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Alex787 [66]
3 years ago
13

Plz help me find # 1 and 2. Thanks

Chemistry
1 answer:
Andreyy893 years ago
5 0
1. The independent variable is the activities that the athletes are doing. An independent variable is what changes in an experiment so that's why it's the different activities.
2. The dependent variable is the rate of oxygen consumption. A dependent variable is something that is measured, which is what they're trying to do in the experiment. They want to know if certain activities affect the oxygen consumption that the athletes are receiving.
Hope this helped!
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Mrs. Nogaki tested four black markers in rubbing alcohol and in water. Each filter paper had four evenly spaced dots. She found
ExtremeBDS [4]

Answer:

Lost pigment of marker when dipped in alcohol

Explanation:

dependent viable = output

so it's the output of what happens after the input.

  • she put the marker in the water which is the independent variable, that's the input
  • the output or the result of that decision is having lost pigment in the marker

8 0
3 years ago
Your lab partner accidentally spills some acid on his wrist and watchband. You should: (Check all that apply.)
nordsb [41]

Answer: Remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. Let the TA inspect his wrist to see if it is okay.

Explanation:

The question is incomplete, the choices are:

a. Take him to the safety shower, and make sure he stands under it for at least 15 minutes to be sure all hazardous material has been washed away. b. Remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. c. Let the TA inspect his wrist to see if it is okay.

d. Rinse the watch band before allowing him to put it back on.

An acid is traditionally considered to be any chemical compound that, when dissolved in water, produces a solution with greater hydronium cation activity than pure water, i.e., a pH less than 7. Both corrosive acids (and also corrosive bases) <u>are capable of destroying skin</u> by catalyzing the hydrolysis of fats, which are chemically esters. Also, when acids attack metals, hydrogen gas is often released.

This is why your lab partner should remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. This ensures that the acid is can not damage the skin. And also the person should make sure that someone qualified checks it to see if it is okay.

7 0
4 years ago
When the vapor pressure is greater than the atmospheric pressure, what will occur?
Bad White [126]

Answer:

Evaporation wll occur

Explanation:

Boiling point is reached when the vapor pressure equals the atmospheric pressure around. The vapor pressure is the pressure exerted by a gas which is in contact with its own solution or liquid. It increases with increasing temperature.

The atmospheric pressure is the pressure of the atmosphere around. When the vapor pressure exceeds atmospheric pressure, boiling point is reached and surpassed. At this point, evaporation will occur.

4 0
3 years ago
Read 2 more answers
A mixture of N2, O2 and He have mole fractions of 0.25, 0.65, and 0.10, respectively. What is the pressure of N2 if the total pr
VladimirAG [237]

Answer:

Partia pressure N₂ → 0.975 atm

Explanation:

Let's analyse the moles fractions:

N₂ → 0.25

O₂ → 0.65

He → 0.1

Partial pressure / Total pressure = Mole fraction

Partial pressure N₂ / 3.9 atm = Mole fraction N₂

Partial pressure N₂ / 3.9 atm = 0.25

Partial pressure N₂ = 3.9 atm . 0.25 → 0.975 atm

5 0
3 years ago
For a certain chemical reaction, the standard Gibbs free energy of reaction at 10.0 °C is 149. kJ. Calculate the equilibrium con
leonid [27]

Answer:

This is confusing

Explanation:

8 0
4 years ago
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