In 1928, 47.5 g of a new element was isolated from 660 kg of the ore molybdenite. the percent by mass of this element in the ore was:

What is the correct name for CH4? A) Carbon tetrahydride B) Carbon (IV) hydride C) Monocarbon tetrahydride D) Monocarbon hydroxide

A solid that form from liquid in a chemical reaction is called

In a solid the particles are packed closely together, but they can move past each other freely. a. True b. False

What is the value of the rate constant for a second order reaction if the reactant conceretation drop sform 0.657 M to 0.0981 M in 17.0 s?

Which fossil fuel creates the least amount of pollution when it is burned? A. bituminous coal B. petroleum C. natural gas D. anthracite

What are groups 1, 2, and 3 examples of on a periodic table of elements? A) Metals B) Nonmetals C) Metalloids D) Noble gass

What is the complete balanced equation for the reaction that occurs when lithium carbonate (Li2CO3) is heated?

Which statement best compares coastal ecosystems to open ocean ecosystems? Coastal ecosystems include abyssopelagic depths, and open ocean ecosystems do not.

If you are given a 1.0 L (1000mL) of an unknown liquid which has the mass of 500 grams it is most likely which of the above substances? Show work to back up your answer. Distilled water density 1.0 g/cm^3 propane density 0.

When 3.05 moles of ch4 are mixed with 5.03 moles of 02 the limiting reactant is?