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
harkovskaia [24]
3 years ago
15

A student did an experiment on the cycling of environmental gases. She placed water and bromthymol blue in each of four test tub

es. No other items were placed in tube 1. She placed a snail in tube 2, an aquatic(elodea) in tube 3 and both a snail and elodea in tube 4. Then she stoppered the tubes and placed them in bright light for 24 hours. The function of tube 1 in this experiment is to
1. Detect the presence of glucose

2. Determine the amount of gases in the water

3. Demonstrate the transparency of the solution

4. Serve as a control
Chemistry
1 answer:
boyakko [2]3 years ago
5 0
Numbers 2 is your answer
You might be interested in
When Sulphur dioxide reacts with water the product formed is
rosijanka [135]

Answer:

2 .Sulphurous acid

Explanation:

Sulphur dioxide can dissolve in water to form Sulfurous acid(H2SO3). sulphurous acid is weackly dibasic acid. sulphur dioxide is a major component of acid rain since it mixes with vapour in the atmosphere reacting to produce H2So4 .

7 0
3 years ago
Read 2 more answers
A ninja motorbike travelling at 55 m/s takes 10 sec to come to rest . What is its deceleration rate ?
9966 [12]

Answer:

Speed=Distance

Time

Explanation:

5 0
2 years ago
Read 2 more answers
If objects at the same distance suddenly decreased in mass the gravitational force between them would
Flauer [41]

Answer:

Gravitational force is also decreases.

Explanation:

Gravitational force is directly proportional to the mass of an object and inversely properly to the distance between their centres. Directly means if one increases the other automatically increases or if one decreases, the other also decreases. There is a direct relationship between mass and gravitational force so if mass of the bodies decrease, the gravitational force is also decreases.

7 0
3 years ago
The Gateway Arch in St. Louis, MO is approximately 630 ft tall. How many U.S. dimes would be in a stack of the same
miskamm [114]

Answer:

142240

Explanation:

We are told in the question:

Height of Gateway Arch in St. Louis, MO = 630ft

We are asked, how many U.S. dimes would be in a stack of the same

height when 1 dime is 1.35 mm thick.

Step 1

Convert height in ft to mm

1 ft = 304.8 mm

630ft =

Cross Multiply

630ft × 304.8mm/1ft

= 192024 mm.

Step 2

To find how many US dimes would be in a stack of the same height

= Total thickness/ Thickness of 1 US dime

= 192024 mm/1.35mm

= 142240

Therefore, the number of dimes that would be in a stack of the same

height is 142240

6 0
3 years ago
How do purple stem plants use there energy
tatuchka [14]
Purple stem plants can be formed by genetics, they use their energy slightly different from other plants, they use less energy, but that may also be because of bad nutrition, and because they may be hungry for nutrients.
5 0
2 years ago
Read 2 more answers
Other questions:
  • Sociologist Lewis Mumford said that language was the most important and significant ___________ humans used.
    5·1 answer
  • a boy pulls a wagon with a force of 6 N east as another boy pushes it with a force of 4 N east. what is the net force?
    9·2 answers
  • How many molecules of water are in 3.8 moles of water?
    5·2 answers
  • Identify this reaction <br> In pic
    10·1 answer
  • A compound that contains only carbon and hydrogen that produces carbon dioxide and water when burned is called?
    8·1 answer
  • Why are the discrete lines observed and not a continuous spectrum?​
    14·1 answer
  • Calculate the Molarity when 14.6 g Ethanol (C2H5OH) is dissolved in a 2.10 L solution.
    12·1 answer
  • Which is the correctly balanced chemical equation for the reaction of KOH and H₂SO4?
    5·2 answers
  • The group of atoms that is responsible for the characteristic properties of a family of organic compounds is called a/an _______
    5·1 answer
  • Which member of each pair is more soluble in diethyl ether? Why?<br> (a) NaCl(s) or HCl(g)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!