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
12345 [234]
3 years ago
7

Story:Mr Krabs created a secret ingredient for a breath mint that he thinks will "cure" the bad breath people get from eating cr

abby patties. He had 50 customers (group A) ear a breath mint after they finish eating. The other 50 customers (group B) also recieved a breath mint after eating, however it was just a regular breath mint and did not have the secret ingredient. Both groups were told they were getting the breath mint that would cure their bad breath. two hours after eating the crabby patties 30 customers in Group A and 10 customers in Group B reported havibg better breath then they normally had after eating pattiex.
Question:Why do you think 10 people in Group B reported fresher breath?
Chemistry
1 answer:
Daniel [21]3 years ago
3 0
They had fresher breathe because their breathe may have been bad before.
You might be interested in
Need help asap!!!
RSB [31]

B) they are the same

7 0
3 years ago
A flexible container at an initial volume of 4.11 L contains 2.51 mol of gas. More gas is then added to the container until it r
Nitella [24]

Answer:

7.81 moles

Explanation:

To solve this problem, let us generate an expression involving volume and number of mole of the gas since the pressure and temperature of the gas are constant.

From ideal gas equation:

PV = nRT

Divide both side by P

V= nRT/P

Divide both side by n

V/n = RT/P

Since RT/P are constant, then:

V1/n1 = V2/n2

Data obtained from the question include:

V1 = 4.11

n1 = 2.51 moles

V2 = 16.9L

n2 =?

Using the above equation i.e V1/n1 = V2/n2, the final number of the gas can be obtained as illustrated below:

4.11/2.51 = 16.9/n2

Cross multiply to express in linear form

4.11 x n2 = 2.51 x 16.9

Divide both side by 4.11

n2 = (2.51 x 16.9) / 4.11

n2 = 10.32moles

Now, to obtain the number of mole of the gas added, we'll subtract the initial mole from the final mole i.e

n2 — n1

Number of mole added = n2 — n1

10.32 — 2.51 = 7.81 moles

Therefore, 7.81 moles of the gas was added to the container

3 0
3 years ago
A 0.944 M solution of glucose, C6H12O6, in water has a density of 1.0624 g/mL at 20∘C. What is the concentration of this solutio
____ [38]

Answer:

Mole fraction: 0,0157.

Molality: 0,889m

Mass%: 16%

Explanation:

<em>The units are mole fraction, molality and mass%</em>

<em />

Units of mole fraction are moles of glucose per total moles.

Moles of glucose assuming 1L are:

0,944 moles.

Moles of water in 1L are:

1L × (1,0624kg/L) × (1000g / 1kg) × (1mol / 18,02g) = <em>59,0 moles of water</em>

<em />

Mole fraction is: 0,944 moles / (59,0 mol + 0,944mol) = <em>0,0157</em>

Molality is mole of solute (0,944) per kg of solution (1,0624kg):

0,944mol / 1,0624kg = <em>0,889m</em>

<em></em>

In mass percent total mass is 1062,4g and mass of 0,944 moles of glucose is:

0,944mol×(180,156g/1mol) = 170g of glucose. Mass%:

170g / 1062,4g ×100 = <em>16%</em>

<em></em>

I hope it helps!

6 0
3 years ago
A technician has been given 250 ml of 15% acetic acid solution. the pharmacist has asked the tech to dilute the solution to 500
kupik [55]
7.5<span>% acetic acid solution.</span>
7 0
3 years ago
The following label was found on a bottle of liquid hydrocarbons in the laboratory of Dr. Ima Turkey following his disappearance
lana66690 [7]

If you draw the given compound you would see that the longest chain have 8 carbons, so the compound is octone not heptane.

Now you give indices for each carbon atom involved in the principal carbon chain in such a way the substituents are heaving the lowest number.

The correct name of the compound is:

2,4,6,6-tetramethyl-octane

In the attached figure you may see the drawing of the molecule.

6 0
3 years ago
Other questions:
  • How many moles of MgCl2 are there in 319 g of the compound?
    5·1 answer
  • Which of the following groups of atoms are most likely to have similar properties?
    12·2 answers
  • Explain why either liquids nor gases have permanent shapes
    14·1 answer
  • Oil coats the surface of the water, endangering sea life during an oil spill. Why doesn’t oil dissolve in ocean water?
    5·1 answer
  • My teacher gave this assignment for homework, and I don’t get it. A little help please?
    13·1 answer
  • What is bioleaching
    13·2 answers
  • Whereas sodium is found mainly in the extracellular fluid, most ________ is found in the intracellular fluid.A) ironB) chlorideC
    8·1 answer
  • Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from =3 to =1.
    15·1 answer
  • I NEED THIS ASAP ILL GIVE BRAINLIEST
    14·2 answers
  • The interhalogen ClF₃ is prepared in a two-step fluorination of chlorine gas:Cl₂(g) + F₂(g) ⇄ CIF(g) CIF(g) + F₂(g) ⇄ CIF₃(g)(a)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!