Which element is found in nature only in compounds? A. sodium B. helium C. oxygen D. nitrogen

If 15.0 g of a solid dry ice (Co2) is placed into an evacuated 5.00 L container and allowed sublime until it is entirely in the gas phase, what pressure (in atm) will the gas exert at 299 K?

For an object that has positive constant acceleration what does the speed vs time graph look like

The Circulatory and Respiratory Quiz Activo At the site of gas exchange in the lungs, where does the oxygen move? O O2 moves from the alveoli to the white blood cells. O 0, moves from the white blood cells to the alveoli.

What sort of chemical hazard is thalidomide?

The chemical equation for the formation of ammonia is unbalanced. 3H2 (g) + N2 (g) Right arrow. NH3 (g) If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed? 1 2 3 4

Which is a non renewable resource that is used to generate electrical energy

How many grams of sulfur (S8S8) must be dissolved in 100.0 g naphthalene (C10H8C10H8) to make a 0.11 mm solution

Mason compare the properties of two compounds magnesium oxide is an ionic compound and hydrogen peroxide is not an ionic compound there for both compounds most likely

Cisplatin is synthesized as follows: K2PtCl4 (aq) + 2NH3 (aq)  Pt (NH3) 2Cl2 (s) + 2KCl (aq) What mass of cisplatin can be made from 100. g of K2PtCl4 and sufficient NH3? What mass of KCl is also produced?

What is the total number of protons in the nucleus of an atom of potassium-42? (1) 15 (3) 39 (2) 19 (4) 42