Explanation

Explanation

A) Methane (CH₄) - Molecular weight = 16 g/mol
B) Ethane (C₂H₆) - Molecular weight = 30 g/mol
C) Propane (C₃H₈) - Molecular weight = 44 g/mol
D) Butane (C₄H₁₀) - Molecular weight = 58 g/mol

Correct Answer: D) Butane

Butane is the heaviest among the options listed, with a molecular weight of 58 g/mol.

Explanation

In beta-minus decay, a neutron is converted into a proton, increasing the number of protons and a corresponding increase in the atomic number of the element, while the mass number remains unchanged.

Thus, the new nucleus has one more proton than the original.

Explanation

In heavier nuclei, the number of neutrons typically exceeds the number of protons to help stabilize the nucleus.

This is due to the need for additional strong nuclear force to counteract the electrostatic repulsion between positively charged protons.

Explanation

In 2023, NASA scientists successfully extract oxygen from simulated lunar soil in a vacuum environment.

NASA is US space agency. 

Explanation

The sentence should read: "I did not like the dogs," 

Using "the" indicates that the speaker is referring to particular dogs, as opposed to dogs in general.

Explanation

"Rex" is a Latin word that means "king."

It is often used in legal and official documents to denote the reigning monarch, particularly in phrases like "Rex et Regina" (King and Queen).