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Miya Compton
ChemistryChemistry
Determine the number of moles 1) 20g Na and 2) 34g H2O
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Tianna
ChemistryChemistry
Nitrogen dioxide (NO2) gas and liquid water (H2O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO) gas. Suppose you have 5.0 mol of

NO2 and 11.0 mol of H2O in a reactor.

Suppose as much as possible of the NO2 reacts. How much will be left? Round your answer to the nearest 0.1 mol.
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Malia Gillespie
ChemistryChemistry
How long does it take the Earth to rotation and revive
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Hope Davila
ChemistryChemistry
What is Charles' law formula?
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Morse
ChemistryChemistry
Which stars have the highest absolute brightness?

Select one:

a. Supergiants

b. Giants

c. Yellow stars

d. Dwarfs
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Misael Huff
ChemistryChemistry
What volume would 3.01•1023 molecules of oxygen gas occupy at STP?
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Reina Barnett
ChemistryChemistry
In most food webs there are many producers, fewer herbivores, and even fewer carnivores. Which statement best explains why there are always fewer carnivores than producers in a food web?

A. There is not enough space to illustrate them.

B. Each successive trophic level has less available energy for the organisms at that level.

C. An energy pyramid indicates how efficiently carnivores use energy obtained from producers.

D. Food webs do not show the energy that carnivores obtain elsewhere in the environment.
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Aiyana Wilkerson
ChemistryChemistry
Which of Deeandra observation is scientifically testable
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Martha Santiago
ChemistryChemistry
A round, three dimensional object is a?
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Briley Levy
ChemistryChemistry
The energy needed to start a chemical reaction is called
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Skippy
ChemistryChemistry
How does the motion of particles in the sun's plasma compare to the motion of particles in a solid?

particles in both the plasma and a solid move around to fill available space.

Particles in the plasma move randomly, but particles in a solid vibrate in one place.

Particles in the plasma have low kinetic energy, but particles in a solid have high kinetic energy.

Particles in both the plasma and a solid are made up of fast-moving electrons and cations.
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Nataly Lin
ChemistryChemistry
What is the molarity of a solution containing 45.78gMgCl2 dissolved in 3.00L of solution?
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Darian Olson
ChemistryChemistry
What kind of wavelength do television signals have?

a. Short

c. Long

b. Intermediate

d. Very rapid
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Esperanza Hernandez
ChemistryChemistry
What gene is responsible for tumor suppression?

A. beta - galactoside

B. p53

C. alpha goblin

D. beta goblin
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Harley George
ChemistryChemistry
How does ur body maintain constant tempature on a hot day?
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