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
lakkis [162]
3 years ago
9

Students in Ms. Winters' class were interested in testing the antibacterial strength of hand soap versus hand sanitizer. The stu

dents planned to wash their hands using the sanitizer or soap and warm water for two minutes, then dry their hands with a paper towel. The standard of comparison would be rubbing their hands vigorously for 2 minutes in warm water, without any soap or sanitizer, and then drying with a paper towel. The sanitizer advertisement claimed to kill bacteria more effectively than any soap. After washing, hands would be swabbed and then the swab applied to a culture plate and incubated. Finally, the bacterial cultures would be counted.
What would be an appropriate research question to guide this scientific investigation?
A) What method kills bacteria?
B) Under what conditions does bacteria grow best?
C) Is hand sanitizer more effective in killing bacteria than hand soap?
D) How does using hand sanitizer to kill bacteria compare to using just warm water?
Chemistry
2 answers:
Serhud [2]3 years ago
4 0
I would say <span>C) Is hand sanitizer more effective in killing bacteria than hand soap </span>
KatRina [158]3 years ago
3 0
My answer is a please tell me if I helped
You might be interested in
Why is there not a corresponding drop in ionization energies between Bi and Po in the sixth period as N and O?
Stels [109]

Answer:

See explanation

Explanation:

According to the Journal of Chemical Education, Volume 80, No.8 (2003); "The first ionization energy of bismuth appears to be  anomalous......It has been claimed that spin– orbit coupling by the Russell–Saunders scheme would lower  the ground state of Bi+ ..."

However, the involvement of  d and f orbitals in Bi and Po implies that the outermost orbitals are poorly screened hence the drop between nitrogen and oxygen is not observed between Bi and Po.

The same argument could be extended to explain the reason why  there not a corresponding drop between Ba and Tl is the sixth period even though they are in the same group as Be and B.

3 0
3 years ago
What is the IUPAC name for the compound shown below? ch3ch2ch2cnhch2ch3
Nataly_w [17]

We need the  IUPAC name of the given compound.

The IUPAC name is: Hexan-3-imine.

The molecule has six carbon atoms in its skeleton. C=NH bond is attached to the skeleton at 3-position.

The functional group present in this molecule is imine (C=NH).

3 0
3 years ago
Read 2 more answers
PLZ HURRY
Oxana [17]

Answer:

C

Explanation:

3 0
3 years ago
Read 2 more answers
Find the pH of a solution that has an H+ concentration of 2.5x10-3 M
Nastasia [14]

Answer:

The pH is 2, 60

Explanation:

The pH gives us an idea of the acidity or basicity of a solution. It is calculated as:

pH = -log (H +)= -log (2.5x10-3 )

<em>pH=2, 60</em>

7 0
3 years ago
Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to the reactio
umka21 [38]

Answer : The value of K_p at this temperature is 66.7

Explanation : Given,

Pressure of PCl_3 at equilibrium = 0.348 atm

Pressure of Cl_2 at equilibrium = 0.441 atm

Pressure of PCl_5 at equilibrium = 10.24 atm

The balanced equilibrium reaction is,

PCl_3(g)+Cl_2(g)\rightleftharpoons PCl_5(g)

The expression of equilibrium constant K_p for the reaction will be:

K_p=\frac{(p_{PCl_5})}{(p_{PCl_3})(p_{Cl_2})}

Now put all the values in this expression, we get :

K_p=\frac{(10.24)}{(0.348)(0.441)}

K_p=66.7

Therefore, the value of K_p at this temperature is 66.7

4 0
3 years ago
Other questions:
  • One hundredth of a meter is called a
    12·1 answer
  • Given the chemical formulas Na2O, MgO, and Al2O3, predict the formula for radioactive francium oxide, Fr?O?.
    10·2 answers
  • As an acid is added to neutral water the H will
    15·2 answers
  • Which type of property can be observed only by changing a substance into a different substance? A. intensive property B. extensi
    8·2 answers
  • Balance these equations <br> N2 + O2 &gt; NO
    10·1 answer
  • How do enzymes function in biological reactions?
    6·1 answer
  • How does conc.H2SO4 reacts with sugar?​
    8·1 answer
  • What is the fancy psychological term for "mental process"?
    7·1 answer
  • Đốt cháy hoàn toàn một amin đơn chức thu được CO2 và H2O theo tỉ lệ nCO2 : nH2O = 6 : 7. Vậy CT amin đó là
    7·1 answer
  • What is a mixture ?<br><br> How do homogeneous &amp; heterogeneous mixtures differ ?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!