What is the volume of 3.89 grams of helium gas?

A runner has a mass of 75 kg and a speed of 10 m/s. What is her kinetic energy? (KE = 1/2mv2)

When dissolving a gas, as the temperature of a solvent increases, the rate of dissolution A. increases. B. decreases. C. stays the same. D. either increases or decreases, depending upon the liquid.

The density of h2 gas in a rigid container is 0.135 g/l at a given temperature. what is the pressure of hydrogen in the flask if it is heated to 201 °c?

A liquid with a greater viscosity is always denser than a liquid with a lesser viscosity. True or False?

Perform the following calculations. Express the answers with the correct number of significant figures. a) 7 g - 3.5 g - 2.75 g = b) 200.00 kg - 199.0 kg = c) 25 L - 3.0 L = d) 0.67 cm + 2.0 cm + 0.090 cm = e) 104.5 g + 0.40 g =

Which compound is sometimes found in fire extinguishers

The volume coefficient of thermal expansion for gasoline is 950 * 10-6 K-1. By how many cubic centimeters does the volume of 1.00 L of gasoline change when the temperature rises from 30°C to 50°C?

An element's most stable ion forms an ionic compound with bromine, having the formula XBr. If the ion of element X has a mass number of 85 and has 36 electrons, what is the identity of the element?

How many molecules are in 3 moles of Fe2O3?

What terms are needed to completely describe velocity ... A. units B. number C. mass D. direction