A substance contains 36.1 percent calcium and 63.9 percent chlorine by weight. What is the empirical formula of the given compound?

A.

CaCl

B.

Ca0.9Cl1.8

C.

CaCl2

D.

Ca2Cl4

A japanese sword maker heats a mixture of iron and charcoal. he repeatedly heats, folds and flattens the mixture more than a thousand time. what is he doing

Why does an oil-and-vinegar salad dressing have two separate layers?

In the term trace element, the word trace means that ___A. the element improves health but is not essential for the organism's long-term survival. B. the element can be used as a label to trace atoms through an organism's metabolism. C.

How many metric tons of calcium sulfate would be produced from each metric ton of so2 that is trapped?

Can an object move by itself explain the answer

Indicate which reactions are redox reactions. check all that apply. check all that apply. 2na (s) + cl2 (g) →2nacl (s) cd (s) + pb2 + (aq) →cd2 + (aq) + pb (s) pb (no3) 2 (aq) + 2licl (aq) →pbcl2 (s) + 2lino3 (aq) c (s) + o2 (g) →co2 (g)

If the mass of a material is 119 grams and the volume of the material is 20 cm3, what would the density of the material be?

There are some exceptions to the trends of first and successive ionization energies. For each of the following pairs, explain which ionization energy would be higher: (a) IE₁ of Ga or IE₁ of Ge (b) IE₂ of Ga or IE₂ of Ge (c) IE₃ of Ga or IE₃ of Ge

Bases in solution produce what type of ions? a. sulfide ions b. chloride ions c. hydroxide ions d. hydronium ions

How many earth minutes are represented by 0.1 martian sol