The atomic number of lithium, the first element in group 1, is 3. the atomic number of the second element in this group is

How many nitrogen and hydrogen atoms are in these two molecules of ammonia? 2NH3 A. 2 nitrogen and 5 hydrogen B. 2 nitrogen and 6 hydrogen C. 6 nitrogen and 6 hydrogen D. 2 nitrogen and 3 hydrogen

Write the formula equation for the following reaction. Ammonia reacts with hydrogen chloride to form ammonium chloride.

Which statement describes a catalys

What is the electrical charge of an atom that has lost an electron? A.) negative B.) zero C.) positive D.) neutral

Which of the following is an acid-base neutralization reaction? NaOH + HCl yields NaCl + H2O 2NaCl + H2SO4 yields Na2 SO4 + 2HCl C6H12O6 + 6O2 yields 6CO2 + 6H2O 2H2 + O2 yields 2H2O

What was venter's comtributionto science?

How many atoms are in 151 g of calcium?

Which statements about the formation of the solar system are true and in a correct order? A. A black hole collapsed to form the sun; small planetary objects formed; small planetary objects collided with each other to form larger objects. B.

Which is an important step in the alternate method for balancing equations in redox reactions? a) indicating the types of bonds found in the molecules. b) determining the speed at which reactions take place.

How many moles of NH3 can be produced from 24.0 mol of H2 and excess N2