PLEASE ANSWE

Another student made an electromagnet with an iron nail with eight coils of wire wound around it connected to a 2-V battery. She wants to increase the strength of the electromagnet. What changes can she make to her design to increase its strength?

A. use a longer wire
B. wrap more coils of wire around the nail
C. use two 1-V batteries instead of a 2-V battery
D. use a 4-V battery

How many moles of al3+ ions are in 1.25 moles of al2o3

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.