Which of these equations is balanced? A. 2Nac1+H2so4--->Na2so4+2Hc1 B. 2cao+H20-->CaC0h) 2 C. H20+co-->h2c03 D. MN+FE-->mns+fe

Which term names how clouds form by the collection of water vapor in the atmosphere? A. evaporation B. condensation C. precipitation D. seepage

Applying the bohr model to a triply ionized beryllium atom (be3+, z=4), find the ionization energy required to remove the final electron in be3+.

Why do elements with a higher atomic number tend to be more radioactive

Which of the following is an example of chemical weathering? A. Frost wedging B. Animal activity C. Oxidation D. Abrasion

Why then is a diamond extremely hard and sparkly and Graphite is soft and gray and dull?

Before a race, an athlete warms up by jogging around the track shown below at a constant rate of 2.3 m/s. What statement best describes his motion as he jogs around the curved part of the track?

What physical property is changed when a waitress pours coffee from a pot into four mugs? temperature density volume color

Calcule o calor especifico do estanho sabendo que foram necessarias 100 cal para elevar em 20ºC a temperatura de 100 g de estanho

What's the smallest part of a compound

The inertness of the noble gases is due to a. the outermost shell has six electrons. b. the bonds they form with other elements. c. the number of protons and neutrons. d.