Which of the following is a way earths water is directly affected by pollution

emissions from cars

toxic run off farms

dumping trash on the road side

production of oxygen by trees

A metal sample has a mass of 64.2 g. What is the density of this metal?

How many particles would be found in a 89.2 g sample of Na?

How is friction involved in sledding and skiing?

Suppose you are working with a NaOH stock solution but you need a solution with a lower concentration for your experiment. Calculate the volume of the 1.224 M stock NaOH solution needed to prepare 250.0 mL of 0.1281 M dilute NaOH solution.

Which atom has the weakest attraction for electrons in a chemical bond? (1) a boron atom (3) a fluorine atom (2) a calcium atom (4) a nitrogen atom

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?

Which of the following is easist to accelerate? A. bowling ball B. tennis ball C. golf ball D. ping pong ball

Fish need at least 4 ppm dissolved o2 for survival. part a what is this concentration in mol/l?