450 J of energy is required to raise the temperature of a block of aluminum from 20 °C to 60 °C. Calculate the mass of aluminum present. Specific Heat (J/g•°C) of aluminum is 0.90.

The p sub shell can hold up to 8 electrons in an atom. true or false?

100 points answer quick the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.