Which agent causes sand dunes to form?

Ocean waves

Gravity

The wind carries the sand until it runs into an obstacle

Weathering of old rocks in the desert

An element consists of 5.85% of an isotope with mass 53.940 u, 91.75% of an isotope with mass 55.9349 u, 2.12% of an isotope with mass 56.9354 u, and 0.28% of an isotope with mass 57.9333 u.

A student performs a titration analysis for the following balanced reaction: 3 H2SO4 + 2 Al (OH) 3 → Al2 (SO4) 3 + 6 H2O If a 200.

Given that the ka for hocl is 3.5 * 10-8, calculate the k value for the reaction of hocl with oh-. a. 3.5 * 10-22 b. 3.5 * 10-8 c. 2.9 * 10-7 d. 3.5 * 106 e. none of these

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

Why is it important for scientist to montior meteors in the sky?

If 20.0 g of Pb transfers 4950 J of energy into 50.0 g of water, how much would the temperature of the water change?

Which examples demonstrate responses to stimuli? Check all that apply. A. A Venus flytrap closes on a fly. B. Large amounts of bacteria are present in a soil sample. C. A plant grows toward the sunlight. D. A rabbit has both white and black fur. E.

Aluminum carbonate (s) - aluminum oxide (s) - carbon dioxide (g)

Which physical state of matter has the most kinetic energy? A. plasma B. gas C. liquid D. solid

Dioxin, produced as a by-product of various industrial chemical processes, is suspected of contributing to the development of cancer and birth defects in animals and humans.