Which of the following elements has the electron configuration of 3s23p4 in its valence shell?

An iron ore sample is found to be 35.00% Fe by mass. How many grams of ore are needed to obtain 454.0 g of Fe?

Suppose it took 108 joules of energy to raise a bar of gold from 25.0°C to 29.7°C. Given that the specific heat capacity of gold is 0.128 J/g∙°C, what is the mass (in grams) of the bar of gold?

A 7.96 gram sample of silver reacts with oxygen to form 8.55 gram of the metal oxide. What is the empirical formula of this metal oxide?

A plastic block has dimensions of 2.2 cm × 3.0 cm × 1.5 cm and a mass of 12.4 grams. Will the block float in water and why?

A fictional element named nivadium is found to have three naturally occurring isotopes with the natural abundances shown here: MASS (amu) ABUNDANCE   22.1760   45.00%   23.1847   45.00%   24.1934   10.00% The calculated atomic mass of Nivadium is:

The common English unit in which the speed of an automobile is expressed is miles/hr. What is the set of base SI units for speed?

When 49.5 J of heat was transferred to 7.30 g iron at 22°C, the temperature of iron increases to 37°C. What is the specific heat of iron in J/g∙°C?

When methane is burned with oxygen, the products are carbon dioxide and water. If 36 grams of water and 44 grams of carbon dioxide were produced from 16 grams of methane, determine how many grams of oxygen were needed for the reaction?

Match each temperature.