Caculate the number if moles of the following: 800. g of Ca

A volume of 115 ml of h2o is initially at room temperature (22.00 ∘ c. a chilled steel rod at 2.00 ∘c is placed in the water. if the final temperature of the system is 21.40 ∘c, what is the mass of the steel bar?

The element gold occurs in which period?

Silver nitrate can be produced by dissolving metallic silver in concentrated nitric acid, with an addition product being hydrogen gas. Write the chemical formula for this reaction.

What of the following types of mass movement occurs along a curved surface? a. landslide b. mudflow c. slump d. creep

An 11.75 g sample of a common hydrate of cobalt (ii) chloride is heated. after heating, 9.25 g of anhydrous cobalt chloride remains. what is the formula and name for this hydrate?

A flask of fixed volume contains 1.00 mole of gaseous carbon dioxide and 88.0 g of solid carbon dioxide. the original pressure and temperature in the flask is 1.00 atm and 300. k. all of the solid carbon dioxide sublimes.

Oxygen is in group 16 of the periodic table. An oxygen ion (O2-) has a charge of - 2. Which of the following would be most likely to combine with an oxygen ion to form a new compound?

How and why - Why does ice float on water

Measurements show that enthalpy of a mixture of gaseous reactants decreases by 228. kJ during a certain chemical reaction, which is carried out at a constant pressure.

When 9.8 mol Fe react with 11.5 mol HCl, what is the limiting reactant and how many moles of H2 can be formed? unbalanced equation: Fe + HCl yields FeCl3 + H2 HCl is the limiting reactant, and 3.