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
Gnom [1K]
3 years ago
9

Which of the following is an example of land used as a protected area

Chemistry
1 answer:
LenaWriter [7]3 years ago
8 0
I think the answer is A. Grand Canyon
You might be interested in
The student plans to conduct a spectrophotometric analysis to determine the concentration of Cu2+(aq) in a solution. The solutio
Lelechka [254]

Answer:

The wavelength the student should use is 700 nm.

Explanation:

Attached below you can find the diagram I found for this question elsewhere.

Because the idea is to minimize the interference of the Co⁺²(aq) species, we should <u>choose a wavelength in which its absorbance is minimum</u>.

At 400 nm Co⁺²(aq) shows no absorbance, however neither does Cu⁺²(aq). While at 700 nm Co⁺²(aq) shows no absorbance and Cu⁺²(aq) does.

6 0
3 years ago
Calculate the mass of nitric acid required to make a 250mL solution with 2.40 ph
meriva

The mass of nitric acid required to make the given solution is 0.0627 g.

The given parameters:

  • <em>Volume of the acid, V = 250 mL</em>
  • <em>pH of the acid, = 2.4</em>

The hydrogen ion (H⁺) concentration of the nitric acid is calculated as follows;

H^+ = 10^{-pH}\\\\H^+ = 10^{-2.4}\\\\H^+ = 0.00398

The molarity of the nitric acid is calculated as follows;

=  0.00398 \ H^+ \times \frac{1 \ M \ HNO_3}{1 \ H^+} \\\\= 0.00398 \ M

The number of moles of the nitric acid is calculated as follows;

moles = M\times L\\\\moles = 0.00398\ M \ \times \ \frac{250 \ mL}{1000} \\\\moles = 9.95 \times 10^{-4} \ mol.

The molar mass of nitric acid is calculated as;

HNO_3 = (1) \ + (14) \ + (16 \times 3) = 63 \ g/mol

The mass of the nitric acid contained in the calculated number of moles is calculated as;

mass = moles\  \times \ molar \ mass\\\\mass = 9.95\times 10^{-4} \ mol. \ \times \ 63 \ g/mol\\\\mass = 0.0627 \ g

Thus, the mass of nitric acid required to make the given solution is 0.0627 g.

Learn more about molarity of acids here: brainly.com/question/13864682

3 0
2 years ago
Which of the following lists elements from lowest to highest atomic number
vitfil [10]
Lowest is Hydrogen highest is <span>Beryllium
-HOPE THIS HELPED </span>
8 0
3 years ago
In the food chain what might happen if all the frogs suddenly died off?
il63 [147K]
The food chain will crash.
7 0
3 years ago
Read 2 more answers
If sodium is burned in chlorine gas, a compound is formed that dissolves in water. What colour will the solution be?
Alchen [17]

If sodium is burned in chlorine fuel, a compound is formed that dissolves in water. the solution be: Bright yellow mild

Chlorine is a yellow-green gas at room temperature. Chlorine has a smelly, annoying scent similar to bleach that is detectable at low concentrations. The density of chlorine gasoline is about 2.5 times extra than air, so one can reason it to initially stay near the floor in regions with little air movement.

Chlorine gasoline can be recognized by using its smelly, anxious smell, which is like the scent of bleach. The sturdy scent may additionally provide a good enough caution to human beings that they have been uncovered. Chlorine fuel appears to be yellow-green in color. Concentrations of approximately 400 ppm and past are commonly fatal over a half-hour, and at 1,000 ppm and above, fatality ensues within only some mins. A spectrum of scientific findings can be present in those uncovered to excessive tiers of chlorine.

Learn more about Chlorine here:

brainly.com/question/25190915

#SPJ1

6 0
10 months ago
Other questions:
  • A coordination complex is made up of _________________________________________. (Choose one) Selected Answer: IncorrectC. a tran
    8·1 answer
  • A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?
    16·1 answer
  • Chocolate drink can easily be dissolved in<br>​
    15·1 answer
  • Which of the following is correctly abbreviated SI unit describing the mass of an object?
    13·2 answers
  • Eva buys a package of food, and the nutrition label says that one serving is equal to 36 grams and has 110 Calories. However, th
    7·1 answer
  • What should i put in the box answer for brainliest
    12·2 answers
  • Can some one help me in this I hope this will be easy for you :)
    7·1 answer
  • When determining the density of a grape, a student was not careful when putting the grape into the graduated cylinder, and some
    15·1 answer
  • 9. Identify which properties of each of the following elements make them ideal for their uses. KIU A (a) copper and aluminum for
    8·1 answer
  • Help i dont get it
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!