An unknown mass of water absorbed 23,000J of energy as the temperature increased from 10°C to 60°C . What is the mass of the water?
192 g
460 g
110 g

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

What type of matter is made of only one kind of atom