What is formed when atoms of different elements are combined chemically?

What is the salt that is produced when ammonia (NH3) and hydrochloric acid (HCl) react together? NCl NH4 + NH4Cl NH2Cl

Find ΔH for: BaCO3 (s) → BaO (s) + CO2 (g) given 2 Ba (s) + O2 (g) → 2 BaO (s) ΔH = - 1107.0 kJ Ba (s) + CO2 (g) + ½ O2 (g) → BaCO3 (s) ΔH = - 822.5 kJ

Examples of chemical changes in nature

List 4 types of information that are given in each box of the periodic table:

Given 6.0 mol of N2 are mixed with 12.0 mol of H2. Equation: N2 + 3H2--> 2NH3 Which chemical is in excess? What is the excess in moles? Theoretically, how many moles of NH3 will be produced?

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.