A chemist requires 0.811 mol Na2CO3 for a reaction. How many grams does this correspond to?

what is the limiting reactant when 1.50g of lithium and 1.50 g of nitrogen combine to form lithium nitride, a component of advanced batteries, according to the following unbalanced equation?

Give the nuclear symbol for the isotope of phosphorus for which a=31? enter the nuclear symbol for the isotope (e. g., 42he).

How many moles of aqueous potassium ions and sulfate ions are formed when 67.3 g of K2SO4 dissolves in water? mol potassium ions? mol sulfate ions?

A substance that makes things taist sweeter

Which of the following is the most responsible force driving the water cycle? Gravity Elevation differences Energy from the Sun Flow of water over the ground

Every water molecule has two hydrogen atoms bonded at one oxygen atom. This fact supports the concept that elements in a compound are

What is the mass of 9 atom (s) of copper in grams?

Andy has two samples of liquids. Sample A has pH of 4, and sample B has a pH of 6. what can Andy conclude about these two samples? Sample A is a neutral b alkali c acidic Sample B is a neutral b alkali c acidic

How does a lone pair contribute to molecular shape? A. It is too small to affect the molecule's shape. B. It takes up space like an "invisible" atom. C. It forces the molecule into a tetrahedral shape. D. It lets the bonding pairs spread out more.

The are of a rectangle is 12 in^2. what is the area in cm^2. there are 2.54cm in an inch.