List the electronegativity trends for the elements from the periodic table

Titania buys a bag of fertilizers at the store.it reads 30-15-10. how much phosphorous is in the fertilizer a. 30% b. 15% c. 10%

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane