What do trees and plants provide us with

495 cm3 of oxygen gas and 877 cm3 of nitrogen gas, both at 25.0 C and 114.7 kpa, are injected into an evacuated 536 cm3 flask. Find the total pressure in the flask, assuming the temperature remains constant.

There are two steps in the extraction of copper metal from chalcocite, a copper ore. in the first step, copper (i) sulfide and oxygen react to form copper (i) oxide and sulfur dioxide: (s) (g) (s) (g) in the second step, copper (i) oxide and carbon

Which correctly lists the types of matter, in terms of their atoms, in order from least tightly packed to most tightly packed? A. solid, gas, liquid B. solid, liquid, gas C. gas, solid, liquid D. gas, liquid, solid

What is the half-life of an isotope if 125 g of a 500 g sample of the isotope remains after 3.0 years? a.) 3.5 years b.) 4.5 years c.) 1.5 years d.) 2.5 years

What statement is true about the eight elements on the periodic table termed metalloids? A. They are the only man-made elements. B. They have properties of both metals and nonmetals. C. They are the only naturally occurring elements. D.

Most mutagens have what kind of an effect on an organism?

According to the hess's law, the enthalpy of solution is: δhsoln = δhsolute + δhsolvent + δhmix. considering dissolving a small drop of nonpolar pentane oil in water which term (s) in the equation will experience the largest enthalpy change.

Solve for x: ln x = 0.863. Report your answer to 3 significant figures.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means: