What is the atomic number of hydrogen?

Thermoclines in oceans are best developed at A. lower longitudes. B. higher longitudes. C. lower latitudes. D. higher latitudes.

Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na to Cl? (1) Electronegativity increases, and first ionization energy decreases.

The atomic radii of a divalent cation and a monovalent anion are 0.065 nm and 0.126 nm, respectively. (a) Calculate the force of attraction between these two ions at their equilibrium interionic separation (i. e.

Is the Hertzsprung-Russell diagram still a valid instrument in studying stars, given that it is over 100 years old?

For acidic solutions, which element is added to balance half-reactions? A. hydrogen B. hydroxide C. oxygen D. nitrogen

Under which conditions would the solubility of a gas be greatest? A. high pressure and high temperature B. high pressure and low temperature C. low pressure and high temperature D. low pressure and low temperature

How many milliliters is 0.55 L? O A. 1000 ml OB. 0.00055 mL O C. 550 ml D. 55 mL

When a warm front passes your location, the temperature rises rapidly. As a result, air density: B? increases decreases remains the same

A scientist wished to carry out a chemical reaction in which two moles of aluminum combine with three moles of sulfur. He has 2.70 g of aluminum to react. How many grams of sulfur must he take to satisfy all the aluminum atoms? 1.51 g 2.14 g 3.

Determine the equilibrium pH and speciation (concentration of each species) of the following two solutions. Neglect activity corrections. Species added Total concentration (solution a) HCl 10-3 M (solution b) NaCl 10-3 g.