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
RoseWind [281]
2 years ago
13

The substance that releases 21.2 kJ of energy when 1.42 mol of it freezes is____________

Chemistry
1 answer:
viktelen [127]2 years ago
4 0

Answer:

It's Fe

Explanation:

TruSt mE

just finished

You might be interested in
What inorganic molecule is carbon normally found in?
DiKsa [7]

It’s CO2

Carbon dioxide

6 0
3 years ago
Calculate the mass of CaCl2•2H2O required to make 100.0 mL of a 0.100 M solution. Each of the calculations below will take you t
Zolol [24]

Answer:

The mass is 1.4701 grams and the moles is 0.01.

Explanation:

Based on the given question, the volume of the solution is 100 ml or 0.1 L and the molarity of the solution is 0.100 M. The moles of the solute (in the given case calcium chloride dihydride (CaCl2. H2O) can be determined by using the formula,  

Molarity = moles of solute/volume of solution in liters

Now putting the values we get,  

0.100 = moles of solute/0.1000

Moles of solute = 0.100 * 0.1000

= 0.01 moles

The mass of CaCl2.2H2O can be determined by using the formula,  

Moles = mass/molar mass

The molar mass of CaCl2.2H2O is 147.01 gram per mole. Now putting the values we get,  

0.01 = mass / 147.01

Mass = 147.01 * 0.01

= 1.4701 grams.  

4 0
3 years ago
What is the ph of the benzoic acid solution prior to adding sodium benzoate?
Reika [66]
The acid dissociation constant of benzoic acid is 6.5 x 10^-5. Therefore, the pH of the benzoic acid solution prior to adding sodium benzoate is:

pH = -log[Ka]
pH = -log (6.5 x 10^-5)
pH = 4.19

The pH of the benzoic acid solution is 4.19 which is acidic, but a weak acid. 

7 0
3 years ago
Someone please help! I will give Brainliest to who answers the best! Write an explanation of how mass determines (or affects) th
xxTIMURxx [149]
Gravity is the force of motion pulling down objects to the ground. If there was no gravity, everyone would walking as if they were on the moon.


Mass is what gravity needs. If an object has a little amount of mass, gravity will be able to easily bring it to the ground.


If an object has a very huge amount of mass, gravity will still be able to bring it to the ground but it will be hard.


For example: An airplane has a HUGE amount of mass. Gravity pulls it down but the airplane needs to be steering up in order for it to be straight. Gravity is applied on the airplane when it is landing.

BUT..... if a table is in the way of an object it depends if it will fall down to the ground or stay on the table.

If an object has little mass and a table is in the way of gravity pulling it down to the ground, the object will stay on the table. Like a plate of food on a table.

If an object has a very big amount of mass and a table is in the way of gravity pulling it to the ground, the object will break the object and make it's make to the ground. That is mostly why most of the time people have very strong tables/ anything to hold a heavy object.  


Another example is if you're lifting weights and you have little amount of mass, you're most likely to get the little sized weight. It depend on you mass.


Here are some pictures I included here as well of Mass and gravity.

Glad to help! :) :D

8 0
3 years ago
What does Prokaryotic have that other cells does not
stiks02 [169]

Answer:

Prokaryotes are unicellular organisms that lack membrane-bound structures, the most noteworthy of which is the nucleus. ... While prokaryotic cells do not have membrane-bound structures, they do have distinct cellular regions. In prokaryotic cells, DNA bundles together in a region called the nucleoid.

4 0
3 years ago
Other questions:
  • What is the house off Neutron​
    15·1 answer
  • Part A What is the numerical value of Kc for the following reaction if the equilibrium mixture contains 0.51 M C3H6O, 0.30 M O2,
    15·1 answer
  • is a cation or anion. In the second row, write the symbol for the ion that an atom of fluorine is mostly likely to form and then
    7·2 answers
  • hat is the pressure of CO(g) in equilibrium with the CO2(g) and O2(g) in the atmosphere at 25 ????C? The partial pressure of O2(
    7·1 answer
  • Pls help me out!! lol
    12·1 answer
  • Calculate the velocity of an ocean wave that has a wavelength of 5 meters and a frequency of 2 Hertz (Hz).
    10·2 answers
  • Is the reaction balanced?
    13·1 answer
  • Data collected that describes the quality of the data set is called _______ data.
    5·1 answer
  • The subatomic particle that is different in isotopes
    7·1 answer
  • If 82.5 mol of an ideal gas occupies 10.5 l at 317 k, what is the pressure of the gas?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!