How many atoms are in 0.230grams Pb

A sealed, rigid l. 0-liter cylinder contains He gas at STP. An identical sealed cylinder contains Ne gas at STP. These two cylinders contain the same number of (1) atoms (2) electrons (3) ions (4) protons

Meteorologists use weather balloons to carry weather instruments high into the atmosphere. When it is first released at Earth's surface, a weather balloon typically appears underinflated.

Which particle is responsible for triggering a nuclear reaction?

Five calcite, CaCO3 (MM 100.085 g/mol), samples of equal mass have a total mass of 12.2±0.1 g. What is the average mass and absolute uncertainty of calcium in each sample?

The shape of a molecule is trigonal planar. How many electron domains around the central atom does this molecule most likely have? zero two three four

What will be the outcome of putting litmus paper into bleach? a. red paper turns blue, blue paper turns red b. red paper does not change, blue paper turns red c. red paper turns blue, blue paper does not change d.

What makes it possible for ships to float?

How many moles of water will be produced when 3 moles of ethane are burned

What is an exothermic chemical reaction? a. It is a reaction that converts matter to heat. b. It is a reaction that requires heat to proceed. c. It is a reaction that draws heat from its surroundings. d.

Chemical equation for liquid ethyltoluene