Ms. owens class was studying magnets Ms. Owens showed her students how to make an electromagnet using a nail, a D-cell battery, and plastic coated wire. The students wrapped the wire around the nail and then attached the ends to the battery. When they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. They also tested whether they could increase the strength of their electromagnets by using more coils of wire. They recorded the class average of their results in the data table seen here. Ms. Owens asked her students to graph their data in a line graph. How should the students label the x-axis on their line graph

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?