A gas system has an unknown pressure and an initial temperature of 299K. When the temperature is increased to 620 K the pressure is measured at 7.77 atm. The volume is constant throughout. What was the initial pressure in atm?

What is the molarity of a solution that contains 17 g of nh3 in 0.50 l of solution?

The volume of a sample of water is 2.5 mL the volume of the sample in liters is

Copper has an atomic number of 29 that means there are 29 protons in the nucleus of each copper atom that's what the atomic number the number of protons in an atom in the atom of a certain element if one copper atom contains 29 protons how many

Which is a characteristic of a homogeneous mixture that is a liquid? It exhibits the Tyndall effect. Brownian motion is not visible in it. It cannot be separated using filtration. It has at least two phases.

How do the particle of water moves as energy passes through in a wave

Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times Celsius.

What type of overall charge, if any, does the balloon in Diagram B have? Explain how you determined your answer.

Move deep below the ocean's surface

The Ka of an acid is 1.3 x 10^-7. Based on the Ka and its relationship with Kw, what is the value of Kb? Use KaKb=Kw 1.3 x 10^-21 7.7 x 10^-15 1.3 x 10^-14 7.7 x 10^-8

A covalent bond is best described as Question 1 options: the sharing of electrons between atoms. the transfer of electrons. a bond between a metal and a nonmetal. a bond between a metal and a polyatomic ion.