What are 5 most abundant elements in the Earth's crust

A compound is found to contain 15.94 % boron and 84.06 % fluorine by mass. To answer the question, enter the elements in the order presented above. Question 1: the empirical formula for this compound is.

Which description is not a property of an acid? A turns litmus paper red B bitter taste C corrosive D dissolve metals

This sedimentary rock is flaky and nonporous. It is made of clay and easily broken. What is it?

15th Amendment A. Gave women the right to vote B. Made poll taxes illegal C. Gave residents of washington D. C the right to vote. D. Gave any resident of the U. S the right to vote.

A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the new pressure, in mm Hg, of the helium gas if the volume is 20.0 L and if there is no change in temperature or quantity? 6550 mmHg 1000 mm Hg 1310 mmHg 300 mm Hg

Does a reaction stop once it has reached equilibrium? Explain

What is the total number of oh groups in a molecule of glycerol?

What are two ways to make a saturated solution of NH3 in 100. g H20 at 60°C become unsaturated?

What amount of heat energy is needed to raise the temperature of one pound of water by one degree F?

What do all of the flexible objects have in common