If a sample contains 21.2 g N, how many moles of N does it contain?

0.66 mol

1.51 mol

14.01 mol

297.01 mol

In a given chemical reaction the energy of products is great than the energy of the reactants which statement is true?

barium chloride (Ba (CIO3) 2) breaks down to form barium chloride and oxygen. what is the balanced equation for this equation?

Which of the following elements is a metalloid? A. gold B. sulfur C. silicon D. aluminum

The minerals are sorted into two groups. Which property are they sorted by? A. color B. hardness C. luster D. shape

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ

Which two bases pair with each other?

What is the main cause of increased erosion

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).