How many moles of 18l of nh3 at 30 celcius and 912 mmhg? how many grams?

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

What are the 4 phases of matter in order of increasing engery content?