The Voyager I space probe is powered by a generator that uses plutonium-238 (238Pu) as a fuel source. Plutonium-238 has a half-life of 87.7 years. If Voyager I was launched in 1977, what percentage of the original 238Pu will remain in 2025, the year in which Voyager I is expected to cease operation?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.