How are scientists so sure that earthquakes happen the way they do?

If 20. g of a radioactive isotope are present at 1:00 pm and 5.0g remain at 2:00 pm, what is the half life of the isotope?

Consider the following reaction and select the false statement below. 10 I - (aq) + 16 H + (aq) + 2 MnO4 - (aq) → 5 I2 (s) + 2 Mn2 + (aq) + 8 H2O (l) (1) this is a reduction-oxidation (redox) reaction (2) the iodine ion is the reducing agent (3) the

Knowing the reactions between hydrogen gas and oxygen gas to form water is exothermic which would you say is greater: the average bond energies for hydrogen and oxygen or the bond energies for water? Explain.

Which of the Following Will result in increasing temperature of s gas

An order is received for Mylanta 30 cc PO q4h, Ranitidine 300 mg PO hs, enteric-coated aspirin 325 mg PO qd and Tetracycline 250 mg PO q6h. What possible problem is noticeable

Halogens have ... Electron affinity

Observe: Change the Surface area from Minimum to Maximum. You can imagine that a solid reactant has been dissolved in a liquid. How does this change how many Reactant B molecules are exposed to Reactant A?

When placed in a 200-mL square box, a substance has a spherical shape and has a volume of 75 mL When placed in a 200-mL circular tube, the same amount of that same substance has a spherical shape and a 75-mL volume.

What is the example to the word camouflage

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4