Based on their chemical formulas, which of these common substances is an

element?

A. Bleach (NaClo)

B. Silver (Ag)

C. Quartz (SIO2)

D. Marble (CaCO3)

Coffee is a solution of organic substances in water. is it a mixture or compound

Do you expect to find an atom with 26 protons and mass number 52

Describe what happens to rocks that are pushed under Earth's surface and become hotter and experience more pressure?

An atom can be compared to our solar system because: The nucleus gives off light like the sun. Both electrons and planets move quickly. Electrons orbit the nucleus like planets orbit the sun. All of the above.

Bob the chemist ran a TLC plate of his product, but the spot would not move off the baseline. The eluent he used consisted of a 30% polar / 70% non-polar solvent system.

When bases dissolve in water they release what type of negative ion?

An acid is added to water, and a new equilibrium is established. What is the system after the acid is added?

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?