Copper has a heat capacity of 0.386 J/g °C. If 15 g of copper has a temperature of 180 °C and it is added to a glass of water causing the temperature to decrease to 80°C. What is the amount of heat released by the metal?

A.)-1042J
B.)-579 J
C.) 579 J
D.)1042J

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.