Which of the following is the best example of an isolated system?

A. A bus at a bus station

B. An astronaut in a spaceship

C. A motorcycle in a garage

D. A car on the freeway

Choose the correct word that describes the description. If you add too much sugar to the water, some of the crystals will sit on the bottom of the container because the solution is unsaturated? dilute? solution? saturated?

Compute 6.28x10 ^13+7.30x10^11 answer three digits.

Radioactivity is caused by the decay of the nucleus which occurs when unstable nuclei lose protons and neutrons.

Determine the empirical and molecular formulas of a compound that contains 56.36% o and 43.64% p and has a molar mass of 284 g/mo

How many iron atoms are there in 2.50moles of each of the following? FeWO4?

Which pair of elements are the most different

A gas held at constant volume is heated from - 5 ºC to 50 ºC, if the initial pressure is 1.0 atm, what is the new pressure the gas exerts?

Unknown element x is a metal that ionically bonds to sulfur. is the formula, x3s feasible? why or why not? a) it is feasible. the three metallic ions each receive an electron from sulfur. b) no, it is not feasible.

What is the difference between a period and a group on the periodic table

Oil flows upward in the wick of a lantern because of the liquid property called A. density. B. meniscusity. C. viscosity. D. capillarity.