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
tia_tia [17]
3 years ago
5

Which of the following describes a response to external stimuli?

Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
6 0
The answer to this question is A
Pavlova-9 [17]3 years ago
3 0
The correct answer is A.

Hunger, chemical imbalance, and blood levels are all internal issues. Cat dander on the other hand is not something the body creates or and is something in the environment.  
Thus, your answer is A. 
You might be interested in
Carbon bonding is almost entirely covalent. this property allows carbon compounds to _____. decompose easily, thereby providing
Korvikt [17]
The part that is missing is: make oxygen more readily available to the organism. This is actually a lifesaving property that makes itself available for living species.
7 0
3 years ago
What is the wavelength of gamma ray electromagnetic radiation with a frequency of 2.73x10^20 Hz?
Amanda [17]

Answer:

1.10 × 10⁻¹² m

General Formulas and Concepts:

<u>Chemistry - Atomic Structure</u>

Speed of Light = Wavelength times Frequency

  • c = λν
  • c = 3.0 × 10⁸ m/s

Explanation:

<u>Step 1: Define</u>

ν  = 2.73 × 10²⁰ Hz

<u>Step 2: Find wavelength</u>

3.0 × 10⁸ m/s = λ(2.73 × 10²⁰ Hz)

λ = 1.0989 × 10⁻¹² m

<u>Step 3: Check</u>

<em>We are given 3 sig figs. Follow sig fig rules.</em>

1.0989 × 10⁻¹² m ≈ 1.10 × 10⁻¹² m

8 0
3 years ago
The atoms of platinum and silver are identical (true or false)
koban [17]

Answer:

I think it's false but not sure

3 0
2 years ago
Read 2 more answers
To calculate the enthalpy change for the reaction, 2CO (g) + O2 (g) Imported Asset 2 CO2 (g), you can use ΔHf0 values for each r
svetoff [14.1K]

Answer:

ΔH0reaction = [ΔHf0 CO2(g)] - [ΔHf0 CO(g) + ΔHf0 O2(g)]

Explanation:

Chemical equation:

CO + O₂   →  CO₂

Balanced chemical equation:

2CO + O₂   →  2CO₂

The standard enthalpy for the formation of CO = -110.5 kj/mol

The standard enthalpy for the formation of O₂  = 0  kj/mol

The standard enthalpy for the formation of CO₂  = -393.5 kj/mol

Now we will put the values in equation:

ΔH0reaction = [ΔHf0 CO2(g)] - [ΔHf0 CO(g) + ΔHf0 O2(g)]

ΔH0reaction = [-393.5 kj/mol] - [-110.5 kj/mol + 0]

ΔH0reaction = [-393.5 kj/mol] - [-110.5 kj/mol]

ΔH0reaction = -283 kj/mol

7 0
3 years ago
Examine the images.
gavmur [86]

Answer:

4 th image

Explanation:

water is being boiled n the 4th image indicating that the change between liquids and gasses is water vapor.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes a scientific law?
    15·2 answers
  • Two basketballs are sitting 1 m apart and are not moving. Which best explains why the gravitational force does not cause them to
    11·1 answer
  • Cherylanne mixes together Chemical A and Chemical B in a test tube, forming Chemical C. The mixture instantly turns cool to the
    11·2 answers
  • The environment with the greatest biodiversity is the one with the greatest variety of
    12·1 answer
  • What is the density of an unknown object with a mass of 225g and a volume of 500cm3
    6·1 answer
  • You begin pouring sodium chloride into a glass of water. For a long time, the sodium chloride just dissolves in the water, but s
    11·1 answer
  • . Deltas form mainly due to
    7·2 answers
  • Two solutions are mixed, bringing together ions of Na+, PO43−, V3+, and Cl−. Use the solubility rules to identify the compositio
    8·1 answer
  • What is the number of electrons in an atom of scandium
    12·1 answer
  • NEED HELP! SCIENCE HW IS DUE IN 1 HOUR!!!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!