What is the atomic number for an abundant element with mass number 12?

How does temperature change in the troposphere differ from the stratosphere?

How many moles of HCI are formed from 3.5 moles of h2 and 3.5 moles of cl2? A 5 B 7 C 1 D 2 E 0.5

Which of the following statements correctly describes the substance with the formula ki? a. the compound of potassium iodide contains one ion of potassium and one ion of iodine. b. there is a one-to-two ratio of potassium ions to iodide ions. c.

In the reaction, 522.49 moles of barium chloride and unlimited amount of sulfuric acid react, to give, as products barium sulfate and hydrochloric acid. How much is the minimum amount of reactant required of sulfuric acid in moles.

When the products of a reaction have less energy than the reactants: The reaction is exothermic. The reaction is endothermic. The reactants lost internal energy. The change in enthalpy is positive.

Where might you find a temperature of 2 kelvin? a. north poleb. the equatorc. earth's cored. the coldest regions of outer space

A blank is a coil of wire that produces a magnetic field when it carries an electric current

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?

The flame from my candle gives off black smoke heat and light what type of changes do these indicate