The reaction of solid silicon (Si) with gaseous oxygen can be used to produce silicon trioxide. How many grams of silicon trioxide are produced in the reaction when 4.25 g of silicon reacts with 3.75 g of oxygen gas?    2Si (s) + 3O2 (g)

The following image shows interactions between molecules of ethylamines (CH3CH2NH2). From the image identify the hydrogen bonds.

Which of the following statement(s) is/are correct?  S is the symbol for sodium Au is the symbol for gold O is the symbol for oxygen 

The following image shows interactions between molecules of ethylamines (CH3CH2NH2). From the image identify the hydrogen bonds. 

Which of the following statement(s) is/are correct?    Au is the symbol for gold  Po is the symbol for potassium C is the symbol for carbon 

Determine the amount of heat released (in kilojoules) when 12.20 grams of ethane, C2H6, undergoes combustion according to the following equation: 2C2H6 (g) + 7O2 (g)

Which of these ions has the largest radius (O2-, F-, Na+, or Mg2+)?

Which of the following statement(s) is/are correct?   Ag is the symbol for silver H is the symbol for hydrogen S is the symbol for sodium 

Using the data below on successive ionization energies, determine what the element could be?    Number of Electrons Removed  Ionization Energies (kJ/mol)   1  600  2  1200  3  3000  4  12,000  5  13,000  6  14,500  7  15,600 

Which of these ions has the largest radius (Se2-, Br-, Rb+, or Sr2+ )?