5,4 g of aluminum metal react with 40ml of hydrochloric acid solution of density 1.2g/ml
- Write a balanced chemical eq. and identify the type
2. Are the reactants in stochiometry
3- Identify the limiting reagent
4. Find the mass of the excess
5. Find the
number of formula units of the salt obtained
6. Find the volume of the gas obtained at STP

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?