How would the mass of one mole of iron atoms compare to the mass of one alumminum

According to the tide table below what time of day will the highest tide occur?

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

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.