The heat capacity of aluminum is 0.900J/g°C. How much energy is needed to raise the temperature of a 345 g block of aluminum from 20.3°C to 85.2°C?

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

What is the formula of the ionic compound composed of calcium cations and chloride anions

When the ionic compound nabr dissolves in water, br– ions are pulled into solution by the attraction between what two particles? a. the na+ and br– ions b. the na+ ion and the negative end of a water molecule c. the br– ion and the positive end of a water molecule d. the br– ion and the negative end of a water molecule