A substance has a specific heat capacity of 2.0 J/g °C. How many joules are needed to raise the temperature of 30.0 g of this substance from 0°C to15°C? a. 1 J

b. -1 J

c. -900 J

d. 900 J

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

What is the overall order of reaction for rate = k[no]2[o2]

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.