How much heat has been lost when a 78 g piece of copper is placed into a calorimeter and cools from 120oC to 40oC ? Copper's specific heat capacity is 0.385 J/ goC. 2,402.4 J
-1201.2 J
1,201.2 J
- 2,402.4 J

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

mark brainliest and have a great day!

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.