What does pressure measure

A. The temperature of a substance

B. The number of molecules present

C. The force of colliding particles

D. The volume occupied by particles

Noble gases have zero electron activity, why?

The most abundant element in the Sun is.

A person's heartbeat is 91 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.

What is the mass of 1.00 mol of sodium hydrogen carbonate?

Which expression could represent the concentration of a solution? A) 3.5 g B) 3.5 M C) 3.5 mL D) 3.5 mol

How does the shape of the Earth affect the climate of different regions?

What is Delta. Gsystem for the system that is described by the following data? Delta. Hsystem = - 345 kJ, T = 293 K, Delta. Ssystem = 465 J/K Delta. Gsystem = Delta. Hsystem - TDelta. Ssystem - 481 kJ - 209 kJ 413 kJ 135,900 kJ

Calculate ΔGrxn for this equation, rounding your answer to the nearest whole number. CaCO3 (s) → CaO (s) + CO2 (g) ΔGf, CaCO3 = - 1,128.76 kJ/mol ΔGf, CaO = - 604.17 kJ/mol ΔGf, CO2 = - 394.4 kJ/mol

Using two spring scales, students pull on opposite sides of a dynamic cart at rest. 5 Newtons of force is pulling left and 5 newtons force is pulling right. Describe the motion of the cart? A) The cart will move to the right.

If a mineral has a metallic shine to it, which property of a mineral is being measured