What is the use of formaldehyde

475 grams of solid calcium oxide reacts with water vapor to form solid calcium hydroxide. Calculate the heat of reaction. (A) - 221.1 kcal (B) + 290.8 kcal C) - 290.8 kcal (D) + 324.6 kcal (E) + 221.1 kcal

If 200.0 g of copper (II) sulfate react with an excess of zinc metal, what is the theoretical yield of copper?

Will kilogram of hydrogen contain more atoms than kilogram of lead? explain.

If 180.5 kj of heat are required to boil 80.00 grams of water, what is the heat of vaporization of water?

Matter must have two physical properties: 1. have mass, and 2.

1. What is an isomer? How many possible isomers of hexane are there? What are the structural differences between these isomers?

An ion of oxygen contains eight protons and has a charge of 2-. What must occur for this ion to become a neutral oxygen atom? Group of answer choices It must lose two electrons. It must gain two protons. It must gain two electrons.

If 46.1 g of copper at 11.6 °C is placed in 85.0 g of water at 72.4 °C, what is the final temperature of the mixture? The specific heat capacities of copper and water are 0.385 J/g. K and 4.184 J/g. K, respectively, a. 71.2 °C b. 51.0 °C C 69.5 °C d.

how many grams of water are produced when 15 grams of magnesium hydroxide are reacted with sulfuric acid

Which would have the lowest input force? A short lever with a large fulcrum A long lever with the fulcrum as far as possible from the load A Short lever with the fulcrum as close as possible to the load A long lever with the fulcrum as close as