Los elementos artificiales son extraido de la naturaleza en su mayoria?

When 2.94 g of a metal combined with fluorine gas, 7.47 g of a metal fluoride formed. Given this information, calculate the mass %F in the metal fluoride that formed.

Sodium hydroxide dissolves in water according to the equation below. if the original temperature of the solution is 50°c, which might be the temperature after a period of time? naoh (s) → naoh (aq) δh = - 445.1 kj. mol

Water-soluble vitamins: a. often result in toxicities b. are easily excreted in the urine c. are stored in body tissues to a large extent d. are soluble in body fluids but insoluble in cooking water e. are not damaged by heat or oxygen exposure

What is the PH of a 0.05M solution of the strong base Ca (OH) 2 at 25C

What is the concentration of agcl in an aqueous solution that contains 1.2 x 10 - 3 gram of agcl in 800. grams of the solution?

Which statement best describes a bacterial cell? A It contains more than one cell. B It is a complete organism. C It is part of a larger organism. D It contains different kinds of cells

Lithium (Li) and oxygen (O) are both in period 2. They both have? a. similar properties b. the same number of protons c. two electron shells d. the same number of electrons

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false