How many atoms are in 2.56 g of Si?

Which of the following is a true statement about chloroplasts?

A car has a mass of 1,000kg and accelerates from rest (0 m/s) to a speed of 10.0 m/s in 10.0 seconds. What is the net force acting on the car

Sulfur trioxide, SO3 (g), reacts with water to form sulfuric acid, H2SO4 (g), a major component of volcanic smog. What is the balanced chemical equation for this reaction?

Which of the following is a property of a pure substance? It has distinct properties that are uniform. Its components can be separated with ease. It is made up of two or more types of compounds.

What are the 3 types of plate boundaries?

A neutral atom of beryllium (Be) has an average mass of 9 amu and 4 electrons. How many neutrons does it have? 13 9 5 4

Calculate the maximum mass of carbon dioxide that could be obtained by adding excess hydrochloric acid to 15 g of calcium carbonate.

True or false: during dry weather, the water level in a small pond drops because of runoff.

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?

An observation which requieres measuresment is called