A sample of gold (Au) has a mass of 35.12 g. Calculate the number of moles of gold (Au) in the sample and record in.

A sample of silver (with work function φ = 4.52 ev) is exposed to an ultraviolet light source (λ = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if:

Does the temperature of water affect how fast salt dissolves

What force in Newtons is needed to accelerate a 40 kg mass across a surface at 7.5 m/sec²?

The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol (CH3OH) and hydrochloric acid (HCl) is 3.32 * 10-10 s-1 at 25°C. Calculate the rate constant at 48.5°C if the activation energy is 116 kJ/mol.

A chemist dissolves 327. mg of pure hydrochloric acid in enough water to make up 120. mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant dig

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.