At room temperature, acetylene has a velocity of 480 m/s. At the same time temperature, an unknown noble gas has a velocity of 267 m/s. What is the unknown gas?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

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.