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?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Choose all the answers that apply. ionic compounds dissolve easily in water do not dissolve in water have low melting points have high melting points conduct electricity when melted