How do earthquakes happen?

A. Because of a release of pressure from plate movement

B. Only because of a volcanic eruption

C. Because of motion of ocean waves

D. Only because of a lack of pressure between plates

In Rutherford's experiment, why did the nucleus repel alpha particles? a. electrostatic repulsion between the negatively charged nucleus and alpha particles b. electrostatic attraction between the negatively charged nucleus and alpha particles c.

Given that the pka for the imidazole ring of a histidine has a pKa of 6.5 how many histidine side chains will be charged at a pH of 7.2?

It's sometimes said that water is a "universal solvent." Research this term. Why do some people describe water in this way? What aspect of its structure makes it a good solvent?

A sample of hydrogen peroxide (H202) has 2.0 grams of hydrogen (H) and 32 grams of oxygen (O). What is the percent composition of hydrogen peroxide

Describe the preparation of 40 liters of 0.02 m phosphate buffer, ph 6.9

Identify the missing numbers below to show the result of dividing the numbers 5.6 x 10^12 / 3.5 x 10^9 = A x 10^B

If you made 6 moles of NO2 How many grams of N2 did you use N2+2O2> 2NO2

At what temperature in Kelvin will 0.0965 moles of chlorine exert a pressure of 2.02 atm at a volume of 0.652 L?

How can a mixture of nails and sawdust be most efficiently separated into its component parts? A:By cooling it B:By filtering it C: By using a magnet D:By using a catalyst

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