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
aleksley [76]
2 years ago
12

How many moles are in 6.777 x 1023 atoms of CO2. Watch your significant figures. Question 2 options: 1 atoms CO2 1.125 moles CO2

1.13 moles 1.13 atoms CO2
Chemistry
1 answer:
Archy [21]2 years ago
6 0

Answer:

1.13moles

Explanation:

Given parameters:

Number of atoms  = 6.777 x 10²³ atoms

Unknown:

Number of moles  = ?

Solution:

A mole of a substance contains the avogadro's number of particles

       6.02  x  10²³ particles   = 1 mole

      6.777 x 10²³ atoms will contain \frac{ 6.777 x 10^{23}  }{6.02 x 10^{23} }   = 1.13moles

You might be interested in
The process to separate the various components of a liquid mixture is called a fractional distillation true false
Black_prince [1.1K]
Decantation<span>Decantation is a process for the separation of mixtures, by removing a layer of liquid, generally one from which a precipitate has settled. The purpose may be either to produce a clean decant, or to remove undesired liquid from the precipitate (or other layers). Separate liquids
so it is false</span>
4 0
2 years ago
Read 2 more answers
What is the name of the following compound - AgNO3 *
Alinara [238K]

Answer:

Silver Nitrate

Explanation:

5 0
2 years ago
A freezer compartment is covered with a 2-mm-thick layer of frost at the time it malfunctions. If the compartment is in ambient
ruslelena [56]

Answer:

The time required to melt the frost is 3.25 hours.

Explanation:

The time required to melt the frost dependes on the latent heat of the frost and the amount of heat it is transfered by convection to the air .

The heat transferred per unit area can be expressed as:

q=h_c*A*\Delta T\\\\q/A=h_c*\Delta T

being hc the convective heat transfer coefficient (2 Wm^-2K^-1) and ΔT the difference of temperature (20-0=20 °C or K).

q/A=h_c*\Delta T=2\frac{W}{m^2K}*20K=40\frac{W}{m^2}

If we take 1 m^2 of ice, with 2 mm of thickness, we have this volume

V=T*A = 0.002 m * 1 m^2=0.002m^3

The mass of the frost can be estimated as

M=\rho * V=700\frac{kg}{m^3}*0.002m^3= 1.4 kg

Then,  the amount of heat needed to melt this surface (1 m²) of frost is

Q=L*M=334\frac{kJ}{kg}*1.4kg= 467.6kJ

The time needed to melt the frost can be calculated as

t=\frac{Q}{(q/A)}=\frac{467.6kJ/m2}{40W/m2} = 11.69\frac{kJ}{W}*\frac{1W*s}{1J}*\frac{1000J}{1kJ}=   11690s=3.25h

7 0
2 years ago
True or False, the central atom in a molecule is the one with the highest electron affinity.
PtichkaEL [24]
False. Chlorine has the most.
8 0
3 years ago
Write the name and formula for the chemical substance which is produced in most acid-base neutralization reactions
Minchanka [31]
Acid + base gives you salt and H2O
7 0
3 years ago
Other questions:
  • Help, cant get it. Answers in picture
    11·1 answer
  • Salt is ionic, and oil is covalent. If you add water, the salt will dissolve in the water, and the oil will float to the top. Yo
    11·1 answer
  • What are three observable changes that show a chemical reaction?
    6·1 answer
  • What are two ways that organisms gather information about the environment
    14·1 answer
  • Which of these substances contributes to soap's slippery texture?
    12·1 answer
  • Chocolate drink can easily be dissolved in<br>​
    15·1 answer
  • Find the block labeled ? in Figure 2. What is its atomic number? How many valence electrons does it have? Which of the elements
    15·2 answers
  • How could I study for my science test on science inquiry?
    10·1 answer
  • Atoms combine to form?
    7·1 answer
  • All electromagnetic waves travel at the same speed in a vacuum, usually referred to as the speed of light. This speed is approxi
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!