How have chemists changed the periodic table over time?

Apex

Based on the chart, determine the identity of a substance that increases in temperature by 11.4oC when 1250J of energy are added to a 55g sample. Substance Specific Heat (J/g oC) Lithium 3.56 Vegetable Oil 1.99 Air 1.02 Iron 0.444 Sand 0.290 Gold 0.

A volume of gas occupies 3.2 L at 2.8 kPa. What would the pressure be if the same volume of gas now occupied 8.1 L?

5. A molecule of carbon monoxide, CO, has one atom of oxygen while a molecule of carbon dioxide, CO2, has two. In a sample of CO containing 1 g of carbon, 1.33 g of oxygen will combine with the carbon to form the molecule.

The compound trimethylamine, (CH3) 3N, is a weak base when dissolved in water. Write the Kb expression for the weak base equilibrium that occurs in an aqueous solution of trimethylamine: Kb

Compare the type of bonds in metalloids to metal (delocalized) and nonmetal (localized).

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?