A coil of wire wrapped around an iron core generates a magnetic field when a current is passed through it. What is this device called?

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

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?