The molecular weight of calcium carbonate, CaCO3, is 100.09 3.

mol

How many moles of calcium carbonate are in 63.8 g of calcium carbonate?

Express the answer using 3 significant figures.

What is the correct noble gas configuration for magnesium? a) Ne [3s2 b) [Ar] 3s2 c) [Ne] 3s23p2 d) [He] 2s2

What does Earth's hydrosphere include? the water on Earth the hard outer part of Earth the layer of gases surrounding Earth the living things on Earth

When an atom of chlorine forms an ionic bond with an atom of sodium the atom of chlorine does what?

If someone told you they had a career in either ecology, paleontology, or botany, what area of science is this?

Explain what happens to energy and matter during a chemical reaction. Be sure to use complete sentences.

When you measure something in meters cubed, you are measuring

Low density: low pressure: high density Is which. evaporation? water vapor? condensation / liquid water

Which structures are found on sponges? pores medusae polyps stinging cells

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?