Matter is classified as a

(1) substance, only

(2) substance or as a mixture of substances

(3) homogenous mixture, only

(4) homogenous mixture or as a heterogeneous mixture

Calculate the mass percent composition of lithium in Li3PO4. A) 26.75 % B) 17.98 % C) 30.72 % D) 55.27 % E) 20.82 %

Which statement is true for balanced chemical equations?

Sulfur does not dissolve in water but it does dissolve in carbon disulfide

Which products would result from the double replacement reaction between mgcl2 (aq) and na2co3 (aq) ?

What are the symbol, name, and atomic number of the element that has 21 protons in the nuclei of its atoms?

Organic compounds ALL contain the element carbon. Which organic compound, used for stored chemical energy, contains carbon, hydrogen, oxygen, and often phosphorous?

In a polar molecule, which atom will have the greatest partial negative charge? A) the smallest atom B) the least electronegative atom C) the largest atom D) the most electronegative atom

Why is portion control important

Which ionic compound is the most likely to dissolve in water? CaSO4 Na2SO4 BaSO4 SrSO4

Calcium (atomic number 20) has electron configuration 1s2,2s2,2p6,3s2,3p6,4s2. The atomic number of scandium is 21. Which orbital does the 21st electron enter? a. 3d b. 4p c. 4d d. 4f