1. An atom of silicon has a mass number of 28 and an atomic number of 14. How many protons and how many neutrons are in this atom? Show your calculation.

2. What is the chemical name for GaC1z?

Given the reaction at 101.3 kilopascals and 298 K:hydrogen gas + iodine gas → hydrogen iodide gas This reaction is classified as (1) endothermic, because heat is absorbed (2) endothermic, because heat is released (3) exothermic, because heat is

The molality of calcium chloride (CaCl2) in an aqueous solution is 2.46 m. What is mole fraction of the solute?

Which of the following people use chemicals

Which of the following is an example of heat transfer through conduction? a pan on the stove getting hot hot air rising inside a house the Sun drying clothes hanging outside a microwave warming a cup of water

How can the solubility of a solution be increased? By increasing the temperature. By decreasing the temperature. By increasing the amount of solvent added. By decreasing the amount of solvent added.

Read the scenario. Ammonia is obtained from a reaction between nitrogen and hydrogen gases. The mole ratio between hydrogen gas and nitrogen gas is 3 to 1, and the mole ratio between ammonia and hydrogen gases is 2 to 3.

Transmutation is the process of transforming one element into another through nuclear reactions. What will be the nuclide produced when Cf-249 is bombarded with C-12? Four neutrons are also produced by the reaction.

State the formula for density in words and mathematical symbols.

How many fe (ii) ions are there in 15.0 g of feso4?