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?

Summarize why a scientist measuring the diameter of an atom or the distance to the moon would use scientific notation

Why does it take so long time to develop a new variety of tomato

Nitrogen and oxygen gases are combined to form nitrogen dioxide gas. All gases are at the same temp and pressure. If 10 L of each gas react, determine the identity and volume of the excess reactant left over?

Soil can best be described as the A. loose covering of weathered rocks and decaying organic matter. B. sandy bottom of the ocean's floor. C. third layer beneath the Earth's surface. D. layer of bedrock four layers beneath the Earth's surface.

Calcium carbonate (CaCO3) is heated and decomposes to form calcium oxide (CaO) and carbon dioxide (CO2).

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?

Describe two ways that water moves through earthy atmosphere in the water cycle.

which of the following questions can use science as a method of inquiry? a. is cloning appropriate b. how can we protect crops from drought c. why is jazz a great type of music d. did dinosaurs exist

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3