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
Otrada [13]
2 years ago
9

Determine the number of molecules in 3.79 kilograms of the fictional compound Cs7(Cr5O3)4. Include the units, but do not write t

he chemical formula. Round the answer to 3 significant figures.
Chemistry
1 answer:
Karo-lina-s [1.5K]2 years ago
7 0

Answer:

1.0555 * 10^24 molecules

Explanation:

Number of molecules = ?

Mass = 3.79  Kg = 3790 g

Molar mass of Cs7(Cr5O3)4 = 2162.25 g/mol

Number of moles = Mass / Molar mass

Number of moles = 3790 g / 2162.25 g/mol

Number of moles = 1.7528 mol

1 mol = 6.022 * 10^23 molecules

1.7528 mol = x

solving for x;

x = 6.022 * 10^23 *  1.7528

x = 1.0555 * 10^24 molecules

You might be interested in
Define the law conservation of mass​
denis23 [38]

Answer:

Explanation:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so the quantity can neither be added nor be removed.

hope it helps

7 0
3 years ago
If the diet is deficient in one or more of the _____amino acids, the body must break down existing proteins to provide the amino
AysviL [449]
Essential amino acids
Amino acids are the molecules that make up proteins when they are linked up. There are certain essential amino acids, namely they are <span>histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
All of these must be obtained from one's diet. If they are not, the body will use existing proteins, such as muscle mass, to obtain them.</span>
3 0
3 years ago
Read 2 more answers
Jose's lab instructor gives him a solution of sodium phosphate that is buffered to a pH of 4. Because of an error tha
oksano4ka [1.4K]

Explanation:

Can you please make the question more precise..

Thanks..

4 0
3 years ago
Which dinosaur was able to hold its prey in its mouth firmly due to teeth that curved backward?
nikitadnepr [17]
<span>Deinonychus due to its backwards teeth</span>
6 0
2 years ago
A 100-gram sample of material requires 1220 calories of heat energy to raise its temperature from 20 0C to 80 0C. What is the sp
SashulF [63]

Taking into account the definition of calorimetry, sensible heat and latent heat, the specific heat capacity of the material is 0.203 \frac{calories}{gC}.

<h3>Calorimetry</h3>

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).

The amount of heat a body receives or transmits is determined by:

Q = c× m× ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

<h3>Specific heat capacity of the material</h3>

In this case, you know:

  • Q= 1220 calories
  • c= ?
  • m= 100 g
  • ΔT=Tfinal - Tinitial= 80 C - 20 C= 60 C

Replacing in the definition of amount of heat:

1220 calories= c× 100 g× 60 C

Solving:

c= 1220 calories÷ (100 g× 60 C)

<u><em>c= 0.203 </em></u>\frac{calories}{gC}

Finally, the specific heat capacity of the material is 0.203 \frac{calories}{gC}.

Learn more about calorimetry:

brainly.com/question/14057615?referrer=searchResults

brainly.com/question/24988785?referrer=searchResults

brainly.com/question/21315372?referrer=searchResults

brainly.com/question/13959344?referrer=searchResults

brainly.com/question/14309811?referrer=searchResults

brainly.com/question/23578297?referrer=searchResults

3 0
2 years ago
Other questions:
  • Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.
    7·1 answer
  • Determine the concentration of H+ ions in an aqueous solution where [OH-] =2.25 × 10^-4 M. I have 29 minutes I beg u guys pls hu
    5·1 answer
  • An archeologist finds a 1.62 kg goblet that she believes to be made of pure gold. She determines that the volume of the goblet i
    13·1 answer
  • Choose all the answers that apply.
    6·1 answer
  • A(n) ____ is an object, person, or other entity that is a potential risk of loss to an asset
    9·1 answer
  • E. the compound sodium sulfate is soluble in water. when this compound dissolves in water what ion would be present in solution?
    6·1 answer
  • If E°(red) of a given half-cell is more negative than E°(red) for a standard hydrogen electrode, the half-cell will:
    13·1 answer
  • Are formed when atoms bond together
    14·1 answer
  • Which scientist was first to extensively develop the theory of continental drift?
    13·2 answers
  • Define the terms Genotype and Phenotype.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!