Marcel just purchased 1.69 grams of iron fillings in order to make Living Putty for his 6 year old niece. How many moles of iron are made in his sample?

Can ultraviolet rays be felt by your skin but can not be seen by your eyes? If not then what is it

What is the bond angle of a trigonal planar molecule, such as boron trifluoride (BF3) ?

What does it mean if an element has no subscript in a chemical formula?

2h3po4 + 3mg (oh) 2 → mg3 (po4) 2 + 6h2o phosphoric acid, h3po4, is neutralized by magnesium hydroxide, mg (oh) 2, according to the equation shown. how many moles of water will be produced from the neutralization of 0.24 mole of h3po4? 0.72 mol 0.

Which of the following statements best describes the energy transformation that occurs when a log burns? Mechanical energy changes to heat and light energy. Chemical energy changes to heat and light energy.

Decomposition reaction of Ag3N

Name three types of particles found in an atom and explain how they differ

Which impurity can bioaccumulate in aquatic systems? A. Mercury B. Sulfur C. Carbon Dioxide D. Methane

What is the element K2SO4 and is it ionic, covalent or polyatomic

The elements in a star can be determined by analyzing the star's spectrum. Which statement explains why no two elements have the same spectrum? A. Each element has a unique arrangement of electrons. B.