As a star gives off energy in a thermonuclear reaction, the mass of the star

1.

decreases

2.

increases

3.

remains the same

what volume of air at 1 atm would have to be put into a car tire with a volume of 15 L if the pressure in the car tire is to be 30 psi

3 Pieces of Key Information elements, compounds, mixtures also state a real world example of elements, compounds, mixtures and lastly why is elements, compounds, mixtures are important

Which of the molecules listed below directly donates a nitrogen atom for the formation of urea during the urea cycle?

The coefficients in a chemical equation represent the

A cheetah ran 75 meters at a speed of 25 meters per second. How long was the cheetah running? 3 seconds 5 seconds 30 seconds 50 seconds

An apple is placed on a scale. the scale shows that the apple weighs 1/4 a pound. this demonstrates that the apple has A: Atoms. B: Elements. C: Vitamins. D: Weight.

Identify Cobalt sulfride

If the reactants have a potential energy of 10.2 kJ/mol and the products have a potential energy of 15.7 kJ/mol, what is AH?

How to solve determine the final temperature when 450.2 grams of aluminum at 95.2°c is placed in an insulated calorimeter with 60.0 grams of water at 10.0°c?

Which of the following is true about a scientific hypothesis? A. The hypothesis must form a scientific theory. B. The hypothesis must be testable. C. The hypothesis must predict the outcome of the experiment. D.