Which of these elements has two valence electrons? hydrogen (H) barium (Ba) nitrogen (N) krypton (Kr) bromine (Br)

If 20.0 g of copper (ii) chloride react with 20.0 g of sodium nitrate, what mass of sodium chloride is formed

Why is it important to note the temperature when determining the density of a substance?

A chemist requires 0.446 mol na2co3 for a reaction. how many grams does this correspond to?

What is the resulting formula unit when calcium and sulfur bond?

Is a match getting set on fire a chemical change?

Aluminum and Oxygen gas will react to form Aluminum Oxide (Al2O3). When the equation is balanced, How many moles of Al2O3 are formed when a mixture of 0.36 moles Al is ignited? a. 0.12 b. 0.18 c. 0.28 d. 0.46

Which state of the West produces the widest varieties of fruits, vegetables, and nuts? A) California B) Colorado C) Wyoming D) Alaska

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.

What type of Bond exist in a molecule of hydrogen Iodide

Which common material is an example of a polyamide?