Student mixes 5 g of sand into a beaker of 20 g of water. Is this a physical or chemical change-why?

True or false treams of water called ocean currents move warm or cold water, warming or cooling the nearby land.

The blank is the material that wave move through

A rock has a mass of 13.0 g and displaces a volume of 3.9 mL of water in a graduate cylinder. What is the density of the rock? (write your number to 2 places after the decimal)

Sulfur dioxide gas (SO2) and oxygen gas (O2) react to form the liquid product of sulfur trioxide (SO3). How much sulfur dioxide would you need to completely react with 6.00 g O2 such that all reactants could be consumed?

The C-O stretching frequency of carbon monoxide changes when the molecule coordinates to a metal centre. Does it increase or decrease? Explain

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.