A sample of nitrogen gas, occupies a volume of 400ml at 2 atm pressure. What pressure must be applied to compare the gas to a volume of 200ml at constant temperature and fixed amount of gas

Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, and which sink? density of styrofoam: 0.005 density of gold ring: 19.32 density of oak: 0.70

Which of the following is NOT an example of a physical change? a. the shaping of a gold bar b. the explosion of fireworks c. the melting of a Popsicle d. the sanding of a piece of wood

What tells you how much potential energy is in still water?

The prefix 'kilo-' means a thousand. So a kilo-gram is a thousand grams. 1 kilogram = 1,000 grams. How many kilograms is 831 grams? Round your answer to the nearest tenth of a kilogram.

How many moles are present in 0.23 kg of SO2

Which of the following is diamagnetic? A) Sn B) Pb 2+ C) I D) N E) All are paramagnetic

Based on your observations in the lab, what do you think happens to the majority of water (not, ice) at the poles? at the equator?

How do organisms interact with each other and how can one organism be dependent upon other species

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission

Which of these is the main goal of any titration? to observe the effect of indicators on acids to observe the effect of indicators on bases --> (((to determine the concentration of one of the reactants))) <--- to determine the effects of a base on