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
sukhopar [10]
3 years ago
8

How many moles of ethanol, C2H5OH, are in a sample which weighs 39.2 g? (Hint: your answer needs to be less than the 1 mole b/c

you're asked about the mole equivalent of 39.2g, which is less than 1 mole of ethanol)
Chemistry
1 answer:
m_a_m_a [10]3 years ago
7 0

Answer:

Explanation:

To find how many moles are in the sample, you first must calculate how much one mole of C2H5OH weighs.

2(mass of C) + 5(mass of H) + (mass of O) + (mass of H)

= 2(12.01) + 5(1.008) + (16.00) + (1.008) = 46.068 g/mol

So, now that we know what 1 mole weighs, we can simply divide the weight of the sample by the weight of a mole of ethanol to get our answer.

39.2 / 46.068 = approximately 0.851 mol of ethanol

You might be interested in
use the periodic table to determine the molar mass of each of the following elements. Use the correct number of significant figu
Yanka [14]

Answer: Potassium is 39.10 g/mol

Explanation: The numbers below the element are the molar mass.

3 0
3 years ago
Read 2 more answers
How would the concentration of silver ions compare in a 1.0 x 10-16 L saturated solution to a 1.5 x 10-16 L saturated solution?
VMariaS [17]
The second one is more concentrated as they both times with the same thing but the second one (1.5) is bigger
3 0
3 years ago
Fire extinguishers that spray carbon dioxide on the fire, work very effectively because it forms a blanket around the burning ma
Arte-miy333 [17]

Answer:

I think it will option B it will retain enough heat

8 0
3 years ago
Harry has a sample of an unknown material. The sample has a mass of 81 grams and a volume of 0.9 cubic centimeters. What is the
Salsk061 [2.6K]
Density = mass/volume
density = 81 grams/0.9 cubic centimetersdensity = 90 grams per cubic centimeter
The density of the sample is 90 grams per cubic centimeter.
8 0
3 years ago
Describe examples of failed experiments that produced valuable information
Nataliya [291]
Hello Norgepr, examples of failed experiments that produced valuable information can be the mage via BoingBoing There have been ample stories of human children being raised by other species and eventually becoming more like that animal than an actual human. If the process could go one way, Winthrop Kellogg was sure that it could also go the other, particularly if the animal involved was one of our closest genetic cousins. In 1931, Kellogg received a grant for his experiment and the timing couldn’t be better –his wife just had a baby boy, David. This would give them the unique opportunity to raise a baby chimp, named Gua, right along side a human baby. It didn’t take long for the babes to bond and become best friends. Kellogg and his wife took impeccable notes on their two “children” noting their physical changes, emotions and how they scored on small intelligence tests. The chimp scored notably higher on the intelligence tests due the fact that the species matures faster than human babies. Gua picked up quite a few human behaviors, such as walking upright and eating with a spoon, but she failed to learn how to speak and learn simple repetition games, like patty cake. Her emotions were also much less predictable and inclined to change at the drop of a hat. Unfortunately, the experiment really started to go wrong when little David started to become more chimplike than Gua became humanlike. He only learned a few simple words and often took to making chimp howls when he wanted something. After only nine months, the Kelloggs gave up on Gua, concerned that David would fail to grow up like a normal human child. In the years since this project, plenty of people have adopted chimps as babies, proving beyond a doubt that the animals can never act completely human –even if they are adorable in overalls.
3 0
3 years ago
Other questions:
  • Write the chemical equation for fot the reaction between mgcl2 and the soap you preapred
    8·1 answer
  • How can a charged atom (an ion) attract a neutral atom? 1. the charged atom can hit the neutral atom and make it positively char
    14·1 answer
  • Copper has an atomic number of 29. that means that there are 29 protons in the nucleus of each copper atom. That's what the atom
    13·1 answer
  • What are properties of colloid
    12·1 answer
  • The volume of a gas is 450ml when it’s pressure is 1.00ATM. If the temperature of the gas does not change what is the pressure w
    15·2 answers
  • At birth, a lion cub is:
    5·2 answers
  • Which of the following statements about elements is not true?
    9·1 answer
  • A metal atom and a non-metal atom bond together. What type of bond do they form?
    8·1 answer
  • 11) How many grams are in 2.3 moles of magnesium chloride, MgCl,?<br> 1
    9·1 answer
  • Help me with this plssss​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!