What is true about the element francium (Fr, atomic number 87) ? More than one can be true A) It has seven valence electrons. B) It is likely to form ionic bonds. C) It is in Period 7. D) It is nonmetal. E) It is a metal.

What type of organic molecule is produced when a carboxylic acid reacts with an alcohol using an acid catalyst?

When you add together water and sodium, was any gas produced in the reaction?

Classify each of these reactions. 2 NaOH (aq) + Pb (ClO 3) 2 (aq) ⟶ 2 NaClO 3 (aq) + Pb (OH) 2 (s) 2NaOH (aq) + Pb (ClO3) 2 (aq) ⟶2NaClO3 (aq) + Pb (OH) 2 (s) CH 4 (g) + 2 O 2 (g) ⟶ CO 2 (g) + 2 H 2 O (l) CH4 (g) + 2O2 (g) ⟶CO2 (g) + 2H2O (l) 2 AgNO

A sample of calcium oxide has mass of 2.80 g. The molar mass of CaO is 58.08 g/mold how many moles of CaO does this sample contain

What is the smallest identifiable unit of a compound?

What happens when two or more atoms react?

If cobalt metal is mixed with excess sulfur and heated strongly, a sulfide is produced that contains 55.06% cobalt by mass. Calculate the empirical formula of the sulfide.

Calcium's atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?

The doldrums region on Earth is created by an amount of heating from the Sun that results in the rising of warm, moist air, low air pressure, cloudiness, high humidity, and numerous forms of severe weather, such as thunderstorms.

If a certain gas occupies a volume of 19 L when the applied pressure is 9.5 atm, find the pressure when the gas occupies a volume of 4.8 L