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
Komok [63]
3 years ago
7

Which of the following structures in the human eye most likely functions in a way to help humans see clearly in different levels

of light? A. The iris, or the colored portion of the eye
B. The white area
C. The eyelid
D. The pupil, or the dark portion at the center of the eye ​
Chemistry
1 answer:
Gre4nikov [31]3 years ago
7 0

D. the pupil or the dark portion at the center of the eye

You might be interested in
In preparation for a demonstration, your professor brings a 1.50−L bottle of sulfur dioxide into the lecture hall before class t
Marrrta [24]

Answer:

0.66 mol

Explanation:

Zero Gauge pressure = 14.7 psi

Pressure read = 173 psi

Actual pressure = 173 psi - 14.7 psi = 158.3 psi

P (psi) = 1/14.696  P(atm)

So, Pressure = 10.77 atm

Given that:

Temperature = 20 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (20+ 273.15) K = 298.15 K

V = 1.50 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L atm/ K mol  

Applying the equation as:

10.77 atm × 1.50 L = n ×0.0821 L atm/ K mol  × 298.15 K

⇒n = 0.66 mol

6 0
3 years ago
What is a 2.48x10^3 atm ____mm Hg
ZanzabumX [31]
I'm assuming that you want to covert atmospheres into mmHg.

mmHg is exactly like torr: there are 760 of them in an atmosphere.

The conversion would be 760 mmHg = 1 atm

Knowing this, simply multiply 2.48 * 10^3 by 760:
2.48 * 10^3 * 760 = 1,884,800 mmHg.

But wait! I'm assuming you probably meant to write 2.48 * 10^-3, since 1,884,800 is an awfully big number.

In that case:

2.48 * 10^-3 * 760 = 1.8848 mmHg

-T.B.
7 0
3 years ago
What is the tool to determine the relative size of things
weqwewe [10]
That would be a measurer
4 0
3 years ago
What does the chemical formula cacl2 show about the compound it represents?
Anna [14]
A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.
7 0
3 years ago
Read 2 more answers
Rank the speeds of sound through these materials, from greatest to least:a. Airb. Steelc. Water
s344n2d4d5 [400]

Ranking order of speed of sound is; Steel >Water > Air.

Speed of sound in normal air is 340 m/s, in water the speed is 1,430 m/s and in steel the speed is 5920 m/s.

<h3>What is speed of sound?</h3>

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. The speed of sound in an ideal gas depends only on its temperature and composition. The speed of sound in mathematical notation is conventionally represented by 'c'. The speed of sound is variable and depends on the properties of the substance through which the wave is travelling.

learn more about speed of sound: brainly.com/question/20319989

#SPJ4

7 0
1 year ago
Other questions:
  • Water is a pure substance. Which of the following is true about water?
    12·1 answer
  • Potassium carbonate, K2CO3, sodium iodide, NaI, potassium bromide, KBr, methanol, CH3OH, and ammonium chloride, NH4Cl, are solub
    5·1 answer
  • sarah is on a road trip with a friend. their car has a 15-gal tank and averages 30 mi/gal. how many miles can they travel on a f
    13·2 answers
  • Silicones can be oils or rubber-like materials depending on ________. Select one: A. the silicon-to-oxygen ratio B. the length o
    14·1 answer
  • What is the valence electron configuration of the group 2a elements?
    7·1 answer
  • How many milliliters of 0.100 M Ba(OH)2 are required to neutralize 20.0 mL of 0.250 M HCl?
    15·2 answers
  • Every year 5.5 billion tons of carbon is released through burning fossil fuels . Compare this to the weight of adult African ele
    10·1 answer
  • The molality of a solution that is made by dissolving a certain mass of ethanol in 85.4 g of water is 0.950 m. How many moles of
    5·1 answer
  • PLEASE HELP ME ASAP!!! THIS IS DUE UNTIL 1:30 PM!!! Tell how many Elements are in this compound and tell what the Elements are.
    13·2 answers
  • How to make a volcano lamp fuse
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!