8. 2520 J of heat is added to a piece of iron. Determine the initial temperature of 20 g of iron (c = 0.499 J/gC) to reach a final temperature of 130 C. 2. Determine the mass of lead (c = 0.160 J/gC) that requires 204 J of energy to change the temperature 23.0 C.

(i cant find these out ;-;)

Write a brief passage describing a neutral atom of nitrogen-14 (n-14). describe the number of protons, neutrons, and electrons in the atom, where each type of particle is located, and how the terms atomic number, mass number, and atomic mass are related to the particles. use the periodic table to you. 14 protons and eletrons since its a neutral atom

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

7. in the cycle, a virus integrates its dna into the host's dna, and its dna is replicated when the host dna is replicated. a. infectious b. retroviral c. lysogenic d.lytic