If you reacted 4.87g of CH4 with 17.63g of oxygen gas. How many grams of water would be produced in this reaction? I need to know now!!!

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?