The salts in the sea come from

A) weathering and erosion of rocks.

B) acid rain.

C) particles falling from space.

D) organisms that live in the sea.

Five gases combined in a gas cylinder have the following partial pressures: 3.00 atm (N2), 1.80 atm (O2), 0.29 atm (Ar), 0.18 atm (He), and 0.10 atm (H). What is the total pressure that is exerted by the gases? Use

An atom changes its oxidation number from + 3 to - 1. Is it oxidized, reduced, or neither?

Which is the correct Lewis structure for hydrogen peroxide, H2O2

The mole in 196.5 g of Zn (NO3) 2

Wind is related to the movement of warm and cold air masses. Which kind of heat transfer does this represent? A: radiation B: conduction C: conduction D: absorption

Suppose that you have 23 g of silver. Also assume that this sample of silver is initially at 18 oC. What is the final temperature of this sample of silver after it absorbs 2.05 kJ of heat? csilver = 0.

The number of neutrons in the nucleus of an atom can be determined by (1) adding the atomic number to the mass number (2) subtracting the atomic number from the mass number (3) adding the mass number to the atomic mass (4) subtracting the mass

Trisha and her lab partner filled a beaker with 150 milliliters of a 0.10 M HCl solution. How many moles of HCl are in the beaker? Remember, molarity = moles liter.

Why is the correct name of compound Silicon Pentoxide and NOT Silicon Pentoxide?

10. The density of aluminum is 2.7 g/cm². A 27g piece of aluminum will have what volume?