Mole =

Mass of Radium Hydroxide = 987g
Molar Mass of

= ((226) + (2 * 16) + (2 * 1))
= 260 g / mol
∴ Moles of <span>

= </span>

= 3.796 mols
Not for sure but i would say the its B rate please
Answer: The atomic weight of any atom can be found by multiplying the abundance of an isotope of an element by the atomic mass of the element and then adding the results together. This equation can be used with elements with two or more isotopes: Carbon-12: 0.9889 x 12.0000 = 11.8668. Carbon-13: 0.0111 x 13.0034 = 0.1443.
Explanation:
Camels lose less water through their urine and feces than many other mammals. Their kidneys concentrate water heavily, leading to salty urine. The intestines also reabsorb water from intestinal material as it is digested, so dry feces are produced.