A 25 g piece of copper wire is heated, and the temperature of the wire changes from 20°C to 75°C. The amount of heat absorbed is 250 cal. What is the
specific heat of copper?
343.8 kJ
0.18 J/g °C
0.18 cal/g °C

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

The rules of engagement (roe) working group is often used to (select all that apply.)

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.