how many grams of solid lithium must be added to liquid after in order to obtain 15.0 L of hydrogen gas at STP?

Whats a chemical change

Elvis flew his jet 2100 miles at an average speed of 350 mph how long did Elvis trip take

An element x is found to have a mass number of 31 and atomic number of 17. idenrify the group and the period to which it belongs?

A chloride of silicon contains 79.1 mass % cl. (a) what is the empirical formula of the chloride?

Write the formula unit equation for this reaction occurring in water: Potassium sulfate and barium chloride are mixed to form potassium chloride and barium sulfate. 1. K2SO4 (s) + BaCl2 (s) → 2 KCl (aq) + BaSO4 (s) 2.

Which best describes the relationship between solute, solvent and solution? 1. A solution and solute combine to form a solvent 2. A solute is dissolved in a solvent to form a solution 3. A solvent is dissolved in a solute to form a solution 4.

A watermelon weighing 10 newtons is lifted 2 meters. How much work is done?

If an atom donates or accepts an electron, what is it considered

In this experiment, you will measure mass and volume of various sport balls, both regularly shaped ball and irregularly shaped.

An atom that has a negative four charge will have one of the following? A. 4 more protons than electrons B. An equal amount of protons and electrons C. 4 more electrons than protons D. 2 more neutrons than protons