2 M solution of calcium hydroxide. However, the only calcium hydroxide solution av
    12·1 answer
  • Help help help help help help​
    9·2 answers
  • A sample of oxygen that occupies 2.9 X
    13·1 answer
  • For questions 14-16 pick out the variables that will be needed to answer the following question: Do trees grow faster if it is w
    9·2 answers
  • C. By examining the physical and chemical properties of evidence at a crime scene, investigators can
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!