5) A substance requires 345 J of heat to raise the temperature from 17 oC to 48 oC. . If the mass of the substance is 25 g, what is the specific heat of the substance?
6)
18 g of zinc was heated from 50°C to 85°C. How much energy was used to heat Zn? (Specific heat capacity of Zn 0.440 J/g °C)

Which equation represents a fission reaction? o "9n+h—150 o 235u + n—190cs + rb+25 o be + he—1c + in o 28 np —> 2390 pute

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What’s the theoretical yield of solid lead