How many neutrons does element X have if its atomic number is 22 and its mass number is 99?

Write the product for the result of dibromine oxide (Br2O) reacting with water (the product will have only 1 equivalent (atom) of bromine in it).

5. Which of the following is a chemical reaction? A Iron rusts B. Water freezes C. Sugar dissolves in water. D. Salt and pepper are mixed in a dish. 6. Abby is trying to Identify different liquids based on their physical properties. She has 4

Calculate the enthalpy change for the thermite reaction: 2al (s) + fe2o3 (s) →2fe (s) + al2o3 (s), δh∘rxn=-850 kj when 6.00 mol of al undergoes the reaction with a stoichiometrically equivalent amount of fe2o3.

How are chromosomes, genes, and DNA are connected?

Paul has different spoons for cooking. He told Sue that he likes to stir hot food with a wooden spoon because it does not burn his hand. Sue disagreed. She said that there was no difference between wooden and metal spoons. Was Sue right? Explain.

At what the pressure, in atmospheres, that O2, gas at 75°C has a density of 2.00 g/L

What aspect relates to energy

What is the specific heat capacity of silver metal if 75.00 g of the metal absorbs 56.4J of heat and the temperature rises 35.0°C?

Explain chemical bonds

During an investigation, similar effervescent tablets were dropped into a beaker containing cold water and a beaker containing tap water. The table below shows an incomplete record of the investigation.