I am used in pencils and often mistaken for lead. what mineral am i

320.93 - (6109.7/2.3) Express your answer to the appropriate number of significant digits.

When substances change into new substances, the process must involve: a physical change a chemical change heat being produced heat being absorbed

What is the molality of a solution containing 8.0 grams of solute in 0.50 kg of solvent? (molar mass of solute = 24 g)

Galena is an important economic mineral for which of the following? Question 7 options: lead gold platinum zinc

Why is the atomic mass for Calcium a decimal? How many protons does it have? Neutrons? Electrons?

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm? A. 7.7 degrees B. 16.6 degrees C. 6.

g write net ionic equations for the reactions of h2po4 - an amphiprotic ion with aqueous solutions of hcl koh

Eagles use sharp talons to grab fish from the water. What characteristic of life is this most directly an example of?

Which of the following statements about rock and mineral resources is true

What are similarities between opinion based research and observation based research