Liquid nitrogen is used as a commercial refrigerant to flash freeze foods. Nitrogen boils at

-196°C. What is this temperature on the Kelvin temperature scale?

A scientist collects a core sample from 60 km deep in Earth. Which characteristic will she most likely observe in this sample? a. The sample has high iron content. b. The sample is very hot and liquefied. c. The sample mainly consists of granite. d.

Scientists estimate that the Earth formed some 4.6 billion years ago with the first forms of life appearing around 3.5 billion years ago. These first forms of life were simple prokaryotes.

If the molar mass of the compound in problem 3 is 73.8 grams/mole? what is the molecular formula?

What is the density of 10.2 mL of corn syrup that has a mass of 10.00 g?

4. Calculation of theoretical yield and percent yield You balanced this reaction earlier: Mg (s) + HCl (aq) H2 (g) + MgCl2 (aq) You used an excess amount of HCl (aq) for the reaction, therefore Mg is your limiting reactant.

What kingdom is humans in!

Propane (C3H8) has a molar mass of 132 g/mole. You started out the day with a tank containing 9071 g of propane. At the end of the day, your tank contained 7532 g of propane gas. How many moles of gas did you use?

Why decomposition of ammonium nitrate is a redox reaction?

Two formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compound? Explain.

My dog made become frightened and cover when he hears loud thunder this is an example of a reaction to What kind of stimuli A. chemicals B. light C. touch D. sound